Loading...
HomeMy WebLinkAbout2018 International Mechanical Code2 0 1 8 Imc INTERNATIONAL MECHANICAL CODE' I NTE R N A T I O N A L COD ES" 2018 I -CODE BONUS OFFER Get a free 45-day online subscription to ICC's premJumACCESS' 2018 I -Codes Complete Collection Test drive many powerful, time -saving tools available to you from premJumACCESS To activate your bonus, visit www.iccsafe.org/codebonus A Member of the International Code Family° INTERNATIONAL MECHANICAL CODE° I.i Agffi,­,AOICC N,fiuN¢,TA,d,awo.mALLh¢d,mansbyan O,d Party o,±DFI,m®dahONtd Emgh ass¢o,FA mpyncg and Mwodwg,ISd ANY VNAVTHORIVED REPRODUCTION ORDISIRIB VIION LEA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PBNALTIBSTHBRB VNDBR 2018 International Mechanical Code® First Printing August 2017 ISBN 978-1-60983-743-3 (soft-cover edition) ISBN 978-1-60983-742-6 (loose-leaf edition) COPYRIGHT © 2017 by INTERNATIONAL CODE COUNCIL, INC Date of First Publication August 31, 2017 ALL RIGHTS RESERVED This 2018International Mechanical Code® is a copyrighted work owned by the International Code Council, Inc Without advance written permission from the copyright owner, no part of this book may be reproduced, distributed or transmitted in any form or by any means, including, without limitation, electronic, optical or mechanical means (by way of example, and not limitation, photocopying or recording by or in an information storage retrieval system) For information on use rights and permissions, please contact Publications, 4051 Flossmoor Road, Country Club Hills, IL 60478 Phone 1-888-ICC- SAFE (422-7233) Trademarks "International Code Council," the "International Code Council' logo, "ICC," the "ICC logo, "International Mechanical Code," "IMC and other names and trademarks appearing in this book are trademarks of the International Code Council, Inc , and/or its licensors (as applicable), and may not be used without permission PRINTED IN THE U S A CITFIEItOO2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Dm,(hv dmepf dv od mm).(Qtyof PnmdNmod)O,d,,N=b¢x1ooe1vms ocJM IOZM0 ox oo PAL (PST) tto I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOol ANYUNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER Introduction Development PREFACE The International Mechanical Code' (I MC') establishes minimum requirements for mechanical sys- tems using prescriptive and performance -related provisions. It is founded on broad -based principles that make possible the use of new materials and new mechanical designs. This 2018 edition is fully compatible with all of the International Codes' (I-Codes°)Tublished by the International Code Council° (ICC°), including the International Building Code', International Energy Conservation Code°, International Existing Building Code°, International Fire Code°, International Fuel Gas Code°, International Green Construction Code°, International Plumbing Code°, International Private Sew- age Disposal Code°, International Property Maintenance Code°, International Residential Code°, International swimming Pool and spa Code°, International Wildland-Urban Interface Code°, Inter- national Zoning Code° and International Code Council Performance Code°. The I -Codes, including this International Mechanical Code, are used in a variety of ways in both the public and private sectors. Most industry professionals are familiar with the I -Codes as the basis of laws and regulations in communities across the U.S. and in other countries. However, the impact of the codes extends well beyond the regulatory arena, as they are used in a variety of nonregula- tory settings, including: • Voluntary compliance programs such as those promoting sustainability, energy efficiency and disaster resistance. • The insurance industry, to estimate and manage risk, and as a tool in underwriting and rate decisions. • Certification and credentialing of individuals involved in the fields of building design, con- struction and safety. • Certification of building and construction -related products. • U.S. federal agencies, to guide construction in an array of government -owned properties. • Facilities management. • 'Best practices" benchmarks for designers and builders, including those who are engaged in projects in jurisdictions that do not have a formal regulatory system or a governmental enforcement mechanism. • College, university and professional school textbooks and curricula. • Reference works related to building design and construction. In addition to the codes themselves, the code development process brings together building pro- fessionals on a regular basis. It provides an international forum for discussion and deliberation about building design, construction methods, safety, performance requirements, technological advances and innovative products. This 2018 edition presents the code as originally issued, with changes reflected in the 2003 through 2015 editions and further changes approved by the ICC Code Development Process through 2016. A new edition such as this is promulgated every 3 years. This code is founded on principles intended to establish provisions consistent with the scope of a mechanical code that adequately protects public health, safety and welfare; provisions that do not unnecessarily increase construction costs; provisions that do not restrict the use of new materials, products or methods of construction; and provisions that do not give preferential treatment to par- ticular types or classes of materials, products or methods of construction. 2018 INTERNATIONAL MECHANICAL CODE® III I " ' COTFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER Maintenance The International Mechanical Code is kept up to date through the review of proposed changes sub- mitted by code enforcement officials, industry representatives, design professionals and other interested parties. Proposed changes are carefully considered through an open code development process in which all interested and affected parties may participate. The ICC Code Development Process reflects principles of openness, transparency, balance, due process and consensus, the principles embodied in OMB Circular A-119, which governs the federal government's use of private -sector standards. The ICC process is open to anyone; there is no cost to participate, and people can participate without travel cost through the ICC's cloud -based app, cdp- Access°. A broad cross section of interests are represented in the ICC Code Development Process. The codes, which are updated regularly, include safeguards that allow for emergency action when required for health and safety reasons. In order to ensure that organizations with a direct and material interest in the codes have a voice in the process, the ICC has developed partnerships with key industry segments that support the ICC's important public safety mission. Some code development committee members were nomi- nated by the following industry partners and approved bythe ICC Board: American Institute of Architects (AIA) National Association of Home Builders (NAHB) The code development committees evaluate and make recommendations regarding proposed changes to the codes. Their recommendations are then subject to public comment and council -wide votes. The ICC's governmental members —public safety officials who have no financial or business interest in the outcome —cast the final votes on proposed changes. The contents of this work are subject to change through the code development cycles and by any governmental entity that enacts the code into law. For more information regarding the code devel- opment process, contact the Codes and Standards Development Department of the International Code Council. While the I -Code development procedure is thorough and comprehensive, the ICC, its members and those participating in the development of the codes disclaim any liability resulting from the publication or use of the I -Codes, or from compliance or noncompliance with their provisions. The ICC does not have the power or authority to police or enforce compliance with the contents of this code. Code Development Committee Responsibilities (Letter Designations in Front of Section Numbers) In each code development cycle, proposed changes to this code are considered at the Committee Action Hearings by the International Mechanical Code Development Committee, whose action con- stitutes a recommendation tothevoting membership for final action on the proposed change. Code change proposals to sections of the code that are preceded by a bracketed letter designation are considered by a different code development committee. For example, proposed changes to code sections that have [BG] in front of them (e.g., [BG] 309.1) are considered by the IBC —General Code Development Committee at the Committee Action Hearing. The bracketed letter designations for committees responsible for portions of this code are as fol- lows: [A] = Administrative Code Development Committee [BE] = IBC —Egress Code Development Committee [BF] = IBC —Fire Safety Code Development Committee [BG] = IBC —General Code Development Committee [BS] = IBC —Structural Code Development Committee IV 2018 INTERNATIONAL MECHANICAL CODE® firill ' URR COTy IghtOoz0ly ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf dwood mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) T--tt S I ( I.i Agffi,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORI]AD REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER [E] = International Energy Conservation Code Development Committee [F] = International Fire Code Development Committee [FG] = International Fuel Gas Code Development Committee [P] = International Plumbing Code For the development of the 2021 edition of the I -Codes, there will be two groups of code devel- opment committees and they will meet in separate years. Group A Codes Group B Codes (Heard in 2018, Code Change Proposals (Heard in 2019, Code Change Proposals Deadline: January 8, 2018) Deadline: January 7, 2019) International Building Code Administrative Provisions (Chapter 1 of all — Egress (Chapters 10, 11, Appendix E) codes except IECC, IRC and IgCC, administra- - Fire Safety (Chapters 7, 8, 9, 14, 26) tive updates to currently referenced Stan- -General (Chapters 2-6, 12, 27-33, dards, and designated definitions) Appendices A, B, C, D, K, N) International Fire Code International Building Code —Structural (Chapters 15-25, Appendices F, G,H,I,1,L,M) International Fuel Gas Code International Existing Building Code International Mechanical Code International Energy Conservation Code — Commercial International Plumbing Code International Energy Conservation Code — Residential — IECC—Residential — IRC—Energy (Chapter 11) International Property Maintenance Code International Green Construction Code (Chapter 1) International Private Sewage Disposal Code International Residential Code — IRC—Building (Chapters 1-10, Appendices E, F, H,1, K, L, M, 0, Q, R, S, T) International Residential Code —IRC—Mechanical (Chapters 12-23) —IRC—Plumbing (Chapters 25-33, Appendices G, I, N, P) International Swimming Pool and Spa Code International Wildland-Urban Interface Code International Zoning Code Note: Proposed changes to the ICC Performance CodeTM' will be heard by the code development committee noted in brack- ets [ ] in the text of the ICC Performance CodeTM' Code change proposals submitted for code sections that have a letter designation in front of them will be heard by the respective committee responsible for such code sections. Because differ- ent committees hold Committee Action Hearings in different years, proposals for this code will be heard by committees in both the 2018 (Group A) and the 2019 (Group B) code development cycles. For example, every section of Chapter 1 of this code is designated as the responsibility of the Administrative Code Development Committee, and that committee is part of the Group B code hearings. This committee will conduct its code development hearings in 2019 to consider all code change proposals for Chapter 1 of this code and proposals for Chapter 1 of all I -Codes except the International Energy Conservation Code, International Residential Code and International Green Construction Code. Therefore, any proposals received for Chapter 1 of this code will be assigned to the Administrative Code Development Committee for consideration in 2019. Another example is Section [F] 606.4 of this code, which is designated as the responsibility of the International Fire Code Development Committee. This committee will conduct its code develop- ment hearings in 2019 to consider code change proposals in its purview, which includes any propos- als to Section [F] 606.4. 2O18 INTERNAT10NAL MECHANICAL CODE® v I " ' COTFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 01jM IOZM0 m. oo PAL(PST) Tug tt ( L­Agffi,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,o,,byany ,dpartyo,AxmboemPOo[vs3ANYUNAUTHORIZED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER In some cases, another committee in Group A will be responsible for a section of this code. For example, Section 607 has a [BF] in front of the numbered sections, indicating that these sections of the code are the responsibility of one of the International Building Code Development Committees. The International Building Code is in Group A; therefore, any code change proposals to this section will be due before the Group A deadline of January 2018, and these code change proposals will be assigned to the appropriate International Building Code Development Committee for consideration. It is very important that anyone submitting code change proposals understands which code development committee is responsible for the section of the code that is the subject of the code change proposal. For further information on the Code Development Committee responsibilities, please visit the ICC website at www.iccsafe.org/scoping. Marginal Markings Solid vertical lines in the margins within the body of the code indicate a technical change from the requirements of the 2015 edition. Deletion indicators in the form of an arrow (E*) are provided in the margin where an entire section, paragraph, exception or table has been deleted or an item in a list of items or a table has been deleted. Coordination of the International Codes Italicized Terms Adoption The coordination of technical provisions is one of the strengths of the ICC family of model codes. The codes can be used as a complete set of complementary documents, which will provide users with full integration and coordination of technical provisions. Individual codes can also be used in subsets or as stand-alone documents. To make sure that each individual code is as complete as pos- sible, some technical provisions that are relevant to more than one subject area are duplicated in some of the model codes. This allows users maximum flexibility in their application of the I -Codes. Word and terms defined in Chapter 2, Definitions, are italicized where they appear in code text and the Chapter 2 definitions applies. Where such words and terms are not italicized, common -use defi- nitions apply. The words and terms selected have code -specific definitions that the user should read carefully to facilitate better understanding of the code. The International Code Council maintains a copyright in all of its codes and standards. Maintaining copyright allows the ICC to fund its mission through sales of books, in both print and electronic for- mats. The ICC welcomes adoption of its codes by jurisdictions that recognize and acknowledge the ICC's copyright in the code, and further acknowledge the substantial shared value of the public/pri- vate partnership for code development between jurisdictions and the ICC. The ICC also recognizes the need for jurisdictions to make laws available to the public. All I -Codes and I -Standards, along with the laws of many jurisdictions, are available for free in a nondownload- able form on the ICC's website. Jurisdictions should contact the ICC at adoptions@iccsafe.org to learn how to adopt and distribute laws based on the International Mechanical Code in a manner that provides necessary access, while maintaining the ICC's copyright. 2018 INTERNATIONAL MECHANICAL CODE® COTFIghtOO2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Dm,(hv dmepf dwood mm).(Qtyof PnmdNmod)O,d,,N=b¢x100e1vms 01JM IOZM00200 PAL (PST) T­tto I.—Ag,,vo ,AOICC Nof th,,e,od0moo.mfw ,,e od0moozbyany ,dpartyo, AxmboemPOo[vsd ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER To facilitate adoption, several sections of this code contain blanks for fill-in information that needs to be supplied by the adopting jurisdiction as part of the adoption legislation. For this code, please see: Section 101.1. Insert: [NAME OF JURISDICTION] Section 106.5.2. Insert: [APPROPRIATE SCHEDULE] Section 106.5.3. Insert: [PERCENTAGES IN TWO LOCATIONS] Section 108.4. Insert: [OFFENSE, DOLLAR AMOUNT, NUMBER OF DAYS] Section 108.5. Insert: [DOLLAR AMOUNT IN TWO LOCATIONS] 2018 INTERNAT10NAL MECHANICAL CODE® vii I " ' COTFIghtOO?.o,v ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 04JM IOZM0 m. oo PAL(PST) Tug tt ( I.—Ag,,vo ,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER viii 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S ( " I I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER EFFECTIVE USE OF THE INTERNATIONAL MECHANICAL CODE The International Mechanical Code' (IMC°) is a model code that regulates the design and installa- tion of mechanical systems, appliances, appliance venting, duct and ventilation systems, combus- tion air provisions, hydronic systems and solar systems. The purpose of the code is to establish the minimum acceptable level of safety and to protect life and property from the potential dangers associated with the installation and operation of mechanical systems. The code also protects the personnel that install, maintain, service and replace the systems and appliances addressed by this code. The IMC is primarily a prescriptive code with some performance text. The code relies heavily on product specifications and listings to provide much of the appliance and equipment installation requirements. The general Section 105.2 and the exception to Section 403.2 allow designs and installations to be performed by approved engineering methods as alternatives to the prescriptive methods in the code. The format of the IMC allows each chapter to be devoted to a particular subject with the excep- tion of Chapter 3, which contains general subject matters that are not extensive enough to warrant their own independent chapter. Chapter 1 Scope and Administration. Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. A mechanical code, like any other code, is intended to be adopted as a legally enforceable document and it cannot be effective with- out adequate provisions for its administration and enforcement. The provisions of Chapter 1 estab- lish the authority and duties of the code official appointed by the jurisdiction having authority and also establish the rights and privileges of the design professional, contractor and property owner. Chapter 2 Definitions. Chapter 2 is the repository of the definitions of terms used in the body of the code. Codes are technical documents and every word and term can impact the meaning of the code text and the intended results. The code often uses terms that have a unique meaning in the code and the code meaning can differ substantially from the ordinarily understood meaning of the term as used outside of the code. The terms defined in Chapter 2 are deemed to be of prime importance in establishing the mean- ing and intent of the code text that uses the terms. The user of the code should be familiar with and consult this chapter because the definitions are essential to the correct interpretation of the code and because the user may not be aware that a term is defined. Chapter 3 General Regulations. Chapter 3 contains broadly applicable requirements related to appliance location and installation, appliance and systems access, protection of structural elements, condensate disposal and clearances to combustibles, among others. Chapter 4 Ventilation. Chapter 4 includes means for protecting building occupant health by con- trolling the quality of indoor air and protecting property from the effects of inadequate ventilation. In some cases, ventilation is required to prevent or reduce a health hazard by removing contami- nants at their source. Ventilation is both necessary and desirable for the control of air contaminants, moisture and temperature. Habitable and occupiable spaces are ventilated to promote a healthy and comfortable environment for the occupants. Uninhabited and unoccupied spaces are ventilated to protect the building structure from the harmful effects of excessive humidity and heat. Ventilation of specific occupancies is necessary to minimize the potential for toxic or otherwise harmful substances to reach dangerously high concentrations in air. 2018 INTERNATIONAL MECHANICAL CODE® ix I i l i COTFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tt ( I.—Ag,,vo ,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER Chapter 5 Exhaust Systems. Chapter 5 provides guidelines for reasonable protection of life, property and health from the hazards associated with exhaust systems, air contaminants and smoke development in the event of a fire. In most cases, these hazards involve materials and gases that are flammable, explosive, toxic or otherwise hazardous. Where contaminants are known to be present in quantities that are irritating or harmful to the occupants' health or are hazardous in a fire, both naturally and mechanically ventilated spaces must be equipped with mechanical exhaust systems capable of collecting and removing the contaminants. This chapter contains requirements for the installation of exhaust systems, with an emphasis on the structural integrity of the systems and equipment involved and the overall impact of the sys- tems on the fire safety performance of the building. It includes requirements for the exhaust of commercial kitchen grease- and smoke -laden air, hazardous fumes and toxic gases, clothes dryer moisture and heat and dust, stock and refuse materials. Chapter 6 Duct Systems. Chapter 6 of the code regulates the materials and methods used for constructing and installing ducts, plenums, system controls, exhaust systems, fire protection sys- tems and related components that affect the overall performance of a building's air distribution sys- tem and the reasonable protection of life and property from the hazards associated with air -moving equipment and systems. This chapter contains requirements for the installation of supply, return and exhaust air systems. Specific exhaust systems are also addressed in Chapter 5. Information on the design of duct systems is limited to that in Section 603.2. The code is very much concerned with the structural integrity of the systems and the overall impact of the systems on the fire safety and life safety performance of the building. Design considerations such as duct sizing, maximum effi- ciency, cost effectiveness, occupant comfort and convenience are the responsibility of the design professional. The provisions for the protection of duct penetrations of wall, floor, ceiling and roof assemblies are extracted from the International Building Code. Chapter 7 Combustion Air. Complete combustion of solid and liquid fuel is essential for the proper operation of appliances, for control of harmful emissions and for achieving maximum fuel efficiency. The specific combustion air requirements provided in previous editions of the code have been deleted in favor of a single section that directs the user to NFPA 31 for oil -fired appliance combus- tion air requirements and the manufacturer's installation instructions for solid -fuel burning appli- ances. For gas -fired appliances, the provisions of the International Fuel Gas Code are applicable. Chapter 8 Chimneys and Vents. Chapter 8 is intended to regulate the design, construction, installation, maintenance, repair and approval of chimneys, vents and their connections to solid and liquid fuel -burning appliances. The requirements of this chapter are intended to achieve the com- plete removal of the products of combustion from fuel -burning appliances and equipment. This chapter includes regulations for the proper selection, design, construction and installation of a chimney or vent, along with appropriate measures to minimize the related potential fire hazards. A chimney or vent must be designed for the type of appliance or equipment it serves. Chimneys and vents are designed for specific applications depending on the flue gas temperatures and the type of fuel being burned in the appliance. Chimneys and vents for gas -fired appliances are covered in the International Fuel Gas Code. Chapter9 Specific Appliances, Fireplaces and Solid Fuel -burning Equipment. Chapter 9 sets minimum construction and performance criteria for fireplaces, appliances and equipment and provides for the safe installation of these items. It reflects the code's intent to specifically address all of the types of appliances that the code intends to regulate. Other regulations affecting the installation of solid fuel -burning fireplaces, appliances and accessory appliances are found in Chap- ters 3, 6, 7, 8, 10, 11, 12, 13 and 14. 2018 INTERNATIONAL MECHANICAL CODE® COTFIghtOO2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Dm,(hvdmepf dwood mm).(Qtyof PnmdNmod)O,d,,N=b¢x100e1vms 01JM IOZM00200 PAL (PST) T­tt I.i Ag,,­,AOICC Nof th,,e,od0moo.mfw ,,e od0moozbyany ,dPartyo, AxmboemPOo[vsd ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER Chapter 10 Boilers, Water Heaters and Pressure Vessels. Chapter 10 presents regulations for the proper installation of boilers, water heaters and pressure vessels to protect life and property from the hazards associated with those appliances and vessels. It applies to all types of boilers and pressure vessels, regardless of size, heat input, operating pressure or operating temperature. Because pressure vessels are closed containers designed to contain liquids, gases or both under pressure, they must be designed and installed to prevent structural failures that can result in extremely hazardous situations. Certain safety features are therefore provided in Chapter 10 to reduce the potential for explosion hazards. Chapter 11 Refrigeration. Chapter 11 contains regulations pertaining to the life safety of build- ing occupants. These regulations establish minimum requirements to achieve the proper design, construction, installation and operation of refrigeration systems. Refrigeration systems are a combi- nation of interconnected components and piping assembled to form a closed circuit in which a refrigerant is circulated. The system's function is to extract heat from a location or medium, and to reject that heat to a different location or medium. This chapter establishes reasonable safeguards for the occupants by defining and mandating practices that are consistent with the practices and experience of the industry. Chapter12 Hydronic Piping. Hydronic piping includes piping, fittings and valves used in building space conditioning systems. Applications include hot water, chilled water, steam, steam conden- sate, brines and water/antifreeze mixtures. Chapter 12 contains the provisions that govern the con- struction, installation, alteration and repair of all hydronic piping systems that affect reliability, serviceability, energy efficiency and safety. Chapter 13 Fuel Oil Piping and Storage. Chapter 13 regulates the design and installation of fuel oil storage and piping systems. The regulations include reference to construction standards for above -ground and underground storage tanks, material standards for piping systems (both above- ground and underground) and extensive requirements for the proper assembly of system piping and components. The International Fire Code (IFC) covers subjects not addressed in detail here. The provisions in this chapter are intended to prevent fires, leaks and spills involving fuel oil storage and piping systems. Chapter14 Solar Thermal Systems. Chapter 14 establishes provisions for the safe installation, operation and repair of solar energy systems used for space heating or cooling, domestic hot water heating or processing. Although such systems use components similar to those of conventional mechanical equipment, many of these provisions are unique to solar energy systems. Chapter 15 Referenced Standards. Chapter 15 lists all of the product and installation stan- dards and codes that are referenced throughout Chapters 1 through 14. As stated in Section 102.8, these standards and codes become an enforceable part of the code (to the prescribed extent of the reference) as if printed in the body of the code. Chapter 15 provides the full title and edition year of the standards and codes in addition to the address of the promulgators and the section numbers in which the standards and codes are referenced. Appendix A Chimney Connector Pass-throughs. Appendix A provides figures that illustrate various requirements in the body of the code. Figure A-1 illustrates the chimney connector clear- ance requirements of Table 803.10.4. Appendix B Recommended Permit Fee Schedule. Appendix B provides a sample permit fee schedule for mechanical permits. The local jurisdiction can adopt this appendix and fill in the dollar amounts in the blank spaces to establish their official permit fee schedule. The ICC does not estab- lish permit fees because the code is adopted throughout the country and there are vast differences in operating budgets between different parts of the country, as well as between large and small municipalities within the same region. 2018 INTERNATIONAL MECHANICAL CODE® A I i l i COTFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER A! 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S ( " I I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER TABLE OF CONTENTS CHAPTER 1 SCOPE AND ADMINISTRATION .... 1 PART I —SCOPE AND APPLICATION .............. I Section 101 General 1 102 Applicability 1 PART 2 ADMINISTRATIONAND ENFORCEMENT ................................ 2 103 Department of Mechanical Inspection 2 104 Duties and Powers of the Code Official 2 105 Approval 3 106 Permits 3 107 Inspections and Testing 5 108 Violations 6 109 Means of Appeal 7 110 Temporary Equipment, Systems and Uses 8 CHAPTER 2 DEFINITIONS ..................... 9 Section 201 General 9 202 General Definitions 9 CHAPTER 3 GENERAL REGULATIONS ........ 21 Section 301 General 21 302 Protection of Structure 22 303 Equipment and Appliance Location 23 304 Installation 23 305 Piping Support 25 306 Access and Service Space 25 307 Condensate Disposal 27 308 Clearance Reduction 28 309 Temperature Control 29 310 Explosion Control 29 311 Smoke and Heat Vents 29 312 Heating and Cooling Load Calculations 29 CHAPTER 4 VENTILATION ................... 31 Section 401 General 31 402 Natural Ventilation 31 403 Mechanical Ventilation 32 404 Enclosed Parking Garages 35 405 Systems Control 35 406 Ventilation of Uninhabited Spaces 35 407 Ambulatory Care Facilities and Group I-2 Occupancies 35 CHAPTER 5 EXHAUST SYSTEMS .............. 41 Section 501 General 41 502 Required Systems 42 503 Motors and Fans 49 504 Clothes Dryer Exhaust 49 505 Domestic Cooking Exhaust Equipment 51 506 Commercial Kitchen Hood Ventilation System Ducts and Exhaust Equipment 51 507 Commercial Kitchen Hoods 56 508 Commercial Kitchen Makeup Air 59 509 Fire Suppression Systems 60 510 Hazardous Exhaust Systems 60 511 Dust, Stock and Refuse Conveying Systems 62 512 Subslab Soil Exhaust Systems 63 513 Smoke Control Systems 63 514 Energy Recovery Ventilation Systems 67 CHAPTER 6 DUCT SYSTEMS .................. 69 Section 601 General 69 602 Plenums 70 603 Duct Construction and Installation 72 604 Insulation 74 605 Air Filters 75 606 Smoke Detection Systems Control 75 607 Duct and Transfer Openings 76 CHAPTER 7 COMBUSTION AIR ............... 81 Section 701 General 81 CHAPTER 8 CHIMNEYS AND VENTS .......... 83 Section 801 General 83 2018 INTERNAT10NAL MECHANICAL CODE® XIII I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED A--dby HDOP, Van Cm,(hv dmep -dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x100elvms ocJM 10-0 m. oo PAL (PST)p--tto ( I.—A,e^®,AOICC Nof th,,e,od�oamfw ,,e od�o¢tbyany ,dPartyo, AMb�tmPOo�vsd 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER TABLE OF CONTENTS 802 Vents 84 803 Connectors 85 804 Direct -vent, Integral Vent and Mechanical Draft Systems 86 805 Factory -built Chimneys 87 806 Metal Chimneys 88 CHAPTER 9 SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL -BURNING EQUIPMENT ..... 89 Section 901 General 89 902 Masonry Fireplaces 89 903 Factory -built Fireplaces 89 904 Pellet Fuel -burning Appliances 89 905 Fireplace Stoves and Room Heaters 89 906 Factory -built Barbecue Appliances 89 907 Incinerators and Crematories 90 908 Cooling Towers, Evaporative Condensers and Fluid Coolers 90 909 Vented Wall Furnaces 90 910 Floor Furnaces 90 911 DuctFumaces 91 912 Infrared Radiant Heaters 91 913 Clothes Dryers 91 914 Sauna Heaters 91 915 Engine and Gas Turbine -powered Equipment and Appliances 91 916 Pool and Spa Heaters 91 917 Cooking Appliances 92 918 Forced -air Warm -air Furnaces 92 919 Conversion Burners 92 920 Unit Heaters 92 921 Vented Room Heaters 92 922 Kerosene and 011-fired Stoves 92 923 Small Ceramic Kilns 92 924 Stationary Fuel Cell Power Systems 92 925 Masonry Heaters 92 926 Gaseous Hydrogen Systems 93 927 Radiant Heating Systems 93 928 Evaporative Cooling Equipment 93 929 High -volume Large -diameter Fans 93 CHAPTER 10 BOILERS, WATER HEATERS AND PRESSURE VESSELS ........ 95 Section 1001 General 95 1002 Water Heaters 95 1003 Pressure Vessels 95 1004 Boilers 95 1005 Boller Connections 96 1006 Safety and Pressure Relief Valves and Controls 96 1007 Boller Low-water Cutoff 97 1008 Bottom Blowoff Valve 97 1009 Hot Water Boller Expansion Tank 97 1010 Gauges 98 1011 Tests 98 CHAPTER 11 REFRIGERATION ............... 99 Section 1101 General 99 1102 System Requirements 99 1103 Refrigeration System Classification 100 1104 System Application Requirem ents 106 1105 Machinery Room, General Requirements 107 1106 Machinery Room, Special Requirements 108 1107 Refrigerant Piping 109 1108 Field Test 110 1109 Periodic Testing III CHAPTER 12 HYDRONIC PIPING ............. 113 Section 1201 General 113 1202 Material 113 1203 Joints and Connections 114 1204 Pipe Insulation 116 1205 Valves 116 1206 Piping Installation 116 1207 Transfer Fluid 117 1208 Tests 117 1209 EmbeddedPipmg 117 1210 Plastic Pipe Ground -source Heat Pump Loop Systems 117 CHAPTER 13 FUEL OIL PIPING AND STORAGE ................. 121 Section 1301 General 121 1302 Material 121 1303 Joints and Connections 121 1304 Piping Support 122 AV 2018 INTERNATIONAL MECHANICAL CODE® " ' C',F'ghtO@Z017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 01jM 10-0 m. oo PAL (PST) L--tto I ( S I.i Agffi,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd ANYVNAVTHORIVED RBPROD VCIION ORDISI—IION LEA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSEAGREEMBNT.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHERBUNDER TABLE OF CONTENTS 1305 Fuel Oil System Installation 122 1306 Oil Gauging 123 1307 Fuel Oil Valves 123 1308 Testing 123 CHAPTER 14 SOLAR THERMAL SYSTEMS .... 125 Section 1401 General 125 1402 Design and Installation 125 1403 Heat Transfer Fluids 127 1404 Labeling 127 CHAPTER 15 REFERENCED STANDARDS ..... 129 APPENDIX A CHIMNEY CONNECTOR PASS-THROUGHS............... 143 APPENDIX B RECOMMENDED PERMIT FEE SCHEDULE ................ 145 INDEX.......................................147 2018 INTERNAT10NAL MECHANICAL CODE® xv I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED A--dby HDOP, Van Cm,(hv dmep ,,d—od Pm),(Qtyof FRmdNmod)O[d6N=b6x10081vms ocJM 10-0 m. oo PAL (PST)p--tto ( I.—A,e^®,AOICC Nof th,,e,od�oamfw ,,e od�o¢tbyany ,dPartyo, AMb�tmPOo�vsd 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER xvi 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( " I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 1 SCOPE AND ADMINISTRATION User note: About this chapter., Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced Chapter 1 is in two parts Part 1—Scope and Application and Part 2—Administration and Enforcement Section 101 identifies what buildings, systems, appliances and equipment fall under its purview and references other 1-Codes as applicable Standards and codes are scoped to the extent referenced The code is intended to be adopted as a legally enforceable document and it cannot be effective without adequate provisions for its adminis- tration and enforcement The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner J_1 A fi M-10io] J =F_10 1 RL1» 4 Wild 0 1010 SECTION 101 GENERAL [A] 101.1 Title. These regulations shall be known as the Mechamcal Code of [NAME OF JURISDICTION], hereinafter referred to as "this code " [A] 101.2 Scope. This code shall regulate the design, installa- tion, maintenance, alteration and inspection of mechanical systems that are permanently installed and utilized to provide control of environmental conditions and related processes within buildings This code shall also regulate those mechani- cal systems, system components, equipment and appliances specifically addressed herein The installation of fuel gas dis- tribution piping and equipment, fuel gas -fired appliances and fuel gas -fired appliance venting systems shall be regulated by the International Fuel Gas Code Exception: Detached one- and two-family dwellings and multiple single-family dwellings (townhouses) not more than three stories high with separate means of egress and their accessory structures shall comply with the Interna- tional Residential Code. [A] 101.2.1 Appendices. Provisions in the appendices shall not apply unless specifically adopted [A] 101.3 Intent. The purpose of this code is to establish minimum standards to provide a reasonable level of safety, health, property protection and public welfare by regulating and controlling the design, construction, installation, quality of materials, location, operation and maintenance or use of mechanical systems [A] 101.4 Severability. If a section, subsection, sentence, clause or phrase of this code is, for any reason, held to be unconstitutional, such decision shall not affect the validity of the remaining portions of this code SECTION 102 APPLICABILITY [A] 102.1 General. Where there is a conflict between a gen- eral requirement and a specific requirement, the specific requirement shall govern Where, in a specific case, different sections of this code specify different materials, methods of construction or other requirements, the most restrictive shall govern [A] 102.2 Existing installations. Except as otherwise pro- vided for in this chapter, a provision in this code shall not require the removal, alteration or abandonment of, nor pre- ventthe continued utilization and maintenance of, a mechani- cal system lawfully in existence at the time of the adoption of this code [A] 102.2.1 Existing buildings. Additions, alterations, renovations or repairs related to building or structural issues shall be regulated by the International Existing Building Code [A] 102.3 Maintenance. Mechanical systems, both existing and new, and parts thereof shall be maintained in proper oper- ating condition inaccordance with the original design and in a safe and sanitary condition Devices or safeguards that are required by this code shall be maintained in compliance with the edition of the code under which they were installed The owner or the owner's authorized agent shall be responsible for maintenance of mechanical systems To determine com- pliance with this provision, the code official shall have the authority to require a mechanical system to be reinspected The inspection for maintenance of HVAC systems shall be performed in accordance with ASHRAE/ACCA/ANSI Stan- dard 180 [A] 102.4 Additions, alterations or repairs. Additions, alterations, renovations or repairs to a mechanical system shall conform to that required for a new mechanical system without requiring the existing mechanical system to comply with all of the requirements of this code Additions, alter- ations or repairs shall not cause an existing mechanical sys- tem to become unsafe, hazardous or overloaded Minor additions, alterations, renovations and repairs to existing mechanical systems shall meet the provisions for new construction, unless such work is done in the same man- ner and arrangement as was in the existing system, is not haz- ardous and is approved [A] 102.5 Change in occupancy. It shall be unlawful to make a change in the occupancy of any structure that will subject the structure to any special provision of this code applicable to the new occupancy without approval The code 2018 INTERNAT10NAL MECHANICAL CODE® 1 I I [ I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dm,xfn dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SCOPE AND ADMINISTRATION official shall certify that such structure meets the intent of the provisions of law governing bwldmg construction for the proposed new occupancy and that such change of occupancy does not result in any hazard to the public health, safety or welfare [A] 102.6 Historic buildings. The provisions of this code relating to the construction, alteration, repair, enlargement, restoration, relocation or moving of buildings or structures shall not be mandatory for existing buildings or structures identified and classified by the state or local jurisdiction as historic buildings where such buildings or structures are judged by the code official to be safe and in the public inter- est of health, safety and welfare regarding any proposed con- struction, alteration, repair, enlargement, restoration, relocation or moving of buildings [A] 102.7 Moved buildings. Except as determined by Sec- tion 102 2, mechanical systems that are a part of buildings or structures moved into or within the jurisdiction shall comply with the provisions of this code for new installations [A] 102.8 Referenced codes and standards. The codes and standards referenced herein shall be those that are listed in Chapter 15 and such codes and standards shall be considered as part of the requirements of this code to the prescribed extent of each such reference and as further regulated in Sec- tions 102 8 1 and 102 8 2 Exception: Where enforcement of a code provision would violate the conditions of the listing of the equipment or appliance, the conditions of the listing and the manufac- turer's installation instructions shall apply [A] 102.8.1 Conflicts. Where conflicts occur between pro- visions of this code and the referenced standards, the pro- visions of this code shall apply [A] 102.8.2 Provisions in referenced codes and stan- dards. Where the extent of the reference to a referenced code or standard includes subject matter that is within the scope of this code, the provisions of this code, as applica- ble, shall take precedence over the provisions in the refer- enced code or standard [A] 102.9 Requirements not covered by this code. Require- ments necessary for the strength, stability or proper operation of an existing or proposed mechanical system, or for the pub- lic safety, health and general welfare, not specifically covered by this code, shall be determined by the code official [A] 102.10 Other laws. The provisions of this code shall not be deemed to nullify any provisions of local, state or federal law [A] 102.11 Application of references. Reference to chapter section numbers, or to provisions not specifically identified by number, shall be construed to refer to such chapter, section or provision of this code PART 2—ADMINISTRATION AND ENFORCEMENT SECTION 103 DEPARTMENT OF MECHANICAL INSPECTION [A] 103.1 General. The department of mechanical inspection is hereby created and the executive official in charge thereof shall be known as the code official [A] 103.2 Appointment. The code official shall be appointed by the chief appointing authority of the jurisdiction [A] 103.3 Deputies. In accordance with the prescribed proce- dures of this jurisdiction and with the concurrence of the appointing authority, the code official shall have the authority to appoint a deputy code official, other related technical offi- cers, inspectors and other employees Such employees shall have powers as delegated by the code official [A] 103.4 Liability. The code official, member of the board of appeals or employee charged with the enforcement of this code, while acting for the jurisdiction in good faith and with- out malice in the discharge of the duties required by this code or other pertinent law or ordinance, shall not thereby be ren- dered civilly or criminally liable personally, and is hereby relieved from personal liability for any damage accruing to persons or property as a result of an act or by reason of an act or omission in the discharge of official duties [A] 103.4.1 Legal defense. Any suit or criminal complaint instituted against any officer or employee because of an act performed by that officer or employee in the lawful discharge of duties and under the provisions of this code shall be defended by the legal representatives of the juris- diction until the final termination of the proceedings The code official or any subordinate shall not be liable for costs in an action, suit or proceeding that is instituted in pursuance of the provisions of this code SECTION 104 DUTIES AND POWERS OF THE CODE OFFICIAL [A] 104.1 General. The code official is hereby authorized and directed to enforce the provisions of this code The code official shall have the authority to render interpretations of this code and to adopt policies and procedures in order to clarify the application of its provisions Such interpretations, policies and procedures shall be in compliance with the intent and purpose of this code Such policies and procedures shall not have the effect of waiving requirements specifically pro- vided for in this code [A] 104.2 Applications and permits. The code official shall receive applications, review construction documents and issue permits for the installation and alteration of mechanical systems, inspect the premises for which such permits have been issued and enforce compliance with the provisions of this code [A] 104.3 Inspections. The code official shall make all of the required inspections, or shall accept reports of inspection by approved agencies or individuals Reports of such inspections shall be in writing and be certified by a responsible officer of such approved agency or by the responsible individual The code official is authorized to engage such expert opinion as deemed necessary to report on unusual technical issues that arise, subject to the approval of the appointing authority [A] 104.4 Right of entry. Where it is necessary to make an inspection to enforce the provisions of this code, or where the code official has reasonable cause to believe that there exists in a building or on any premises any conditions or violations of this code that make the building or premises unsafe, insan- 2018 INTERNATIONAL MECHANICAL CODE® CITFIEItOO2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Dm,(hv dmepf da od min).(Qtyof PnmdNmod)O,d,,N=b¢x100e1vms 01JM IOZM00200 PAL (PST) tto I.i Affiee^®,AOICC Nof th,,e,od,¢,oamfw ,,e od,¢,o¢tbyany ,dPartyo,AMb�tmPOol ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SCOPE AND ADMINISTRATION rtary, dangerous or hazardous, the code official shall have the authority to enter the building or premises at all reasonable times to inspect or to perform the duties unposed on the code official by this code If such building or premises is occupied, the code official shall present credentials to the occupant and request entry If such building or premises is unoccupied, the code official shall first make a reasonable effort to locate the owner, the owner's authorized agent or other person having charge or control of the building or premises and request entry If entry is refused, the code official has recourse to every remedy provided by law to secure entry Where the code official has first obtained a proper mspec- tion warrant or other remedy provided by law to secure entry, the owner, owner's authorized agent or occupant or person having charge, care or control of the building or premises shall not fail or neglect, after proper request is made as herein provided, to promptly permit entry therein by the code offi- cial for the purpose of inspection and examination pursuant to this code [A] 104.5 Identification. The code official shall carry proper identification when inspecting structures or premises in the performance of duties under this code [A] 104.6 Notices and orders. The code official shall issue all necessary notices or orders to ensure compliance with this code [A] 104.7 Department records. The code official shall keep official records of applications received, permits and certifi- cates issued, fees collected, reports of inspections, and notices and orders issued Such records shall be retained in the official records for the period required for retention of public records SECTION 105 APPROVAL [A] 105.1 Modifications. Where there are practical difficul- ties involved in carrying out the provisions of this code, the code official shall have the authority to grant modifications for individual cases upon application of the owner or owner's authorized agent, provided that the code official shall first find that special individual reason makes the strict letter of this code unpractical and the modification is in compliance with the intent and purpose of this code and does not lessen health, life and fire safety requirements The details of action granting modifications shall be recorded and entered in the files of the mechanical inspection department [A] 105.2 Alternative materials, design and methods of construction and equipment. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifi- cally prescribed by this code, provided that any such altema- tive has been approved An alternative material, design or method of construction shall be approved where the code official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, not less than the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, dura- bility and safety Where the alternative material, design or method of construction is not approved, the code official shall respond in writing, stating the reasons why the alternative was not approved [A] 105.2.1 Research reports. Supporting data, where necessary to assist in the approval of materials or assem- blies not specifically provided for in this code, shall con- sist of valid research reports from approved sources [A] 105.3 Required testing. Where there is insufficient evi- dence of compliance with the provisions of this code, or evi- dence that a material or method does not conform to the requirements of this code, or in order to substantiate claims for alternative materials or methods, the code official shall have the authority to require tests as evidence of compliance to be made at no expense to the jurisdiction [A] 105.3.1 Test methods. Test methods shall be as speci- fied in this code or by other recognized test standards In the absence of recognized and accepted test methods, the code official shall approve the testing procedures [A] 105.3.2 Testing agency. Tests shall be performed by an approved agency [A] 105.3.3 Test reports. Reports of tests shall be retained by the code official for the period required for retention of public records [A] 105.4 Approved materials and equipment. Materials, equipment and devices approved by the code official shall be constructed and installed in accordance with such approval [A] 105.5 Material, equipment and appliance reuse. Mate- rials, equipment, appliances and devices shall not be reused unless such elements have been reconditioned, tested and placed in good and proper working condition and approved SECTION 106 PERMITS [A] 106.1 Where required. An owner, owner's authorized agent or contractor who desires to erect, install, enlarge, alter, repair, remove, convert or replace a mechanical system, the installation of which is regulated by this code, or to cause such work to be performed, shall first make application to the code official and obtain the required permit for the work Exception: Where equipment and appliance replacements or repairs must be performed in an emergency situation, the permit application shall be submitted within the next working business day of the department of mechanical inspection [A] 106.1.1 Annual permit. Instead of an individual con- struction permit for each alteration to an already approved system or equipment or application installation, the code official is authorized to issue an annual permit upon appli- cation therefor to any person, firm or corporation regularly employing one or more qualified tradespersons in the building, structure or on the premises owned or operated by the applicant for the permit [A] 106.1.2 Annual permit records. The person to whom an annual permit is issued shall keep a detailed record of alterations made under such annual permit The code offi- 2018 INTERNATIONAL MECHANICAL CODE® 3 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SCOPE AND ADMINISTRATION cial shall have access to such records at all tunes or such records shall be filed with the code official as designated [A] 106.2 Permits not required. Permits shall not be required for the following 1 Portable heating appliances 2 Portable ventilation appliances and equipment 3 Portable cooling units 4 Steam, hot water or chilled water piping within any heating or cooling equipment or appliances regulated by this code 5 The replacement of any minor part that does not alter the approval of equipment or an appliance or make such equipment or appliance unsafe 6 Portable evaporative coolers 7 Self-contained refrigeration systems that contain 10 pounds (4 5 kg) or less of refrigerant, or that are actu- ated by motors of 1 horsepower (0 75 kW) or less 8 Portable fuel cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid Exemption from the permit requirements of this code shall not be deemed to grant authorization for work to be done in violation of the provisions of this code or other laws or ordi- nances of this jurisdiction [A] 106.3 Application for permit. Each application for a permit, with the required fee, shall be filed with the code offi- cial on a form furnished for that purpose and shall contain a general description of the proposed work and its location The application shall be signed by the owner or the owner's authorized agent The permit application shall indicate the proposed occupancy of all parts of the building and of that portion of the site or lot, if any, not covered by the building or structure and shall contain such other information required by the code official [A] 106.3.1 Construction documents. Construction doc- uments, engineering calculations, diagrams and other data shall be submitted in two or more sets with each applica- tion for a permit The code official shall require construc- tion documents, computations and specifications to be prepared and designed by a registered design professional where required by state law Where special conditions exist, the code official is authorized to require additional construction documents to be prepared by a registered design professional Construction documents shall be drawn to scale and shall be of sufficient clarity to indicate the location, nature and extent of the work proposed and show in detail that the work conforms to the provisions of this code Construction documents for buildings more than two stories in height shall indicate where penetrations will be made for mechanical systems, and the materials and methods for maintaining required structural safety, fire - resistance rating and fireblocking Exception: The code official shall have the authority to waive the submission of construction documents, cal- culations or other data if the nature of the work applied for is such that reviewing of construction documents is not necessary to determine compliance with this code [A] 106.3.2 Preliminary inspection. Before a permit is issued, the code official is authorized to inspect and evalu- ate the systems, equipment, buildings, devices, premises and spaces or areas to be used [A] 106.3.3 Time limitation of application. An applica- tion for a permit for any proposed work shall be deemed to have been abandoned 180 days after the date of filing, unless such application has been pursued in good faith or a permit has been issued, except that the code official shall have the authority to grant one or more extensions of tune for additional periods not exceeding 180 days each The extension shall be requested in writing and justifiable cause demonstrated [A] 106.4 Permit issuance. The application, construction documents and other data filed by an applicant for a permit shall be reviewed by the code official If the code official finds that the proposed work conforms to the requirements of this code and all laws and ordinances applicable thereto, and that the fees specified in Section 106 5 have been paid, a per- mit shall be issued to the applicant [A] 106.4.1 Approved construction documents. When the code official issues the permit where construction doc- uments are required, the construction documents shall be endorsed in writing and stamped "APPROVED " Such approved construction documents shall not be changed, modified or altered without authorization from the code official Work shall be done in accordance with the approved construction documents The code official shall have the authority to issue a per- mit for the construction of part of a mechanical system before the construction documents for the entire system have been submitted or approved, provided that adequate information and detailed statements have been filed com- plying with all pertinent requirements of this code The holder of such permit shall proceed at his or her own risk without assurance that the permit for the entire mechanical system will be granted [A] 106.4.2 Validity. The issuance of a permit or approval of construction documents shall not be construed to be a permit for, or an approval of, any violation of any of the provisions of this code or of other ordinances of the juris- diction A permit presuming to give authority to violate or cancel the provisions of this code shall be invalid The issuance of a permit based on construction docu- ments and other data shall not prevent the code official from thereafter requiring the correction of errors in said construction documents and other data or from preventing building operations from being carried on thereunder where in violation of this code or of other ordinances of this jurisdiction [A] 106.4.3 Expiration. Every permit issued by the code official under the provisions of this code shall expire by limitation and become null and void if the work authorized by such permit is not commenced within 180 days from the date of such permit, or if the work authorized by such permit is suspended or abandoned at any time after the work is commenced for a period of 180 days Before such work recommences, a new permit shall be first obtained 2018 INTERNATIONAL MECHANICAL CODE® CopyrightOO2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Dm,(hv dmepf da od min).(Qtyof PnmdNmod)O,d,,N=b¢x100e1vms 01JM IOZM00200 PAL (PST) tto I.i Affiee^®,AOICC Nof th,,e,od,¢,oamfw ,,e od,¢,o¢tbyany ,dpartyo, AMb�tmPOoriud ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SCOPE AND ADMINISTRATION and the fee therefor shall be one-half the amount required for a new pernut for such work, provided that changes have not been made and will not be made in the original construction documents for such work, and provided fur- ther that such suspension or abandonment has not exceeded one year [A] 106.4.4 Extensions. A permittee holding an unexpired permit shall have the right to apply for an extension of the time within which the permittee will commence work under that permit where work is unable to be commenced within the time required by this section for good and satis- factory reasons The code official shall extend the time for action by the permittee for a period not exceeding 180 days if there is reasonable cause A permit shall not be extended more than once The fee for an extension shall be one-half the amount required for a new permit for such work [A] 106.4.5 Suspension or revocation of permit. The code official shall have the authority to suspend or revoke a pernut issued under the provisions of this code wherever the permit is issued in error or on the basis of incorrect, inaccurate or incomplete information, or in violation of any ordinance or regulation or any of the provisions of this code [A] 106.4.6 Retention of construction documents. One set of approved construction documents shall be retained by the code official for a period of not less than 180 days from date of completion of the permitted work, or as required by state or local laws One set of approved con- struction documents shall be returned to the applicant, and said set shall be kept on the site of the bwldmg or]ob at all tunes during which the work authorized thereby is in prog- ress [A] 106.4.7 Previous approvals. This code shall not require changes in the construction documents, construc- tion or designated occupancy of a structure for which a lawful permit has been heretofore issued or otherwise law- fully authorized, and the construction of which has been pursued in good faith within 180 days after the effective date of this code and has not been abandoned [A] 106.4.8 Posting of permit. The pernut or a copy shall be kept on the site of the work until the completion of the project [A] 106.5 Fees. A permit shall not be issued until the fees prescribed in Section 106 5 2 have been paid, nor shall an amendment to a permit be released until the additional fee, if any, due to an increase of the mechanical system, has been paid [A] 106.5.1 Work commencing before permit issuance. Any person who commences work on a mechanical sys- tem before obtaining the necessary permits shall be subject to 100 percent of the usual permit fee in addition to the required permit fees [A] 106.5.2 Fee schedule. The fees for mechanical work shall be as indicated in the following schedule [JURISDICTION TO INSERT APPROPRIATE SCHEDULE] [A] 106.5.3 Fee refunds. The code official shall authorize the refunding of fees as follows 1 The full amount of any fee paid hereunder that was erroneously paid or collected 2 Not more than [SPECIFY PERCENTAGE] percent of the permit fee paid where work has not been done under a permit issued in accordance with this code 3 Not more than [SPECIFY PERCENTAGE] percent of the plan review fee paid where an application for a permit for wluch a plan review fee has been paid is withdrawn or canceled before any plan review effort has been expended The code official shall not authorize the refunding of any fee paid, except upon written application filed by the original permittee not later than 180 days after the date of fee pay- ment SECTION 107 INSPECTIONS AND TESTING [A] 107.1 General. The code official is authorized to conduct such inspections as are deemed necessary to determme com- pliance with the provisions of this code Construction or work for which a permit is required shall be subject to inspection by the code official, and such construction or work shall remain visible and able to be accessed for inspection pur- poses until approved Approval as a result of an inspection shall not be construed to be an approval of a violation of the provisions of this code or of other ordinances of the jurisdic- tion Inspections presuming to give authority to violate or cancel the provisions of this code or of other ordinances of the jurisdiction shall not be valid [A] 107.2 Required inspections and testing. The code offi- cial, upon notification from the pernut holder or the permit holder's agent, shall make the following inspections and other such inspections as necessary, and shall either release that portion of the construction or shall notify the permit holder or the permit holder's agent of violations that must be corrected The holder of the permit shall be responsible for the scheduling of such inspections 1 Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before backfill is put in place Where excavated soil contains rocks, broken concrete, frozen chunks and other rubble that would damage or break the piping or cause corrosive action, clean backfill shall be on the job site 2 Rough -in inspection shall be made after the roof, fram- ing, fireblockmg and bracing are in place and all duct- ing and other components to be concealed are complete, and prior to the installation of wall or ceiling membranes 3 Final inspection shall be made upon completion of the mechanical system Exception: Ground -source heat pump loop systems tested in accordance with Section 1210 10 shall be permuted to be backfilled prior to inspection 2018 INTERNATIONAL MECHANICAL CODE® 5 I I [ I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SCOPE AND ADMINISTRATION The requirements of this section shall not be considered to prohibit the operation of any heating equipment or appliances installed to replace existing heating equipment or appliances serving an occupied portion of a structure provided that a request for inspection of such heating equipment or appli- ances has been filed with the department not more than 48 hours after such replacement work is completed, and before any portion of such equipment or appliances is concealed by any permanent portion of the structure [A] 107.2.1 Other inspections. In addition to the inspec- tions specified in Section 107 2, the code official is autho- rized to make or require other inspections of any construction work to ascertain compliance with the provi- sions of this code and other laws that are enforced [A] 107.2.2 Inspection requests. It shall be the duty of the holder of the permJt or their duly authorized agent to notify the code official when work is ready for inspection It shall be the duty of the permit holder to provide access to and means for inspections of such work that are required by this code [A] 107.2.3 Approval required. Work shall not be done beyond the point indicated in each successive inspection without first obtaining the approval of the code official The code official, upon notification, shall make the requested inspections and shall either indicate the portion of the construction that is satisfactory as completed, or notify the permtt holder or his or her agent wherein the same falls to comply with this code Any portions that do not comply shall be corrected and such portion shall not be covered or concealed until authorized by the code official [A] 107.2.4 Approved inspection agencies. The code official is authorized to accept reports of approved agen- cies, provided that such agencies satisfy the requirements as to qualifications and reliability [A] 107.2.5 Evaluation and follow-up inspection ser- vices. Prior to the approval of a prefabricated construction assembly having concealed mechanical work and the issu- ance of a mechanical permit, the code official shall require the submittal of an evaluation report on each prefabricated construction assembly, indicating the complete details of the mechanical system, including a description of the sys- tem and its components, the basis on which the system is being evaluated, test results and similar information, and other data as necessary for the code official to determine conformance to this code [A] 107.2.5.1 Evaluation service. The code official shall designate the evaluation service of an approved agency as the evaluation agency, and review such agency's evaluation report for adequacy and confor- mance to this code [A] 107.2.5.2 Follow-up inspection. Except where ready access is provided to mechanical systems, service equipment and accessories for complete inspection at the site without disassembly or dismantling, the code official shall conduct the in -plant inspections as fre- quently as necessary to ensure conformance to the approved evaluation report or shall designate an inde- pendent, approved inspection agency to conduct such inspections The inspection agency shall furnish the code official with the follow-up inspection manual and a report of inspections on request, and the mechanical system shall have an identifying label permanently affixed to the system indicating that factory inspections have been performed [A] 107.2.5.3 Test and inspection records. Required test and inspection records shall be available to the code official at all times during the fabrication of the mechanical system and the erection of the building, or such records as the code official designates shall be filed [A] 107.3 Testing. Mechanical systems shall be tested as required in this code and in accordance with Sections 107 3 1 through 107 3 3 Tests shall be made by the permJt holder and observed by the code official [A] 107.3.1 New, altered, extended or repaired systems. New mechanical systems and parts of existing systems, which have been altered, extended, renovated or repaired, shall be tested as prescribed herein to disclose leaks and defects [A] 107.3.2 Apparatus, material and labor for tests. Apparatus, material and labor required for testing a mechanical system or part thereof shall be furnished by the permit holder [A] 107.3.3 Reinspection and testing. Where any work or installation does not pass an initial test or inspection, the necessary corrections shall be made so as to achieve com- pliance with this code The work or installation shall then be resubmitted to the code official for inspection and test- ing [A] 107.4 Approval. After the prescribed tests and inspec- tions indicate that the work complies in all respects with this code, a notice of approval shall be issued by the code official [A] 107.4.1 Revocation. The code official is authorized to, in writing, suspend or revoke a notice of approval issued under the provisions of this code wherever the notice is issued in error, on the basis of incorrect informa- tion supplied, or where it is determined that the building or structure, premise or portion thereof is in violation of any ordinance or regulation or any of the provisions of this code [A] 107.5 Temporary connection. The code official shall have the authority to authorize the temporary connection of a mechanical system to the sources of energy for the purpose of testing mechanical systems or for use under a temporary cer- tificate of occupancy [A] 107.6 Connection of service utilities. A person shall not make connections from a utility, source of energy, fuel or power to any building or system that is regulated by this code for which a permit is required, until authorized by the code official SECTION 108 VIOLATIONS [A] 108.1 Unlawful acts. It shall be unlawful for a person, firm or corporation to erect, construct, alter, repair, remove, 2018 INTERNATIONAL MECHANICAL CODE® CopyrightOO2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Dm,(hv dmepf da od min).(Qtyof PnmdNmod)O,d,,N=b¢x100e1vms 01JM IOZM00200 PAL (PST)p­tto I.—Ag,, ^®,AOICC Nof th,,e,od,¢,oamfw ,,e od,¢,o¢tbyany ,dPartyo, AMb�tmPOol ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SCOPE AND ADMINISTRATION demolish or utilize a mechanical system, or cause same to be done, in conflict with or in violation of any of the provisions of this code [A] 108.2 Notice of violation. The code official shall serve a notice of violation or order to the person responsible for the erection, installation, alteration, extension, repair, removal or demolition of mechanical work in violation of the provisions of this code, or in violation of a detail statement or the approved construction documents thereunder, or in violation of a permit or certificate issued under the provisions of this code Such order shall direct the discontinuance of the illegal action or condition and the abatement of the violation [A] 108.3 Prosecution of violation. If the notice of violation is not complied with promptly, the code official shall request the legal counsel of the jurisdiction to institute the appropri- ate proceeding at law or in equity to restrain, correct or abate such violation, or to require the removal or term mation of the unlawful occupancy of the structure in violation of the provi- sions of this code or of the order or direction made pursuant thereto [A] 108.4 Violation penalties. Persons who shall violate a provision of this code or shall fall to comply with any of the requirements thereof or who shall erect, install, alter or repair mechanical work in violation of the approved construction documents or directive of the code official, or of a perunt or certificate issued under the provisions of this code, shall be guilty of a [SPECIFY OFFENSE], punishable by a fine of not more than [AMOUNT] dollars or by imprisonment not exceed - mg [NUMBER OF DAYS], or both such fine and imprisonment Each day that a violation continues after due notice has been served shall be deemed a separate offense [A] 108.5 Stop work orders. Upon notice from the code offi- cial that mechanical work is being performed contrary to the provisions of this code or in a dangerous or unsafe manner, such work shall immediately cease Such notice shall be in writing and shall be given to the owner of the property, or to the owner's authorized agent, or to the person doing the work The notice shall state the conditions under which work is authorized to resume Where an emergency exists, the code official shall not be required to give a written notice prior to stopping the work Any person who shall continue any work on the system after having been served with a stop work order, except such work as that person is directed to perform to remove a violation or unsafe condition, shall be liable for a fine of not less than [AMOUNT] dollars or more than [AMOUNT] dollars [A] 108.6 Abatement of violation. The imposition of the penalties herein prescribed shall not preclude the legal officer of the jurisdiction from instituting appropriate action to pre- vent unlawful construction or to restrain, correct or abate a violation, or to prevent illegal occupancy of a building, struc- ture or premises, or to stop an illegal act, conduct, business or utilization of the mechanical system on or about any prem- ises [A] 108.7 Unsafe mechanical systems. A mechanical system that is unsafe, constitutes a fire or health hazard, or is other- wise dangerous to human life, as regulated by this code, is hereby declared as an unsafe mechanical system Use of a mechanical system regulated by this code constituting a haz- ard to health, safety or welfare by reason of inadequate main- tenance, dilapidation, fire hazard, disaster, damage or abandonment is hereby declared an unsafe use Such unsafe equipment and appliances are hereby declared to be a public nuisance and shall be abated by repair, rehabilitation, demoli- tion or removal [A] 108.7.1 Authority to condemn mechanical systems. Where the code official determmes that any mechanical system, or portion thereof, regulated by this code has become hazardous to life, health, property, or has become insanitary, the code official shall order in writing that such system either be removed or restored to a safe condition A time limit for compliance with such order shall be speci- fied in the written notice A person shall not use or main- tain a defective mechanical system after receiving such notice Where such mechanical system is to be disconnected, written notice as prescribed in Section 108 2 shall be given In cases of immediate danger to life or property, such disconnection shall be made immediately without such notice [A] 108.7.2 Authority to order disconnection of energy sources. The code official shall have the authority to order disconnection of energy sources supplied to a building, structure or mechanical system regulated by this code, where it is determined that the mechanical system or any portion thereof has become hazardous or unsafe Written notice of such order to disconnect service and the causes therefor shall be given within 24 hours to the owner, the owner's authorized agent and occupant of such building, structure or premises, provided, however, that in cases of immediate danger to life or property, such disconnection shall be made immediately without such notice Where energy sources are provided by a public utility, the code official shall immediately notify the serving utility in writ- ing of the issuance of such order to disconnect [A] 108.7.3 Connection after order to disconnect. A person shall not make energy source connections to mechanical systems regulated by this code that have been disconnected or ordered to be disconnected by the code official, or the use of which has been ordered to be discon- tinued by the code official until the code official autho- rizes the reconnection and use of such mechanical systems Where a mechanical system is maintained in violation of this code, and in violation of a notice issued pursuant to the provisions of this section, the code official shall insti- tute appropriate action to prevent, restrain, correct or abate the violation SECTION 109 MEANS OF APPEAL [A] 109.1 Application for appeal. A person shall have the right to appeal a decision of the code official to the board of appeals An application for appeal shall be based on a claim that the true intent of this code or the rules legally adopted thereunder have been incorrectly interpreted, the provisions of this code do not fully apply, or an equally good or better 2018 INTERNATIONAL MECHANICAL CODE® 7 I I [ I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SCOPE AND ADMINISTRATION form of construction is proposed The application shall be filed on a form obtained from the code official within 20 days after the notice was served [A] 109.1.1 Limitation of authority. The board of appeals shall not have authority relative to interpretation of the administration of this code nor shall such board be empowered to waive requirements of this code [A] 109.2 Membership of board. The board of appeals shall consist of five members appointed by the chief appointing authority as follows one for 5 years, one for 4 years, one for 3 years, one for 2 years, and one for 1 year Thereafter, each new member shall serve for 5 years or until a successor has been appointed [A] 109.2.1 Qualifications. The board of appeals shall consist of five individuals, one from each of the following professions or disciplines 1 Registered design professional who is a registered architect, or a builder or superintendent of building construction with not less than 10 years' experience, 5 of which shall have been in responsible charge of work 2 Registered design professional with structural engi- neering or arclutectural experience 3 Registered design professional with mechanical and plumbing engineering experience, or a mechanical contractor with not less than 10 years' experience, 5 of which shall have been in responsible charge of work 4 Registered design professional with electrical engi- neering experience, or an electrical contractor with not less than 10 years' experience, 5 of which shall have been in responsible charge of work 5 Registered design professional with fire protection engineering experience, or a fire protection contrac- tor with not less than 10 years' experience, 5 of which shall have been in responsible charge of work [A] 109.2.2 Alternate members. The chief appointing authority shall appoint two alternate members who shall be called by the board chairman to hear appeals during the absence or disqualification of a member Alternate mem- bers shall possess the qualifications required for board membership and shall be appointed for 5 years, or until a successor has been appointed [A] 109.2.3 Chairman. The board shall annually select one of its members to serve as chairman [A] 109.2.4 Disqualification of member. A member shall not hear an appeal in which that member has a personal, professional or financial interest [A] 109.2.5 Secretary. The chief administrative officer shall designate a qualified clerk to serve as secretary to the board The secretary shall file a detailed record of all pro- ceedmgs in the office of the chief administrative officer [A] 109.2.6 Compensation of members. Compensation of members shall be determined by law [A] 109.3 Notice of meeting. The board shall meet upon notice from the chairman, within 10 days of the filing of an appeal, or at stated periodic meetings [A] 109.4 Open hearing. Hearings before the board shall be open to the public The appellant, the appellant's representa- tive, the code official and any person whose interests are affected shall be given an opportunity to be heard [A] 109.4.1 Procedure. The board shall adopt and make available to the public through the secretary procedures under which a hearing will be conducted The procedures shall not require compliance with strict rules of evidence, but shall mandate that only relevant information be received [A] 109.5 Postponed hearing. When five members are not present to hear an appeal, either the appellant or the appel- lant's representative shall have the right to request a post- ponement of the hearing [A] 109.6 Board decision. The board shall modify or reverse the decision of the code official by a concurring vote of three members [A] 109.6.1 Resolution. The decision of the board shall be by resolution Certified copies shall be furnished to the appellant and to the code official [A] 109.6.2 Administration. The code official shall take immediate action in accordance with the decision of the board [A] 109.7 Court review. Any person, whether or not a previ- ous party of the appeal, shall have the right to apply to the appropriate court for a writ of certiorari to correct errors of law Application for review shall be made in the manner and time required by law following the filing of the decision in the office of the chief administrative officer SECTION 110 TEMPORARY EQUIPMENT, SYSTEMS AND USES [A] 110.1 General. The code official is authorized to issue a permit for temporary equipment, systems and uses Such per- mits shall be limited as to time of service, but shall not be permitted for more than 180 days The code official is autho- rized to grant extensions for demonstrated cause [A] 110.2 Conformance. Temporary equipment, systems and uses shall conform to the structural strength, fire safety, means of egress, accessibility, light, ventilation and sanitary requirements of this code as necessary to ensure the public health, safety and general welfare [A] 110.3 Temporary utilities. The code official is autho- rized to give permission to temporarily supply utilities before an installation has been fully completed and the final certifi- cate of completion has been issued The part covered by the temporary certificate shall comply with the requirements specified for temporary lighting, heat or power in the code [A] 110.4 Termination of approval. The code official is authorized to terminate such permit for temporary equipment, systems or uses and to order the temporary equipment, sys- tems or uses to be discontinued 2018 INTERNATIONAL MECHANICAL CODE® CopyrightOO2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Dm,(hv dmepf da od min).(Qtyof PnmdNmod)O,d,,N=b¢x100e1vms 01JM IOZM00200 PAL (PST) T­tto I.—Ag,, ^®,AOICC Nof th,,e,od,¢,oamfw ,,e od,¢,o¢tbyany ,dpartyo, AMb�tmPOoriud ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER CHAPTER 2 DEFINITIONS User note: About this chapter., Codes, by their very nature, are technical documents. Every word, term and punctuation mark can add to or change the meaning of a technical requirement It is necessary to maintain a consensus on the specific meaning of each term contained in the code. Chapter 2 performs this function bystating clearly whatspecific terms mean for the purposes of the code. SECTION 201 GENERAL 201.1 Scope. Unless otherwise expressly stated, the follow- ing words and terms shall, for the purposes of this code, have the meanings indicated in this chapter 201.2 Interchangeability. Words used in the present tense include the future, words in the masculine gender include the femmme and neuter, the singular number includes the plural and the plural, the singular 201.3 Terms defined in other codes. Where terms are not defined in this code and are defined in the International Building Code, International Fire Code, International Fuel Gas Code or the International Plumbing Code, such terms shall have meanings ascribed to them as in those codes 201.4 Terms not defined. Where terms are not defined through the methods authorized by this section, such terms shall have ordinarily accepted meanings such as the context implies SECTION 202 GENERAL DEFINITIONS ABRASIVE MATERIALS. Moderately abrasive particulate in high concentrations, and highly abrasive particulate in moderate and high concentrations, such as alumina, bauxite, iron silicate, sand and slag ABSORPTION SYSTEM. A refrigerating system in which refrigerant is pressurized by pumping a chemical solution of refrigerant in absorbent, and then separated by the addition of heat in a generator, condensed (to reject heat), expanded, evaporated (to provide refrigeration), and reabsorbed in an absorber to repeat the cycle, the system can be single or mul- tiple effect, the latter using multiple stages or internally cas- caded use of heat to improve efficiency ACCESS (TO). That which enables a device, appliance or equipment to be reached by ready access or by a means that first requires the removal or movement of a panel or similar obstruction [see also "Ready access (to)"] AIR. Air supplied to mechanical equipment and appliances for combustion, ventilation, cooling and similar purposes Standard air is air at standard temperature and pressure, namely, 70°F (21°C) and 2992 inches of mercury (1013 kPa) AIR CONDITIONING. The treatment of air so as to control simultaneously the temperature, humidity, cleanness and dis- tribution of the air to meet the requirements of a conditioned space AIR-CONDITIONING SYSTEM. A system that consists of heat exchangers, blowers, filters, supply, exhaust and return ducts, and shall include any apparatus installed in con- nection therewith AIR DISPERSION SYSTEM. Any diffuser system designed to both convey au within a room, space or area and diffuse air into that space while operating under positive pres- sure Systems are commonly constructed of, but not limited to, fabric or plastic film AIR DISTRIBUTION SYSTEM. Any system of ducts, ple- nums and air -handling equipment that circulates au within a space or spaces and includes systems made up of one or more air -handling units AIR, EXHAUST. Air being removed from any space, appli- ance or piece of equipment and conveyed directly to the atmosphere by means of openings or ducts AIR -HANDLING UNIT. A blower or fan used for the pur- pose of distributing supply air to a room, space or area AIR, MAKEUP. Any combination of outdoor and transfer air intended to replace exhaust air and exfiltration AIR, OUTDOOR. Ambient air that enters a building through a ventilation system, through intentional openings for natural ventilation, or by infiltration AIR, TRANSFER. Air moved from one indoor space to another [A] ALTERATION. A change in a mechanical system that involves an extension, addition or change to the arrangement, type or purpose of the original installation APPLIANCE. A device or apparatus that is manufactured and designed to utilize energy and for which this code pro- vides specific requirements APPLIANCE, EXISTING. Any appliance regulated by this code that was legally installed prior to the effective date of this code, or for which a permit to install has been issued APPLIANCE TYPE. High -heat appliance. Any appliance in which the prod- ucts of combustion at the point of entrance to the flue under normal operating conditions have a temperature greater than 2,000°F (1093°C) Low -heat appliance (residential appliance). Any appli- ance in which the products of combustion at the point of entrance to the flue under normal operating conditions have a temperature of 1,000°F (538°C) or less 2018 INTERNATIONAL MECHANICAL CODE® 9 I I 1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)pu, tto ( I.i Ar,e^ ,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DEFINITIONS Medium -heat appliance. Any appliance in which the products of combustion at the point of entrance to the flue under normal operating conditions have a temperature of more than 1,000°F (538°C), but not greater than 2,000°F (1093°C) APPLIANCE, VENTED. An appliance designed and installed in such a manner that all of the products of combus- tion are conveyed directly from the appliance to the outdoor atmosphere through an approved chimney or vent system [A] APPROVED. Acceptable to the code official [A] APPROVED AGENCY. An established and recognized agency that is regularly engaged in conducting tests, furnish- ing inspection services or furnishing product certification where such agency has been approved by the code official AUTOMATIC BOILER. Any class of boiler that is equipped with the controls and limit devices specified in Chapter 10 BATHROOM. A room containing a bathtub, shower, spa or similar bathing fixture BOILER. A closed heating appliance intended to supply hot water or steam for space heating, processing or power pur- poses Low-pressure boilers operate at pressures less than or equal to 15 pounds per square inch (psi) (103 kPa) for steam and 160 psi (1103 kPa) for water High-pressure boilers oper- ate at pressures exceeding those pressures BOILER ROOM. A room primarily utilized for the installa- tion of a boiler BRAZED JOINT. A gas -tight joint obtained by the joining of metal parts with metallic mixtures or alloys that melt at a temperature above 1,000°F (538°C), but lower than the melt- ing temperature of the parts to be Iomed BRAZING. A metal joining process wherein coalescence is produced by the use of a nonferrous filler metal having a melting point above 1,000°F (538°C), but lower than that of the base metal being joined The filler material is distributed between the closely fitted surfaces of the joint by capillary attraction BREATHING ZONE. The region within an occupied space between planes 3 and 72 inches (76 and 1829 mm) above the floor and more than 2 feet (610 mm) from the walls of the space or from fixed air-conditioning equipment BTU. Abbreviation for British thermal unit, which is the quantity of heat required to raise the temperature of 1 pound (454 g) of water 1 °F (0 56°C) (1 Btu = 1055 J) ' [A] BUILDING. Any structure utilized or intended for sup- porting or sheltering any occupancy [BF] CEILING RADIATION DAMPER. A listed device installed in a ceiling membrane of a fire -resistance -rated floor/ceiling or roof/ceilmg assembly to limit automatically the radiative heat transfer through an air inlet/outlet opening CHIMNEY. A primarily vertical structure containing one or more flues, for the purpose of carrying gaseous products of combustion and air from a fael-burning appliance to the out- door atmosphere Factory -built chimney. A listed and labeled chimney composed of factory -made components, assembled in the field in accordance with manufacturer's instructions and the conditions of the listing Masonry chimney. A field -constructed chimney com- posed of solid masonry units, bricks, stones or concrete Metal chimney. A field -constructed chimney of metal CHIMNEY CONNECTOR. A pipe that connects a fael- buming appliance to a chimney CLEARANCE. The minimum distance through air mea- sured between the heat -producing surface of the mechanical appliance, device or equipment and the surface of the com- bustible material or assembly CLOSED COMBUSTION SOLID -FUEL -BURNING APPLIANCE. A heat -producing appliance that employs a combustion chamber that does not have openings other than the flue collar, fuel charging door and adjustable openings provided to control the amount of combustion air that enters the combustion chamber CLOTHES DRYER. An appliance used to dry wet laundry by means of heat [A] CODE. These regulations, subsequent amendments thereto, or any emergency rule or regulation that the adminis- trative authority having jurisdiction has lawfully adopted [A] CODE OFFICIAL. The officer or other designated authority charged with the admmistration and enforcement of this code, or a duly authorized representative [BF] COMBINATION FIRE/SMOKE DAMPER. A listed device installed in ducts and air transfer openings designed to close automatically upon the detection of heat and resist the passage of flame and smoke The device is installed to oper- ate automatically, be controlled by a smoke detection system, and where required, is capable of being positioned from a fire command center COMBUSTIBLE ASSEMBLY. Wall, floor, ceiling or other assembly constructed of one or more component materials that are not defined as noncombustible [F] COMBUSTIBLE LIQUID. A liquid having a closed cup flash point at or above 100°F (38°C) Combustible liquids shall be subdivided as follows Class H. Liquids having a closed cup flash point at or above 100°F (38°C) and below 140°F (60°C) Class IIIA. Liquids having a closed cup flash point at or above 140°F (60°C) and below 200°F (93°C) Class IIIB. Liquids having a closed cup flash point at or above 200°F (93°C) The category of combustible liquids does not include com- pressed gases or cryogenic fluids COMBUSTIBLE MATERIAL. Any material not defined as noncombustible COMBUSTION. In the context of this code, refers to the rapid oxidation of fuel accompamed by the production of heat or heat and light COMBUSTION AIR. Air necessary for complete combus- tion of a fuel, including theoretical air and excess air 10 2018 INTERNATIONAL MECHANICAL CODE® 11 1 Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf dwood mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( I.i Agffi,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER DEFINITIONS COMBUSTION CHAMBER. The portion of an appliance within which combustion occurs COMBUSTION PRODUCTS. Constituents resulting from the combustion of a fuel with the oxygen of the air, including the inert gases, but excluding excess air COMMERCIAL COOKING APPLIANCES. Appliances used in a commercial food service establishment for heating or cooking food For the purpose of this definition, a com- mercial food service establishment is where food is prepared for sale or is prepared on a scale that is by volume and fre- quency not representative of domestic household cooking COMMERCIAL COOKING RECIRCULATING SYS- TEM. Self-contained system consisting of the exhaust hood, the cooking equipment, the filters and the fire suppression system The system is designed to capture cooking vapors and residues generated from commercial cooking equipment The system removes contaminants from the exhaust air and recirculates the air to the space from which it was withdrawn COMMERCIAL KITCHEN HOODS. Backshelf hood. A backshelf hood is also referred to as a low -proximity hood, or as a sidewall hood where wall mounted Its front lower hp is low over the apphance(s) and is "set back" from the front of the appliance(s) It is always closed to the rear of the appliances by a panel where free-standing, or by a panel or wall where wall mounted, and its height above the cooking surface varies (This style of hood can be constructed with partial end panels to increase its effectiveness in capturing the efflu- ent generated by the cooking operation) Double island canopy hood. A double island canopy hood is placed over back-to-back appliances or appliance Imes It is open on all sides and overhangs both fronts and the sides of the apphance(s) It could have a wall panel between the backs of the appliances (The fact that exhaust air is drawn from both sides of the double canopy to meet in the center causes each side of this hood to emulate a wall canopy hood, and thus it functions much the same with or without an actual wall panel between the backs of the appliances) Eyebrow hood. An eyebrow hood is mounted directly to the face of an appliance, such as an oven and dishwasher, above the opening(s) or door(s) from which effluent is emitted, extending past the sides and overhanging the front of the opening to capture the effluent Pass -over hood. A pass -over hood is a free-standing form of a backshelf hood constructed low enough to pass food over the top Single island canopy hood. A single island canopy hood is placed over a single appliance or appliance line It is open on all sides and overhangs the front, rear and sides of the apphance(s) A single island canopy is more suscepti- ble to cross drafts and requires a greater exhaust air flow than an equivalent sized wall -mounted canopy to capture and contain effluent generated by the cooking opera- tion(s) Wall canopy hood. A wall canopy exhaust hood is mounted against a wall above a single appliance or line of apphance(s), or it could be free-standing with a back panel from the rear of the appliances to the hood It overhangs the front and sides of the apphance(s) on all open sides The wall acts as a back panel, forcing the makeup air to be drawn across the front of the cooking equipment, thus increasing the effectiveness of the hood to capture and contain effluent generated by the cooking operation(s) COMPENSATING HOODS. Compensating hoods are those having integral (built-in) makeup air supply The makeup air supply for such hoods is generally supplied from short-circuit flow from inside the hood, air curtain flow from the bottom of the front face, and front face discharge from the outside front wall of the hood The compensating makeup air- flow can also be supplied from the rear or side of the hood, or the rear, front or sides of the cooking equipment The makeup airflow can be one or a combination of methods COMPRESSOR. A specific machine, with or without acces- sories, for compressing a gas COMPRESSOR, POSITIVE DISPLACEMENT. A com- pressor in which increase in pressure is attained by changing the internal volume of the compression chamber COMPRESSOR UNIT. A compressor with its prime mover and accessories CONCEALED LOCATION. A location that cannot be accessed without damaging permanent parts of the building structure or finish surface Spaces above, below or behind readily removable panels or doors shall not be considered as concealed CONDENSATE. The liquid that condenses from a gas (including flue gas) caused by a reduction in temperature CONDENSER. A heat exchanger designed to liquefy refrig- erant vapor by removal of heat CONDENSING UNIT. A specific refrigerating machine combination for a given refrigerant, consisting of one or more power -driven compressors, condensers and, where required, liquid receivers, and the regularly furnished accessories CONDITIONED SPACE. An area, room or space that is enclosed within the building thermal envelope and that is directly heated or cooled or that is indirectly heated or cooled Spaces are indirectly heated or cooled where they communi- cate through openings with conditioned spaces, where they are separated from conditioned spaces by uninsulated walls, floors or ceilings, or where they contain unmsulated ducts, piping or other sources of heating or cooling [A] CONSTRUCTION DOCUMENTS. The written, graphic and pictorial documents prepared or assembled for describing the design, location and physical characteristics of the elements of the project necessary for obtaining a building permit The construction drawings shall be drawn to an appropriate scale CONTROL. A manual or automatic device designed to regu- late the gas, air, water or electrical supply to, or operation of, a mechanical system CONVERSION BURNER. A burner designed to supply gaseous fuel to an appliance originally designed to utilize another fuel 2018 INTERNATIONAL MECHANICAL CODE® 11 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.i—Ag,, ^®,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DEFINITIONS COOKING APPLIANCE. See "Commercial cooling appli- ances " DAMPER. A manually or automatically controlled device to regulate draft or the rate of flow of air or combustion gases Volume damper. A device that, where installed, will restrict, retard or direct the flow of air in a duct, or the products of combustion in a heat -producing appliance, its vent connector, vent or chimney therefrom [BS] DESIGN FLOOD ELEVATION. The elevation of the "design flood," including wave height, relative to the datum specified on the community's legally designated flood hazard area map In areas designated as Zone AO, the design flood elevation shall be the elevation of the highest existing grade of the building's perimeter plus the depth number, in feet, specified on the flood hazard map In areas designated as Zone AO where a depth number is not specified on the map, the depth number shall be taken as being equal to 2 feet (610 mm) DESIGN WORKING PRESSURE. The maximum allow- able working pressure for which a specific part of a system is designed DIRECT REFRIGERATION SYSTEM. A system in which the evaporator or condenser of the refrigerating system is in direct contact with the air or other substances to be cooled or heated IDIRECT SOLAR SYSTEM. A solar thermal system in which the gas or liquid in the solar collector loop is not sepa- rated from the load [FG] DIRECT -VENT APPLIANCES. Appliances that are constructed and installed so that all air for combustion is derived from the outdoor atmosphere and all flue gases are discharged to the outdoor atmosphere DISCRETE PRODUCT. Products that are noncontmuous, individual, distinct pieces such as, but not limited to, electri- cal, plumbing and mechanical products and duct straps, duct fittings, duct registers and pipe hangers DRAFT. The pressure difference existing between the appli- ance or any component part and the atmosphere, that causes a continuous flow of air and products of combustion through the gas passages of the appliance to the atmosphere Induced draft. The pressure difference created by the action of a fan, blower or ejector, that is located between the appliance and the chimney or vent termination Natural draft. The pressure difference created by a vent or chimney because of its height, and the temperature dif- ference between the flue gases and the atmosphere IDRAIN -BACK SYSTEM. A solar thermal system in which the fluid in the solar collector loop is gravity drained from the collector into a holding tank under prescribed circumstances DRIP. The container placed at a low point in a system of pip- ing to collect condensate and from which the condensate is removable DRY CLEANING SYSTEMS. Dry cleaning plants or sys- tems are classified as follows Type I. Those systems using Class I flammable liquid sol- vents having a flash point below 100°F (38°C) Type II. Those systems using Class II combustible liquid solvents having a flash point at or above 100°F (38°C) and below 140°F (60°C) Type III. Those systems using Class III combustible liq- uid solvents having a flash point at or above 140°F (60°C) Types IV and V. Those systems using Class IV nonflam- mable liquid solvents DUCT. A tube or conduit utilized for conveying air The air passages of self-contained systems are not to be construed as air ducts DUCT FURNACE. A warm -air furnace normally installed in an air distribution duct to supply warm air for heating This definition shall apply only to a warm -air heating appliance that, for air circulation, depends on a blower not furnished as part of the furnace DUCT SYSTEM. A continuous passageway for the trans- mission of air that, in addition to ducts, includes duct fittings, dampers, plenums, fans and accessory au-handlmg equip- ment and appliances DUCTLESS MINI -SPLIT SYSTEM. A heating and cool- ing system that is comprised of one or multiple indoor evapo- rator/air-handling units and an outdoor condensing unit that is connected by refrigerant piping and electrical wiring A duct- less mini -split system is capable of cooling or heating one or more rooms without the use of a traditional ductwork system [BG] DWELLING. A building or portion thereof that con- tains not more than two dwelling units [A] DWELLING UNIT. A single unit providing complete, independent living facilities for one or more persons, mclud- mg permanent provisions for living, sleeping, eating, cooking and sanitation ELECTRIC HEATING APPLIANCE. An appliance that produces heat energy to create a warm environment by the application of electric power to resistance elements, refriger- ant compressors or dissimilar material junctions ENERGY RECOVERY VENTILATION SYSTEM. Sys- tems that employ air-to-air heat exchangers to recover energy from or reject energy to exhaust air for the purpose of pre- heating, precoolmg humidifying or dehumidifying outdoor ventilation air prior to supplying such air to a space, either directly or as part of an HVAC system ENVIRONMENTAL AIR. Air that is conveyed to or from occupied areas through ducts that are not part of the heating or air-conditioning system, such as ventilation for human usage, domestic kitchen range exhaust, bathroom exhaust, domestic clothes dryer exhaust and parking garage exhaust EQUIPMENT. Piping, ducts, vents, control devices and other components of systems other than appliances that are permanently installed and integrated to provide control of environmental conditions for buildings This definition shall also include other systems specifically regulated in this code EQUIPMENT, EXISTING. Any equipment regulated by this code which was legally installed prior to the effective date of this code, or for which a permit to install has been issued 12 2018 INTERNATIONAL MECHANICAL CODE® C1pynEhtOo2.0I7ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) tto S I ( I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER DEFINITIONS EVAPORATIVE COOLER. A device used for reducing the sensible heat of air for cooling by the process of evaporation of water into an airstream EVAPORATIVE COOLING SYSTEM. The equipment and appliances intended or installed for the purpose of envi- ronmental cooling by an evaporative cooler from which the conditioned air is distributed through ducts or plenums to the conditioned area EVAPORATOR. That part of the system in which liquid refrigerant is vaporized to produce refrigeration EXCESS AIR. The amount of au provided in addition to the- oretical air to achieve complete combustion of a fuel, thereby preventing the formation of dangerous products of combus- tion EXFILTRATION. Uncontrolled outward air leakage from conditioned spaces through unintentional openings in ceil- ings, floors and walls to unconditioned spaces or the outdoors caused by pressure differences across these openings result - mg from wind, the stack effect created by temperature differ- ences between mdoors and outdoors, and imbalances between supply and exhaust airflow rates EXHAUST SYSTEM. An assembly of connected ducts, ple- nums, fittings, registers, grilles and hoods through which air is conducted from the space or spaces and exhausted to the outdoor atmosphere EXTRA -HEAVY-DUTY COOKING APPLIANCE. Extra -heavy-duty cooking appliances are those utilizing open flame combustion of solid fuel at any time [BF] FIRE DAMPER. A listed device installed in ducts and air transfer openings designed to close automatically upon detection of heat and to restrict the passage of flame Fire dampers are classified for use in either static systems that will automatically shut down in the event of a fire, or in dynamic systems that continue to operate during a fire A dynamic fire damper is tested and rated for closure under elevated tem- perature airflow FIREPLACE. An assembly consisting of a hearth and fire chamber of noncombustible material and provided with a chimney, for use with solid fuels Factory -built fireplace. A listed and labeled fireplace and chimney system composed of factory -made compo- nents, and assembled in the field in accordance with man- ufacturer's instructions and the conditions of the listing Masonry fireplace. A field -constructed fireplace com- posed of solid masonry units, bricks, stones or concrete FIREPLACE STOVE. A free-standing chimney -connected solid-fuel-bummg heater, designed to be operated with the fire chamber doors in either the open or closed position [FG] FLAME SAFEGUARD. A device that will automati- cally shut off the fuel supply to a main burner or group of burners when the means of ignition of such burners becomes inoperative, and when flame failure occurs on the burner or group of burners [BF] FLAME SPREAD INDEX. The numerical value assigned to a material tested in accordance with ASTM E 84 or UL 723 FLAMMABILITY CLASSIFICATION. Refrigerants shall be assigned to one of the three classes 1, 2 or 3-in accor- dance with ASHRAE 34 For Classes 2 and 3, the heat of combustion shall be calculated assuming that combustion products are in the gas phase and in their most stable state Class 1. Refrigerants that do not show flame propagation when tested in air at 14 7 psia (101 kPa) and 140°F (60°C) Class 2. Refrigerants having a lower flammability limit (LFL) of more than 0 00625 pound per cubic foot (0 10 kg/ml) at 140OF (60°C) and 14 7 psia (101 kPa) and a heat of combustion of less than 8169 Btu/lb (19 000 kJ/kg) Class 3. Refrigerants that are highly flammable, having a LFL of less than or equal to 0 00625 pound per cubic foot (0 10 kg/m') atl40-F (60°C) and 14 7 psia (101 kPa) or a heat of combustion greater than or equal to 8169 Btu/lb (19 000 kJ/kg) [F] FLAMMABLE LIQUIDS. Any liquid that has a flash point below 100°F (380C), and has a vapor pressure not exceeding 40 psia (276 kPa) at 100°F (38°C) Flammable liq- uids shall be known as Class I liquids and shall be divided into the following classifications Class IA. Liquids having a flash point below 730F (23°C) and a boiling point below 100°F (38°C) Class IB. Liquids having a flash point below 73°F (23°C) and a boiling point at or above 100°F (38°C) Class IC. Liquids having a flash point at or above 73°F (23°C) and below 100°F (38°C) [F] FLAMMABLE VAPOR OR FUMES. Mixtures of gases in air at concentrations equal to or greater than the LFL and less than or equal to the upper flammability limit (UFL) [F] FLASH POINT. The ininnnum temperature corrected to a pressure of 14 7 psia (101 kPa) at which the application of a test flame causes the vapors of a portion of the sample to ignite under the conditions specified by the test procedures and apparatus The flash point of a liquid shall be determined in accordance with ASTM D 56, ASTM D 93 or ASTM D 3278 FLEXIBLE AIR CONNECTOR. A conduit for transferring air between an air duct or plenum and an air terminal unit or between an air duct or plenum and an air mlet or air outlet Such conduit is limited in its use, length and location FLOOR AREA, NET. The actual occupied area, not includ- ing unoccupied accessory areas or thicknesses of walls [FG] FLOOR FURNACE. A completely self-contained fur- nace suspended from the floor of the space being heated, tak- ing air for combustion from outside such space and with means for observing flames and lighting the appliance from such space FLUE. A passageway within a chimney or vent through which gaseous combustion products pass FLUE CONNECTION (BREECHING). A passage for conducting the products of combustion from a fuel -fired appliance to the vent or chimney (see also "Chimney connec- tor" and "Vent connector") [FG] FLUE GASES. Products of combustion and excess air 2018 INTERNATIONAL MECHANICAL CODE® 13 I 1 1 1 CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DEFINITIONS FLUE LINER (LINING). A system or material used to form the inside surface of a flue in a chimney or vent, for the pur- pose of protecting the surrounding structure from the effects of combustion products and conveying combustion products without leakage to the atmosphere FOOD -GRADE FLUID. Potable water or a fluid containing additives listed in accordance with the Code of Federal Regu- lations, Title 21, Food and Drugs, Chapter 1, Food and Drug Administration, Parts 174-186 [FG] FUEL GAS. A natural gas, manufactured gas, liquefied petroleum gas or a mixture of these FUEL OIL. Kerosene or any hydrocarbon oil having a flash point not less than 100°F (38°C) FUEL -OIL PIPING SYSTEM. A closed piping system that connects a combustible liquid from a source of supply to a fuel-oil-bummg appliance FURNACE. A completely self-contained heating unit that is designed to supply heated air to spaces remote from or adja- cent to the appliance location FURNACE ROOM. A room primarily utilized for the instal- lation of fael-burning, space -heating and water -heating appli- ances other than boilers (see also `Boller room") FUSIBLE PLUG. A device arranged to relieve pressure by operation of a fusible member at a predetermined tempera- ture GROUND SOURCE HEAT PUMP LOOP SYSTEM. Pip- ing buried in horizontal or vertical excavations or placed in a body of water for the purpose of transporting heat transfer liquid to and from a heat pump Included in this definition are closed loop systems in which the liquid is recirculated and open loop systems in which the liquid is drawn from a well or other source HAZARDOUS LOCATION. Any location considered to be a fire hazard for flammable vapors, dust, combustible fibers or other highly combustible substances The location is not necessarily categorized in the International Building Code as a high -hazard use group classification HEAT EXCHANGER. A device that transfers heat from one medium to another HEAT PUMP. A refrigeration system that extracts heat from one substance and transfers it to another portion of the same substance or to a second substance at a higher temperature for a beneficial purpose HEAT TRANSFER LIQUID. The operating or thermal storage liquid in a mechanical system, including water or other liquid base, and additives at the concentration present under operating conditions used to move heat from one loca- tion to another Refrigerants are not included as heat transfer liquids HEAVY-DUTY COOKING APPLIANCE. Heavy-duty cooking appliances include electric under -fired broilers, elec- tric chain (conveyor) broilers, gas under -fired broilers, gas chain (conveyor) broilers, gas open -burner ranges (with or without oven), electric and gas wok ranges, smokers, smoker ovens, and electric and gas over -fired (upright) broilers and salamanders HIGH -PROBABILITY SYSTEMS. A refrigeration system in wluch the basic design or the location of components is such that a leakage of refrigerant from a failed connection, seal or component will enter an occupancy classified area, other than the machinery room HIGH -SIDE PRESSURE. The parts of a refrigerating sys- tem subject to condenser pressure HIGH -VOLUME, LARGE -DIAMETER FAN. A low - speed ceiling fan that circulates large volumes of air and that is greater than 7 feet (2134 mm) in diameter HOOD. An au intake device used to capture by entrapment, impingement, adhesion or similar means, grease, moisture, heat and similar contaminants before they enter a duct sys- tem Type I. A kitchen hood for collecting and removing grease vapors and smoke Such hoods are equipped with a fire suppression system Type II. A general kitchen hood for collecting and remov- ing steam, vapor, heat, odors and products of combustion [FG] HYDROGEN GENERATING APPLIANCE. A self- contained package or factory -matched packages of integrated systems for generating gaseous hydrogen Hydrogen generat- ing appliances utilize electrolysis, reformation, chemical, or other processes to generate hydrogen IGNITION SOURCE. A flame, spark or hot surface capable of igniting flammable vapors or fumes Such sources include appliance burners, burner ignitors and electrical switching devices [F] IMMEDIATELY DANGEROUS TO LIFE OR HEALTH (IDLH). The concentration of airborne contami- nants that poses a threat of death, immediate or delayed per- manent adverse health effects, or effects that could prevent escape from such an environment This contaminant concen- tration level is established by the National Institute of Occu- pational Safety and Health (NIOSH) based on both toxicity and flammability It is generally expressed in parts per million by volume (ppm v/v) or milligrams per cubic meter (mg/m') INDIRECT REFRIGERATION SYSTEM. A system in which a secondary coolant cooled or heated by the refrigerat- ing system is circulated to the air or other substance to be cooled or heated Indirect systems are distinguished by the following methods of application Closed system. A system in which a secondary fluid is either cooled or heated by the refrigerating system and then circulated within a closed circuit in indirect contact with the air or other substance to be cooled or heated Double -indirect open -spray system. A system in wluch the secondary substance for an indirect open -spray system is heated or cooled by an intermediate coolant circulated from a second enclosure Open -spray system. A system in wluch a secondary cool- ant is cooled or heated by the refrigerating system and then circulated in direct contact with the au or other sub- stance to be cooled or heated 14 2018 INTERNATIONAL MECHANICAL CODE® CITY IEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) tto S I ( I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER DEFINITIONS Vented closed system. A system in which a secondary coolant is cooled or heated by the refrigerating system and then passed through a closed circuit in the air or other sub- stance to be cooled or heated, except that the evaporator or condenser is placed in an open or appropriately vented tank INDIRECT SOLAR SYSTEM. A solar thermal system in which the gas or liquid in the solar collector loop circulates between the solar collector and a heat exchanger and such gas or liquid is not drained from the system or supplied to the load during normal operation INFILTRATION. Uncontrolled inward air leakage to condi- tioned spaces through unintentional openings in ceilings, floors and walls from unconditioned spaces or the outdoors caused by pressure differences across these openings result - mg from wind, the stack effect created by temperature differ- ences between mdoors and outdoors, and imbalances between supply and exhaust awflow rates INTERLOCK A device actuated by another device with wluch it is directly associated, to govern succeeding opera- tions of the same or allied devices A circuit in which a given action cannot occur until after one or more other actions have taken place JOINT, FLANGED. A joint made by bolting together a paw of flanged ends JOINT, FLARED. A metal -to -metal compression joint in wluch a conical spread is made on the end of a tube that is compressed by a flare nut against a mating flare JOINT, PLASTIC ADHESIVE. A joint made in thermoset plastic piping by the use of an adhesive substance that forms a continuous bond between the mating surfaces without dis- solving either one of them JOINT, PLASTIC HEAT FUSION. A joint made in ther- moplastic piping by heating the parts sufficiently to permit fusion of the materials when the parts are pressed together JOINT, PLASTIC SOLVENT CEMENT. Ajomt made in thermoplastic piping by the use of a solvent or solvent cement that forms a continuous bond between the mating surfaces JOINT, SOLDERED. A gas -tight joint obtained by the join - mg of metal parts with metallic mixtures of alloys that melt at temperatures between 400°F (204°C) and 1,000°F (538°C) JOINT, WEEDED. A gas-tightjomt obtained by the joining of metal parts in molten state [A] LABELED. Equipment materials or products to which have been affixed a label, seal, symbol or other identifying mark of a nationally recognized testing laboratory, approved agency or other organization concerned with product evalua- tion that maintains periodic inspection of the production of the labeled items and whose labeling indicates either that the equipment, material or product meets identified standards or has been tested and found suitable for a specified purpose LIGHT -DUTY COOKING APPLIANCE. Light -duty cooking appliances include gas and electric ovens (including standard, bake, roasting, revolving, rethenm, convection, combination convection/steamer, countertop conveyorized baking/finishing, deck and pastry), electric and gas steam - jacketed kettles, electric and gas pasta cookers, electric and gas compartment steamers (both pressure and atmospheric) and electric and gas cheesemelters [FG] LIMIT CONTROL. A device responsive to changes in pressure, temperature or level for turning on, shutting off or throttling the gas supply to an appliance LIMITED CHARGE SYSTEM. A system in which, with the compressor idle, the design pressure will not be exceeded when the refrigerant charge has completely evaporated [A] LISTED. Equipment materials, products or services included in a list published by an organization acceptable to the code official and concerned with evaluation of products or services that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services and whose listing states either that the equipment material, product or service meets identified standards or has been tested and found suitable for a specified purpose LIVING SPACE. Space within a dwelling unit utilized for living, sleeping, eating, cooking, bathing, washing and sanita- tion purposes LOW -PROBABILITY PUMP. A pump that does not rely on a dynamic shaft seal as a singular means of containment to I prevent atmospheric release of the pumped fluid LOWER EXPLOSIVE LIMIT (LEL). See "LFL " LOWER FLAMMABLE LIMIT (REFRIGERANT) (LFL). The minimum concentration of refrigerant that is capable of propagating a flame through a homogeneous mix- ture of refrigerant and air [F] LOWER FLAMMABLE LIMIT (LFL). The minimum concentration of vapor in air at which propagation of flame will occur in the presence of an ignition source The LFL is sometimes referred to as LEL or lower explosive limit LOW-PRESSURE HOT -WATER -HEATING BOILER. A boiler furnishing hot water at pressures not exceeding 160 psi (1103 kPa) and at temperatures not exceeding 250OF (121 PC) LOW-PRESSURE STEAM -HEATING BOILER. A boiler furnishing steam at pressures not exceeding 15 psi (103 kPa) LOW -PROBABILITY SYSTEMS. A refrigeration system in which the basic design or the location of components is such that a leakage of refrigerant from a failed connection, seal or component will not enter an occupancy -classified area, other than the machinery room LOW -SIDE PRESSURE. The parts of a refrigerating sys- tem subject to evaporator pressure MACHINERY ROOM. An enclosed space that is required by Chapter 11 to contain refrigeration equipment and to com- ply with Sections 1105 and 1106 MECHANICAL DRAFT SYSTEM. A venting system designed to remove flue or vent gases by mechanical means, that consists of an induced -draft portion under nonpositive static pressure or a forced -draft portion under positive static pressure Forced -draft venting system. A portion of a venting sys- tem using a fan or other mechanical means to cause the removal of flue or vent gases under positive static pres- sure 2018 INTERNATIONAL MECHANICAL CODE® 15 I I I I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nofirth¢,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DEFINITIONS Induced -draft venting system. A portion of a venting system using a fan or other mechanical means to cause the removal of flue or vent gases under nonpositive static vent pressure Power venting system. A portion of a venting system using a fan or other mechanical means to cause the removal of flue or vent gases under positive static vent pressure MECHANICAL EQUIPMENT/APPLIANCE ROOM. A room or space in which nonfuel-fired mechanical equipment and appliances are located MECHANICAL EXHAUST SYSTEM. A system for removing air from a room or space by mechanical means MECHANICAL JOINT. 1 A connection between pipes, fittings, or pipes and fit- tings that is not welded, brazed, caulked, soldered, sol- vent cemented or heat fused 2 A general form of gas or liquid -tight connections obtained by the joining of parts through a positive hold- ing mechanical construction such as, but not limited to, flanged, screwed, clamped or flared connections MECHANICAL SYSTEM. A system specifically addressed and regulated in this code and composed of components, devices, appliances and equipment MEDIUM -DUTY COOKING APPLIANCE. Medium - duty cooking appliances include electric discrete element ranges (with or without oven), electric and gas hot -top ranges, electric and gas griddles, electric and gas double - sided griddles, electric and gas fryers (including open deep fat fryers, donut fryers, kettle fryers and pressure fryers), electric and gas conveyor pizza ovens, electric and gas tilting skillets (braising pans) and electric and gas rotisseries MODULAR BOILER. A steam or hot -water -heating assem- bly consisting of a group of individual boilers called modules intended to be installed as a unit without intervening stop valves Modules are under one jacket or are mdividuallyjack- eted The individual modules shall be limited to a maximum input rating of 400,000 Btu/h (117 228 W) gas, 3 gallons per hour (gph) (11 4 L/h) oil, or 115 kW (electric) NATURAL DRAFT SYSTEM. A venting system designed to remove flue or vent gases under nonposrtive static vent pressure entirely by natural draft NATURAL VENTILATION. The movement of air into and out of a space through intentionally provided openings, such as windows and doors, or through nonpowered ventilators NET OCCUPIABLE FLOOR AREA. The floor area of an occupiable space defined by the inside surfaces of its walls but excluding shafts, column enclosures and other perma- nently enclosed, inaccessible and unoccupiable areas Obstructions in the space such as furnishings, display or stor- age racks and other obstructions, whether temporary or per- manent, shall not be deducted from the space area NO -FLOW CONDITION (SOLAR). A condition where thermal energy is not transferred from a solar thermal collec- tor by means of flow of a heat transfer fluid NONFOOD -GRADE FLUID. Any fluid that is not desig- nated as a food -grade fluid NONABRASIVE/ABRASIVE MATERIALS. Nonabra- sive particulate in high concentrations, moderately abrasive particulate in low and moderate concentrations, and highly abrasive particulate in low concentrations, such as alfalfa, asphalt, plaster, gypsum and salt NONCOMBUSTIBLE MATERIALS. Materials that, when tested in accordance with ASTM E 136, have not fewer than three of four specimens tested meeting all of the following criteria 1 The recorded temperature of the surface and interior thermocouples shall not at any time during the test rise more than 54°F (30°C) above the furnace temperature at the beginning of the test 2 There shall not be flaming from the specimen after the first30 seconds 3 If the weight loss of the specimen during testing exceeds 50 percent, the recorded temperature of the surface and interior thermocouples shall not at any time during the test rise above the furnace air temperature at the begmrnng of the test, and there shall not be flaming of the specimen [A] OCCUPANCY. The purpose for which a building, or portion thereof, is utilized or occupied OCCUPATIONAL EXPOSURE LIMIT (OEL). The time - weighted average (TWA) concentration for a normal 8-hour workday and a 40-hour workweek to which nearly all work- ers can be repeatedly exposed without adverse effect, based on the OSHA PEL, ACGIH TLV-TWA, TERA OARS WEEL, or consistent value OCCUPIABLE SPACE. An enclosed space intended for human activities, excluding those spaces intended primarily for other purposes, such as storage rooms and equipment rooms, that are only intended to be occupied occasionally and for short periods of time OFFSET (VENT). A combination of approved bends that make two changes in direction bringing one section of the vent out of line but into a line parallel with the other section OUTDOOR AIR. Au taken from the outdoors, and therefore not previously circulated through the system OUTDOOR OPENING. A door, window, louver or skylight openable to the outdoor atmosphere OUTLET. A threaded connection or bolted flange in a piping system to which a gas -burning appliance is attached PANEL HEATING. A method of radiant space heating in which heat is supplied by large heated areas of room surfaces The heating element usually consists of warm water piping, warm au ducts, or electrical resistance elements embedded in or located behind ceiling, wall or floor surfaces PELLET FUEL -BURNING APPLIANCE. A closed -com- bustion, vented appliance equipped with a fuel -feed mecha- nism for burning processed pellets of solid fuel of a specified size and composition PIPING. Where used in this code, "piping" refers to either pipe or tubing, or both Pipe. A rigid conduit of iron, steel, copper, copper -alloy, or plastic 16 2018 INTERNATIONAL MECHANICAL CODE® Fk ff.,( " ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto I RR I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER DEFINITIONS ' Tubing. Semirigid conduJt of copper, copper -alloy, alumJ- num, plastic or steel PLASTIC, THERMOPLASTIC. A plastic that is capable of being repeatedly softened by increase of temperature and hardened by decrease of temperature PLASTIC, THERMOSETTING. A plastic that is capable of being changed into a substantially infusible or insoluble product when cured under application of heat or chemical means PLENUM. An enclosed portion of the building structure, other than an occupiable space being conditioned, that is designed to allow air movement, and thereby serve as part of an air distribution system IPOLLUTION -CONTROL UNIT (PCU). Manufactured equipment that is installed in a grease exhaust duct system for the purpose of extracting smoke, grease particles and odors from the exhaust flow by means of a series of filters PORTABLE FUEL CELL APPLIANCE. A fuel cell gen- erator of electricity that is not fixed in place A portable fuel cell appliance utilizes a cord and plug connection to a grid - isolated load and has an integral fuel supply POWER BOILER. See `Boller " [A] PREMISES. A lot, plot or parcel of land, including any structure thereon PRESS -CONNECT JOINT. A permanent mechanical joint incorporating an elastomeric seal or an elastomeric seal and corrosion -resistant grip ring The joint is made with a press - mg tool andjaw or ring approved by the fitting manufacturer PRESSURE, FIELD TEST. A test performed in the field to prove system tightness PRESSURE -LIMITING DEVICE. A pressure -responsive mechanism designed to stop automatically the operation of the pressure -imposing element at a predetermined pressure PRESSURE RELIEF DEVICE. A pressure -actuated valve or rupture member designed to relieve excessive pressure automatically PRESSURE RELIEF VALVE. A pressure -actuated valve held closed by a spring or other means and designed to relieve pressure automatically in excess of the device's set- ting PRESSURE VESSELS. Closed containers, tanks or vessels that are designed to contain liquids or gases, or both, under pressure PRESSURE VESSELS —REFRIGERANT. Any refriger- ant -containing receptacle in a refrigerating system This does not include evaporators where each separate section does not exceed 05 cubic foot (0 014 m') of refrigerant-contammg volume, regardless of the maximum inside dimensions, evap- orator coils, controls, headers, pumps and piping PROTECTIVE ASSEMBLY (REDUCED CLEAR- ANCE). Any noncombustible assembly that is labeled or constructed in accordance with Table 308 4 2 and is placed between combustible materials or assemblies and mechanical appliances, devices or equipment, for the purpose of reducing required airspace clearances Protective assemblies attached directly to a combustible assembly shall not be considered as part of that combustible assembly PURGE. To clear of air, water or other foreign substances PUSH -FIT JOINTS. A type of mechanical joint consisting of elastomeric seals and corrosion -resistant tube grippers Such joints are permanent or removable depending on the design QUICK -OPENING VALVE. A valve that opens com- pletely by fast action, either manually or automatically con- trolled A valve requiring one -quarter round turn or less is considered to be quick opening RADIANT HEATER. A heater designed to transfer heat pri- marily by direct radiation READY ACCESS (TO). That which enables a device, appliance or equipment to be directly reached, without requiring the removal or movement of any panel or similar obstruction [see "Access (to)"] RECEIVER, LIQUID. A vessel permanently connected to a refrigeration system by inlet and outlet pipes for storage of liquid refrigerant RECIRCULATED AIR. Air removed from a conditioned space and intended for reuse as supply air RECLAIMED REFRIGERANTS. Refrigerants repro- cessed to the same specifications as for new refrigerants by means including distillation Such refrigerants have been chemically analyzed to verify that the specifications have been met Reclaiming usually implies the use of processes or procedures that are available only at a reprocessing or manu- facturing facility RECOVERED REFRIGERANTS. Refrigerants removed from a system in any condition without necessarily testing or processing them RECYCLED REFRIGERANTS. Refrigerants from which contaminants have been reduced by oil separation, removal of noncondensable gases, and single or multiple passes through devices that reduce moisture, acidity and particulate matter, such as replaceable core filter driers These procedures usu- ally are performed at the field job site or in a local service shop REFRIGERANT. A substance utilized to produce refrigera- tion by its expansion or vaporization REFRIGERANT SAFETY CLASSIFICATIONS. Group- ings that indicate the toxicity and flammability classes in accordance with Section 1103 1 The classification group is made up of a letter (A or B) that indicates the toxicity class, followed by a number (1, 2 or 3) that indicates the flammabil- ity class Refrigerant blends are similarly classified, based on the compositions at their worst cases of fractionation, as sepa- rately determined for toxicity and flammability In some cases, the worst case of fractionation is the original formula- tion Flammability. See "Flammability classification" Toxicity. See "Toxicity classification " REFRIGERATING SYSTEM. A combination of intercon- nected refrigerant-contammg parts constituting one closed 4m 2018 INTERNATIONAL MECHANICAL CODE® 17 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DEFINITIONS refrigerant circuit in which a refrigerant is circulated for the purpose of extracting heat REFRIGERATION CAPACITY RATING. Expressed as 1 horsepower (0 75 kW), 1 ton or 12,000 Btu/h (3 5 kW), shall all mean the same quantity REFRIGERATION MACHINERY ROOM. See "Machin- ery roam " REFRIGERATION SYSTEM, ABSORPTION. A heat - operated, closed -refrigeration cycle in wluch a secondary fluid (the absorbent) absorbs a primary fluid (the refrigerant) that has been vaporized in the evaporator Direct system. A system in which the evaporator is in direct contact with the material or space refrigerated, or is located in au -circulating passages communicating with such spaces Indirect system. A system in which a brine coil cooled by the refrigerant is circulated to the material or space refrig- erated, or is utilized to cool the air so circulated Indirect systems are distinguished by the type or method of appli- cation REFRIGERATION SYSTEM CLASSIFICATION. Refrigeration systems are classified according to the degree of probability that leaked refrigerant from a failed connec- tion, seal or component will enter an occupied area The dis- tinction is based on the basic design or location of the components REFRIGERATION SYSTEM, MECHANICAL. A com- bination of interconnected refrigeration -containing parts con- stituting one closed refrigerant circuit in which a refrigerant is circulated for the purpose of extracting heat and in which a compressor is used for compressing the refrigerant vapor REFRIGERATION SYSTEM, SELF-CONTAINED. A complete factory -assembled and tested system that is shipped in one or more sections and that does not have refrigerant - containing parts that are joined in the field by other than com- panion or block valves [A] REGISTERED DESIGN PROFESSIONAL. An indi- vidual who is registered or licensed to practice their respec- tive design profession as defined by the statutory requirements of the professional registration laws of the state or jurisdiction in wluch the project is to be constructed RETURN AIR. Air removed from an approved conditioned space or location and recirculated or exhausted RETURN AIR SYSTEM. An assembly of connected ducts, plenums, fittings, registers and grilles through which air from the space or spaces to be heated or cooled is conducted back to the supply unit (see also "Supply air system") [FG] ROOM HEATER VENTED. A free-standing heating unit burning solid or liquid fuel for direct heating of the space in and adjacent to that in which the unit is located SAFETY VALVE. A valve that relieves pressure in a steam boiler by opening fully at the rated discharge pressure The valve is of the spring -pop type SELF-CONTAINED EQUIPMENT. Complete, factory - assembled and tested, heating, air-conditioning or refrigera- tion equipment installed as a single unit, and having all work - mg parts, complete with motive power, in an enclosed unit of said machinery [BF] SHAFT. An enclosed space extending through one or more stories of a building, connecting vertical openings in successive floors, or floors and the roof [BF] SHAFT ENCLOSURE. The walls or construction form mg the boundaries of a shaft [A] SLEEPING UNIT. A room or space in which people sleep, which can also include permanent provisions for liv- ing, eating, and either sanitation or kitchen facilities but not both Such rooms and spaces that are also part of a dwelling unit are not sleeping units [BF] SMOKE DAMPER. A listed device installed in ducts and air transfer openings designed to resist the passage of smoke The device is installed to operate automatically, con- trolled by a smoke detection system, and where required, is capable of being positioned from a fire command center [BF] SMOKE -DEVELOPED INDEX. A numerical value assigned to a material tested in accordance with ASTM E84 SOLAR THERMAL SYSTEM. A system that converts I solar radiation to thermal energy for use in heating or cooling SOLID FUEL (COOKING APPLICATIONS). Applicable to commercial food service operations only, solid fuel is any bulk material such as hardwood, mesquite, charcoal or bri- quettes that is combusted to produce heat for cooking opera- tions SOURCE CAPTURE SYSTEM. A mechanical exhaust system designed and constructed to capture air contaminants at their source and to exhaust such contaminants to the out- door atmosphere [FG] STATIONARY FUEL CELL POWER PLANT. A self-contained package or factory -matched packages that constitute an automatically operated assembly of integrated systems for generating useful electrical energy and recover- able thermal energy that is permanently connected and fixed in place STEAM -HEATING BOILER. A boiler operated at pres- sures not exceeding 15 psi (103 kPa) for steam STOP VALVE. A shutoff valve for controlling the flow of liquid or gases [BG] STORY. That portion of a building included between the upper surface of a floor and the upper surface of the floor next above, except that the topmost story shall be that portion of a building included between the upper surface of the top- most floor and the ceiling or roof above STRENGTH, ULTIMATE. The highest stress level that the component will tolerate without rupture SUPPLY AIR. That air delivered to each or any space sup- plied by the air distribution system or the total air delivered to all spaces supplied by the air distribution system, which is provided for ventilating, heating, cooling, humidification, dehumidification and other similar purposes SUPPLY AIR SYSTEM. An assembly of connected ducts, plenums, fittings, registers and grilles through which air, heated or cooled, is conducted from the supply unit to the 18 2018 INTERNATIONAL MECHANICAL CODE® firill ' CopynEhtOoZ.0I7ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, Axmboemamhoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER DEFINITIONS space or spaces to be heated or cooled (see also "Return air system") THEORETICAL AIR. The exact amount of air required to supply oxygen for complete combustion of a given quantity of a specific fuel THERMAL RESISTANCE (R). A measure of the ability to retard the flow of heat The R-value is the reciprocal of ther- mal conductance [P] THIRD -PARTY CERTIFICATION AGENCY. An approved agency operating a product or material certification system that incorporates initial product testing, assessment and surveillance of a manufacturer's quality control system [P] THIRD -PARTY CERTIFIED. Certification obtained by the manufacturer indicating that the function and perfor- mance characteristics of a product or material have been determined by testing and ongoing surveillance by an approved third -party certification agency Assertion of certi- fication is in the form of identification in accordance with the requirements of the third -party certification agency [P] THIRD -PARTY TESTED. Procedure by which an approved testing laboratory provides documentation that a product, material or system conforms to specified require- ments TLV-TWA (THRESHOLD LIMIT VALUE -TIME - WEIGHTED AVERAGE). The time -weighted average con- centration of a refrigerant or other chemical in air for a nor- mal 8-hour workday and a 40-hour workweek, to which nearly all workers are repeatedly exposed, day after day, without adverse effects, as adopted by the American Confer- ence of Government Industrial Hygienists (ACGIH) TOILET ROOM. A room containing a water closet and, fre- quently, a lavatory, but not a bathtub, shower, spa or similar bathing fixture TOXICITY CLASSIFICATION. Refrigerants shall be classified for toxicity in one of two classes in accordance with ASHRAE 34 Class A. Refrigerants that have an occupational exposure limit (OEL) of 400 parts per million (ppm) or greater Class B. Refrigerants that have an OEL of less than 400 ppm TRANSITION FITTINGS, PLASTIC TO STEEL. An adapter for Iommg plastic pipe to steel pipe The purpose of this fitting is to provide a permanent, pressure -tight connec- tion between two materials that cannot be joined directly one to another [FG] UNIT HEATER. A self-contained appliance of the fan type, designed for the delivery of warm air directly into the space in which the appliance is located VENT. A pipe or other conduit composed of factory -made components, containing a passageway for conveying combus- tion products and air to the atmosphere, listed and labeled for use with a specific type or class of appliance Pellet vent. A vent listed and labeled for use with listed pellet -fuel -burning appliances Type L vent. A vent listed and labeled for use with the following 1 Oil -burning appliances that are listed for use with Type L vents 2 Gas -fired appliances that are listed for use with Type B vents VENT CONNECTOR. The pipe that connects an approved fuel -fired appliance to a vent VENT DAMPER DEVICE, AUTOMATIC. A device intended for installation in the venting system, in the outlet of an individual automatically operated fael-burning appliance that is designed to open the venting system automatically when the appliance is in operation and to close off the vent- ing system automatically when the appliance is in a standby or shutdown condition VENTILATION. The natural or mechanical process of sup- plying conditioned or unconditioned au to, or removing such air from, any space VENTILATION AIR. That portion of supply au that comes from the outside (outdoors), plus any recirculated air that has been treated to maintain the desired quality of air within a designated space [FG] VENTING SYSTEM. A continuous open passageway from the flue collar of an appliance to the outdoor atmo- sphere for the purpose of removing flue or vent gases A vent- ing system is usually composed of a vent or a chimney and vent connector, if used, assembled to form the open passage- way WATER HEATER. Any heating appliance or equipment that heats potable water and supplies such water to the pota- ble hot water distribution system ZONE. One occupiable space or several occupiable spaces with similar occupancy classification (see Table 403 3 1 1), occupant density, zone air distribution effectiveness and zone primary airflow rate per unit area 2018 INTERNATIONAL MECHANICAL CODE® 19 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,, x100817m8 ocJM 10-0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 20 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S ( " I I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 3 GENERAL REGULATIONS User note: About this chapter., Chapter 3 contains broadly applicable requirements that are necessarily placed in an overarching 'general" chapter. These genera/ requirements would notbe suitably located in any other chapter that is specific to unique subject matter. Genera/ requirements include those related to installation, access, location, testing, structural and clearances. SECTION 301 GENERAL 301.1 Scope. This chapter shall govern the approval and installation of all equipment and appliances that comprise parts of the building mechanical systems regulated by this code in accordance with Section 101 2 301.2 Energy utilization. Heating, ventilating and air-condi- tioning systems of all structures shall be designed and installed for efficient utilization of energy in accordance with the International Energy Conservation Code 301.3 Identification. Each length of pipe and tubing and each pipe fitting utilized in a mechanical system shall bear the identification of the manufacturer 301.4 Plastic pipe, fittings and components. Plastic pipe, fittings and components shall be third -party certified as con- forming to NSF 14 301.5 Third -party testing and certification. Piping, tubing and fittings shall comply with the applicable referenced stan- dards, specifications and performance criteria of this code and shall be identified in accordance with Section 301 3 Pip - mg, tubing and fittings shall either be tested by an approved third -party testing agency or certified by an approved thtrd- party cerhficahon agency 301.6 Fuel gas appliances and equipment. The approval and installation of fuel gas distribution piping and equipment, fuel gas -fired appliances and fuel gas -fired appliance venting systems shall be in accordance with the International Fuel Gas Code 301.7 Listed and labeled. Appliances regulated by this code shall be listed and labeled for the application in which they are installed and used, unless otherwise approved in accor- dance with Section 105 Exception: Listing and labeling of equipment and appli- ances used for refrigeration shall be in accordance with Section 1101 2 301.8 Labeling. Labeling shall be in accordance with the procedures set forth in Sections 301 8 1 through 301 8 2 3 301.8.1 Testing. An approved agency shall test a repre- sentative sample of the mechanical equipment and appli- ances being labeled to the relevant standard or standards The approved agency shall maintain a record of all of the tests performed The record shall provide sufficient detail to verify compliance with the test standard 301.8.2 Inspection and identification. The approved agency shall periodically perform an inspection, which shall be in -plant if necessary, of the mechanical equipment and appliances to be labeled The inspection shall verify that the labeled mechanical equipment and appliances are representative of the mechanical equipment and appliances tested 301.8.2.1 Independent. The agency to be approved shall be objective and competent To confirm its objec- tivity, the agency shall disclose all possible conflicts of interest 301.8.2.2 Equipment. An approved agency shall have adequate equipment to perform all required tests The equipment shall be periodically calibrated 301.8.2.3 Personnel. An approved agency shall employ experienced personnel educated in conducting, supervising and evaluating tests 301.9 Label information. A permanent factory -applied nameplate(s) shall be affixed to appliances on which shall appear in legible lettering, the manufacturer's name or trade- mark, the model number, serial number and the seal or mark of the approved agency A label shall include the following 1 Electrical equipment and appliances Electrical rating in volts, amperes and motor phase, identification of individual electrical components in volts, amperes or watts, motor phase, Btu/h (W) output, and required clearances 2 Absorption units Hourly rating in Btu/h (W), mini- mum hourly rating for units having step or automatic modulating controls, type of fuel, type of refrigerant, cooling capacity in Btu/h (W), and required clearances 3 Fuel -burning units Hourly rating in Btu/h (W), type of fuel approved for use with the appliance, and required clearances 4 Electric comfort heating appliances electric rating in volts, amperes and phase, Btu/h (W) output rating, individual marking for each electrical component in amperes or watts, volts and phase, and required clear- ances from combustibles 301.10 Electrical. Electrical wiring, controls and connections to equipment and appliances regulated by this code shall be in accordance with NFPA 70 301.11 Plumbing connections. Potable water supply and building drainage system connections to equipment and appliances regulated by this code shall be in accordance with the International Plumbing Code 2018 INTERNAT10NAL MECHANICAL CODE® 21 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)pu, tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmmLho3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER GENERAL REGULATIONS 301.12 Fuel types. Fuel -fired appliances shall be designed for use with the type of fuel to which they will be connected and the altitude at which they are installed Appliances that comprise parts of the building mechanical system shall not be converted for the usage of a different fuel, except where approved and converted in accordance with the manufac- turer's instructions The fuel input rate shall not be increased or decreased beyond the lnnit rating for the altitude at which the appliance is installed 301.13 Vibration isolation. Where vibration isolation of equipment and appliances is employed, an approved means of supplemental restraint shall be used to accomplish the sup- port and restraint 301.14 Repair. Defective material or parts shall be replaced or repaired in such a manner so as to preserve the original approval or listing 301.15 Wind resistance. Mechanical equipment, appliances and supports that are exposed to wind shall be designed and installed to resist the wind pressures determined in accor- dance with the International Building Code [BS] 301.16 Flood hazard. For structures located in flood hazard areas, mechanical systems, equipment and appliances shall be located at or above the elevation required by Section 1612 of the International Builckng Code for utilities and attendant equipment Exception: Mechanical systems, equipment and appli- ances are penmtted to be located below the elevation required by Section 1612 of the of the International Build- ing Code for utilities and attendant equipment provided that they are designed and installed to prevent water from entering or accumulating within the components and to resist hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding up to such elevation [BS] 301.16.1 Coastal high -hazard areas and coastal A zones. In coastal lugh-hazard areas and coastal A zones, mechanical systems and equipment shall not be mounted on or penetrate walls intended to break away under flood loads 301.17 Rodentproofing. Buildings or structures and the walls enclosing habitable or occupiable rooms and spaces in which persons live, sleep or work, or in which feed, food or foodstuffs are stored, prepared, processed, served or sold, shall be constructed to protect against the entrance of rodents in accordance with the International Building Code 301.18 Seismic resistance. Where earthquake loads are applicable in accordance with the International Building Code, mechanical system supports shall be designed and installed for the seismic forces in accordance with the Inter- national Building Code SECTION 302 PROTECTION OF STRUCTURE 302.1 Structural safety. The building or structure shall not be weakened by the installation of mechanical systems Where floors, walls, ceilings or any other portion of the building or structure are required to be altered or replaced in the process of installing or repairing any system, the building or structure shall be left in a safe structural condition in accordance with the International Building Code 302.2 Penetrations of floor/ceiling assemblies and fire - resistance -rated assemblies. Penetrations of floor/ceiling assemblies and assemblies required to have a fire -resistance rating shall be protected in accordance with Chapter 7 of the International Building Code [BS] 302.3 Cutting, notching and boring in wood framing. The cutting, notching and boring of wood framing members shall comply with Sections 302 3 1 through 302 3 4 [BS] 302.3.1 Joist notching. Notches on the ends of joists shall not exceed one-fourth the joist depth Holes bored in joists shall not be within 2 inches (51 mm) of the top or bottom of the joist, and the diameter of any such hole shall not exceed one-third the depth of the joist Notches in the top or bottom of joists shall not exceed one -sixth the depth and shall not be located in the middle thud of the span [BS] 302.3.2 Stud cutting and notching. In exterior walls and bearing partitions, a wood stud shall not be cut or notched in excess of 25 percent of its depth In nonbearing partitions that do not support loads other than the weight of the partition, a stud shall not be cut or notched in excess of 40 percent of its depth [BS] 302.3.3 Bored holes. The diameter of bored holes in wood studs shall not exceed 40 percent of the stud depth The diameter of bored holes in wood studs shall not exceed 60 percent of the stud depth in nonbearmg parti- tions The diameter of bored holes in wood studs shall not exceed 60 percent of the stud depth in any wall where each stud is doubled, provided that not more than two such suc- cessive doubled studs are so bored The edge of the bored hole shall be not closer than'/A inch (15 9 mm) to the edge of the stud Bored holes shall be not located at the same section of stud as a cut or notch [BS] 302.3.4 Engineered wood products. Cuts, notches and holes bored in trusses, structural composite lumber, structural glue -laminated members and I -joists are prohib- ited except where permitted by the manufacturer's recom- mendations or where the effects of such alterations are specifically considered in the design of the member by a registered design professional [BS] 302.4 Alterations to trusses. Truss members and com- ponents shall not be cut, drilled, notched, spliced or otherwise altered in any way without written concurrence and approval of a registered design professional Alterations resulting in the addition of loads to any member, such as HVAC equip- ment and water heaters, shall not be permitted without verifi- cation that the truss is capable of supporting such additional loading [BS] 302.5 Cutting, notching and boring in steel framing. The cutting, notching and boring of steel framing members shall comply with Sections 302 5 1 through 302 5 3 [BS] 302.5.1 Cutting, notching and boring holes in structural steel framing. The cutting, notching and bor- ing of holes in structural steel framing members shall be as prescribed by the registered design professional 22 2018 INTERNATIONAL MECHANICAL CODE® 1 I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( RR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER GENERAL REGULATIONS [BS] 302.5.2 Cutting, notching and boring holes in cold -formed steel framing. Flanges and lips of load -bear- ing cold -formed steel framing members shall not be cut or notched Holes in webs of load -bearing cold -formed steel framing members shall be permitted along the centerline of the web of the framing member and shall not exceed the dimensional limitations, penetration spacing or minimum hole edge distance as prescribed by the registered design professional Cutting, notching and boring holes of steel floor/roof decking shall be as prescribed by the registered design professional [BS] 302.5.3 Cutting, notching and boring holes in non- structural cold -formed steel wall framing. Flanges and lips of nonstructural cold -formed steel wall studs shall not be cut or notched Holes in webs of nonstructural cold - formed steel wall studs shall be permitted along the center- line of the web of the framing member, shall not exceed 11/ inches (38 mm) in width or 4 inches (102 mm) in length, and shall not be spaced less than 24 inches (610 mm) center to center from another hole or less than 10 inches (254 mm) from the bearing end SECTION 303 EQUIPMENT AND APPLIANCE LOCATION 303.1 General. Equipment and appliances shall be located as required by this section, specific requirements elsewhere in this code and the conditions of the equipment and appliance listing 303.2 Hazardous locations. Appliances shall not be located in a hazardous location unless listed and approved for the specific installation 303.3 Prohibited locations. Fuel -fired appliances shall not be located in, or obtain combustion air from, any of the fol- lowing rooms or spaces 1 Sleeping rooms 2 Bathrooms 3 Toiletrooms 4 Storage closets 5 Surgical rooms Exception: This section shall not apply to the following appliances 1 Direct -vent appliances that obtain all combustion air directly from the outdoors 2 Solid fuel -fired appliances, provided that combus- tion air is provided in accordance with the manufac- turers' instructions 3 Appliances installed in a dedicated enclosure in wluch all combustion air is taken directly from the outdoors, in accordance with Chapter 7 Access to such enclosure shall be through a solid door, weather-stripped in accordance with the exterior door air leakage requirements of the International Energy Conservation Code and equipped with an approved self -closing device 303.4 Protection from damage. Appliances shall not be installed in a location where subject to mechanical damage unless protected by approved barriers 303.5 Indoor locations. Furnaces and boilers installed in closets and alcoves shall be listed for such installation 303.6 Outdoor locations. Appliances installed in other than indoor locations shall be listed and labeled for outdoor instal- lation 303.7 Pit locations. Appliances installed in pits or excava- tions shall not come in direct contact with the surrounding soil and shall be installed not less than 3 inches (76 mm) above the pit floor The sides of the pit or excavation shall be held back not less than 12 inches (305 mm) from the appli- ance Where the depth exceeds 12 inches (305 mm) below adjoining grade, the walls of the pit or excavation shall be lmed with concrete or masonry Such concrete or masonry shall extend not less than 4 inches (102 mm) above adjoining grade and shall have sufficient lateral load -bearing capacity to resist collapse Excavation on the control side of the appli- ance shall extend not less than 30 inches (762 mm) horizon- tally The appliance shall be protected from flooding in an approved manner [BF] 303.8 Elevator shafts. Mechanical systems shall not be located in an elevator shaft 303.9 Fireplaces in Group I-2, Condition 2 occupancies. Fuel -burning appliances and fireplaces in Group I-2, Condi- tion 2 occupancies shall be in accordance with Section 9014 SECTION 304 INSTALLATION 304.1 General. Equipment and appliances shall be installed as required by the terms of their approval, in accordance with the conditions of the listing, the manufacturer's installation instructions and this code Manufacturer's installation instructions shall be available on the job site at the time of inspection 304.2 Conflicts. Where conflicts between this code and the conditions of listing or the manufacturer's installation instructions occur, the provisions of this code shall apply Exception: Where a code provision is less restrictive than the conditions of the listing of the equipment or appliance or the manufacturer's installation instructions, the condi- tions of the listing and the manufacturer's installation instructions shall apply 304.3 Elevation of ignition source. Equipment and appli- ances having an ignition source and located in hazardous locations and public garages, private garages, repair garages, automotive motor fuel -dispensing facilities and parking garages shall be elevated such that the source of ignition is not less than 18 inches (457 mm) above the floor surface on which the equipment or appliance rests For the purpose of this section, rooms or spaces that are not part of the living space of a dwelling unit and that communicate directly with a private garage through openings shall be considered to be part of the private garage Exception: Elevation of the ignition source is not required for appliances that are listed as flammable vapor ignition resistant 2018 INTERNATIONAL MECHANICAL CODE® 23 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER GENERAL REGULATIONS 304.3.1 Parking garages. Connection of a parking garage with any room in which there is a fuel -fired appliance shall be by means of a vestibule providing a two -doorway separation, except that a single door is permitted where the sources of ignition in the appliance are elevated in accor- dance with Section 304 3 Exception: This section shall not apply to appliance installations complying with Section 304 6 304.4 Prohibited equipment and appliance location. Equipment and appliances having an ignition source shall not be installed in Group H occupancies or control areas where open use, handling or dispensing of combustible, flammable or explosive materials occurs [FG] 304.5 Hydrogen -generating and refueling opera- tions. Hydrogen -generating and refueling appliances shall be installed and located in accordance with their listing and the manufacturer's instructions Ventilation shall be required in accordance with Section 304 5 1, 304 5 2 or 304 5 3 in public garages, private garages, repair garages, automotive motor fuel -dispensing facilities and parking garages that contain hydrogen -generating appliances or refueling systems For the purpose of this section, rooms or spaces that are not part of the living space of a dwelling unit and that communicate directly with a private garage through openings shall be con- sidered to be part of the private garage [FG] 304.5.1 Natural ventilation. Indoor locations intended for hydrogen -generating or refueling operations shall be limited to a maximum floor area of 850 square feet (79 m') and shall communicate with the outdoors in accordance with Sections 304 5 1 1 and 304 5 1 2 The maximum rated output capacity of hydrogen -generating appliances shall not exceed 4 standard cubic feet per min- ute (0 00189 m'/s) of hydrogen for each 250 square feet (23 m') of floor area in such spaces The mimmum cross - sectional dimension of air openings shall be 3 inches (76 mm) Where ducts are used, they shall be of the same cross -sectional area as the free area of the openings to which they connect In such locations, equipment and appliances having an ignition source shall be located such that the source of ignition is not within 12 inches (305 mm) of the ceiling [FG] 304.5.1.1 Two openings. Two permanent open- ings shall be provided within the garage The upper opening shall be located entirely within 12 inches (305 mm) of the ceiling of the garage The lower opening shall be located entirely within 12 inches (305 mm) of the floor of the garage Both openings shall be provided in the same exterior wall The openings shall commum- cate directly with the outdoors and shall have a mim- mum free area of '/ square foot per 1,000 cubic feet (1 m2/610 m') of garage volume [FG] 304.5.1.2 Louvers and grilles. In calculating free area required by Section 304 5 1, the required size of openings shall be based on the net free area of each opening If the free area through a design of louver or grille is known, it shall be used in calculating the size opening required to provide the free area specified If the design and free area are not known, it shall be assumed that wood louvers will have 25-percent free area and metal louvers and grilles will have 75-percent free area Louvers and grilles shall be fixed in the open position [FG] 304.5.2 Mechanical ventilation. Indoor locations intended for hydrogen -generating or refueling operations shall be ventilated in accordance with Section 502 16 In such locations, equipment and appliances having an igm- tion source shall be located such that the source of ignition is below the mechanical ventilation outlet(s) [FG] 304.5.3 Specially engineered installations. As an alternative to the provisions of Sections 304 5 1 and 304 5 2, the necessary supply of au for ventilation and dilution of flammable gases shall be provided by an approved engineered system 304.6 Public garages. Appliances located in public garages, motor fuelmg-dispensing facilities, repair garages or other areas frequented by motor vehicles, shall be installed not less than 8 feet (2438 mm) above the floor Where motor velucles are capable of passing under an appliance, the appliance shall be installed at the clearances required by the appliance manu- facturer and not less than 1 foot (305 mm) higher than the tallest velucle garage door opening Exception: The requirements of this section shall not apply where the appliances are protected from motor velu- cle impact and installed in accordance with Section 304 3 and NFPA 30A 304.7 Private garages. Appliances located in private garages and carports shall be installed with a minimum clearance of 6 feet (1829 mm) above the floor Exception: The requirements of this section shall not apply where the appliances are protected from motor velu- cle impact and installed in accordance with Section 304 3 304.8 Construction and protection. Boller rooms and fur- nace rooms shall be protected as required by the International Building Code. 304.9 Clearances to combustible construction. Heat -pro- ducing equipment and appliances shall be installed to main- tain the required clearances to combustible construction as specified in the listing and manufacturer's instructions Such clearances shall be reduced only in accordance with Section 308 Clearances to combustibles shall include such consider- ations as door swing, drawer pull, overhead projections or shelving and window swing, shutters, coverings and drapes Devices such as doorstops or limits, closers, drapery ties or guards shall not be used to provide the required clearances 304.10 Clearances from grade. Equipment and appliances installed at grade level shall be supported on a level concrete slab or other approved material extending not less than 3 inches (76 mm) above adjoining grade or shall be suspended not less than 6 inches (152 mm) above adjoining grade Such support shall be in accordance with the manufacturer's instal- lation instructions [BE] 304.11 Guards. Guards shall be provided where vari- ous components that require service and roof hatch openings 24 2018 INTERNATIONAL MECHANICAL CODE® CITY IEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hv dmepf dwood mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) tto S I (firill PETER I.i A&g,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER GENERAL REGULATIONS are located within 10 feet (3048 fom) of a roof edge or open side of a walking surface and such edge or open side is located more than 30 inches (762 fom) above the floor, roof, or grade below The guard shall extend not less than 30 inches (762 fom) beyond each end of components that require service The top of the guard shall be located not less than 42 inches (1067 fom) above the elevated surface adjacent to the guard The guard shall be constructed so as to prevent the passage of a 21-inch-diameter (533 fom) sphere and shall comply with the loading requirements for guards specified in the International Building Code Exception: Guards are not required where fall arrest/ restraint anchorage connector devices that comply with ANSUASSE Z 359 1 are installed 304.12 Area served. Appliances serving different areas of a building other than where they are installed shall be perma- nently marked in an approved manner that uniquely identifies the appliance and the area it serves SECTION 305 PIPING SUPPORT 305.1 General. Mechanical system piping shall be supported in accordance with this section 305.2 Materials. Pipe hangers and supports shall have suffi- cient strength to withstand all anticipated static and specified dynamic loading conditions associated with the intended use Pipe hangers and supports that are in direct contact with pip - mg shall be of approved materials that are compatible with the piping and that will not promote galvanic action 305.3 Structural attachment. Hangers and anchors shall be attached to the building construction in an approved manner 305.4 Interval of support. Piping shall be supported at dis- tances not exceeding the spacing specified in Table 305 4, or in accordance with ANSI/1\4SS SP-58 305.5 Protection against physical damage. In concealed locations where piping, other than cast-iron or steel, is installed through holes or notches in studs, joists, rafters or similar members less than 1'/ inches (38 mm) from the near- est edge of the member, the pipe shall be protected by shield plates Protective steel shield plates having a minimum thick- ness of 0 0575 inch (1 463 fom) (No 16 gage) shall cover the area of the pipe where the member is notched or bored, and shall extend not less than 2 inches (51 mm) above sole plates and below top plates SECTION 306 ACCESS AND SERVICE SPACE 306.1 Access. Appliances, controls devices, heat exchangers and HVAC system components that utilize energy shall be accessible for inspection, service, repair and replacement without disabling the function of a fire -resistance -rated assembly or removing permanent construction, other appli- ances, venting systems or any other piping or ducts not con- nected to the appliance being inspected, serviced, repaired or replaced A level working space not less than 30 inches deep and 30 inches wide (762 mm by 762 mm) shall be provided in front of the control side to service an appliance 306.2 Appliances in rooms. Rooms containing appliances shall be provided with a door and an unobstructed passage- way measuring not less than 36 inches (914 mm) wide and 80 inches (2032 mm) high Exception: Within a dwelling unit, appliances installed in a compartment, alcove, basement or similar space shall be accessed by an opening or door and an unobstructed pas- sageway measuring not less than 24 inches (610 mm) wide and large enough to allow removal of the largest appliance in the space, provided that a level service space of not less than 30 inches (762 fom) deep and the height of the appli- TABLE 305.4 PIPING SUPPORT SPACING PIPING MATERIAL MAXIMUM HORIZONTAL SPACING (feet) MAXIMUM VERTICAL SPACING (feet) ABS pipe 4 10` Aluminum pipe and tubing 10 15 Cast-iron pipe' 5 15 Copper or copper -alloy pipe 12 10 Copper or copper -alloy tubing 8 10 CPVC pipe or tubing, 1 inch and smaller 3 10` CPVC pipe or tubing, 11/4 inches and larger 4 10` Lead pipe Continuous 4 PB pipe or tubing 2% (32 inches) 4 PE-RT 1 inch and smaller 2% (32 inches) 10` PE-RT 11/4 inches and larger 4 10` PEX tubing 1 inch and smaller 2% (32 inches) 10` PEX tubing 11/4 inches and larger 4 10` Polypropylene (PP) pipe or tubing, 1 inch and smaller 2% (32 inches) 10` Polypropylene (PP) pipe or tubing, 11/4 inches and larger 4 10` PVC pipe 4 10` Steel tubing 8 10 Steel pipe 12 15 For SI 1 inch = 25 4 min, 1 foot= 304 8 min See Section 301 18 The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feetwhere 10-foot lengths of pipe are installed Mid -story guide 4m 4m 4m 2018 INTERNATIONAL MECHANICAL CODE® 25 I I1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dwood mm).(Qtyof FRmdNmod)O,d,,Nomb,,x10081vms ocJM 10-0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER GENERAL REGULATIONS ance, but not less than 30 inches (762 mm), is present at the front or service side of the appliance with the door open 306.3 Appliances in attics. Attics containing appliances shall be provided with an opening and unobstructed passage- way large enough to allow removal of the largest appliance The passageway shall be not less than 30 inches (762 mm) high and 22 inches (559 mm) wide and not more than 20 feet (6096 mm) in length measured along the centerline of the passageway from the opening to the appliance The passage- way shall have continuous solid flooring not less than 24 inches (610 mm) wide A level service space not less than 30 inches (762 mm) deep and 30 inches (762 mm) wide shall be present at the front or service side of the appliance The clear access opening dimensions shall be not less than 20 inches by 30 inches (508 mm by 762 mm), and large enough to allow removal of the largest appliance Exceptions: 1 The passageway and level service space are not required where the appliance is capable of being serviced and removed through the required opening 2 Where the passageway is unobstructed and not less than 6 feet (1829 mm) high and 22 inches (559 mm) wide for its entire length, the passageway shall be not greater than 50 feet (15 250 mm) in length 306.3.1 Electrical requirements. A lummaire controlled by a switch located at the required passageway opening and a receptacle outlet shall be provided at or near the appliance location in accordance with NFPA 70 306.4 Appliances under floors. Underfloor spaces contain- ing appliances shall be provided with an access opening and unobstructed passageway large enough to remove the largest appliance The passageway shall be not less than 30 inches (762 mm) high and 22 inches (559 mm) wide, nor more than 20 feet (6096 mm) in length measured along the centerline of the passageway from the opening to the appliance A level service space not less than 30 inches (762 mm) deep and 30 inches (762 mm) wide shall be present at the front or service side of the appliance If the depth of the passageway or the service space exceeds 12 inches (305 mm) below the adjoin- ing grade, the walls of the passageway shall be lined with concrete or masonry Such concrete or masonry shall extend not less than 4 inches (102 mm) above the adjoining grade and shall have sufficient lateral -bearing capacity to resist col- lapse The clear access opening dimensions shall be not less than 22 inches by 30 inches (559 mm by 762 mm), and large enough to allow removal of the largest appliance Exceptions: 1 The passageway is not required where the level ser- vice space is present when the access is open and the appliance is capable of being serviced and removed through the required opening 2 Where the passageway is unobstructed and not less than 6 feet high (1929 mm) and 22 inches (559 mm) wide for its entire length, the passageway shall not be limited in length 306.4.1 Electrical requirements. A lummaire controlled by a switch located at the required passageway opening and a receptacle outlet shall be provided at or near the appliance location in accordance with NFPA 70 306.5 Equipment and appliances on roofs or elevated structures. Where equipment requiring access or appliances are located on an elevated structure or the roof of a building such that personnel will have to climb higher than 16 feet (4877 mm) above grade to access such equipment or appli- ances, an interior or exterior means of access shall be pro- vided Such access shall not require climbing over obstructions greater than 30 inches (762 mm) in height or walking on roofs having a slope greater than four units verti- cal in 12 units horizontal (33-percent slope) Such access shall not require the use of portable ladders Where access involves climbing over parapet walls, the height shall be mea- sured to the top of the parapet wall Permanent ladders installed to provide the required access shall comply with the following minimum design criteria 1 The side railing shall extend above the parapet or roof edge not less than 30 inches (762 mm) 2 Ladders shall have rung spacing not to exceed 14 inches (356 mm) on center The uppermost rung shall be not greater than 24 inches (610 mm) below the upper edge of the roof hatch, roof or parapet, as appli- cable 3 Ladders shall have a toe spacing not less than 6 inches (152 mm) deep 4 There shall be not less than 18 inches (457 mm) between rails 5 Rungs shall have a diameter not less than 0 75-inch (19 1 mm) and be capable of withstanding a 300- pound (136 kg) load 6 Ladders over 30 feet (9144 mm) in height shall be provided with offset sections and landings capable of withstanding 100 pounds per square foot (488 kg/m ) Landing dimensions shall be not less than 18 inches (457 mm) and not less than the width of the ladder served A guard rail shall be provided on all open sides of the landing 7 Climbing clearance The distance from the centerline of the rungs to the nearest permanent object on the climbing side of the ladder shall be not less than 30 inches (762 mm) measured perpendicular to the rungs This distance shall be maintained from the point of ladder access to the bottom of the roof hatch A minimum clear width of 15 inches (381 mm) shall be provided on both sides of the ladder measured from the midpoint of and parallel with the rungs except where cages or wells are installed 8 Landing required The ladder shall be provided with a clear and unobstructed bottom landing area having a minimum dimension of 30 inches (762 mm) by 30 inches (762 mm) centered in front of the ladder Ladders shall be protected against corrosion by approved means 26 2018 INTERNATIONAL MECHANICAL CODE® 11 1 C'p IEhtOo2.01vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) tto S I ( RR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER GENERAL REGULATIONS 10 Access to ladders shall be provided at all tunes Catwalks installed to provide the required access shall be not less than 24 inches (610 mm) wide and shall have railings as required for service platforms Exception: Tlus section shall not apply to Group R-3 occupancies 306.5.1 Sloped roofs. Where appliances, equipment, fans or other components that require service are installed on a roof having a slope of three units vertical in 12 units hori- zontal (25-percent slope) or greater and having an edge more than 30 inches (762 mm) above grade at such edge, a level platform shall be provided on each side of the appli- ance or equipment to wluch access is required for service, repair or maintenance The platform shall be not less than 30 inches (762 mm) in any dimension and shall be pro- vided with guards The guards shall extend not less than 42 inches (1067 mm) above the platform, shall be con- structed so as to prevent the passage of a 21-inch-diameter (533 mm) sphere and shall comply with the loading requirements for guards specified in the International Building Code Access shall not require walking on roofs having a slope greater than four units vertical in 12 units horizontal (33-percent slope) Where access involves obstructions greater than 30 inches (762 mm) in height, such obstructions shall be provided with ladders installed in accordance with Section 306 5 or stairways installed in accordance with the requirements specified in the Interna- tional Builckng Code in the path of travel to and from appliances, fans or equipment requiring service 306.5.2 Electrical requirements. A receptacle outlet shall be provided at or near the equipment location in accor- dance with NFPA 70 SECTION 307 CONDENSATE DISPOSAL 307.1 Fuel -burning appliances. Liquid combustion by-prod- ucts of condensing appliances shall be collected and dis- charged to an approved plumbing fixture or disposal area in accordance with the manufacturer's installation instructions Condensate piping shall be of approved corrosion -resistant material and shall not be smaller than the drain connection on the appliance Such piping shall maintain a minimum hori- zontal slope in the direction of discharge of not less than one - eighth unit vertical in 12 units horizontal (1-percent slope) 307.2 Evaporators and cooling coils. Condensate dram sys- tems shall be provided for equipment and appliances contain - mg evaporators or cooling coils Condensate drain systems shall be designed, constructed and installed in accordance with Sections 307 2 1 through 307 2 5 Exception: Evaporators and cooling coils that are designed to operate in sensible cooling only and not sup- port condensation shall not be required to meet the requirements of this section 307.2.1 Condensate disposal. Condensate from all cool- ing coils and evaporators shall be conveyed from the drain pan outlet to an approved place of disposal Such piping shall maintain a mimmurn horizontal slope in the direction of discharge of not less than one -eighth unit vertical in 12 units horizontal (1-percent slope) Condensate shall not discharge into a street, alley or other areas so as to cause a nuisance 307.2.2 Drain pipe materials and sizes. Components of the condensate disposal system shall be cast iron, galva- nized steel, copper, copper alloy, cross -linked polyeth- ylene, polyethylene, ABS, CPVC, PVC, or polypropylene pipe or tubing Components shall be selected for the pres- sure and temperature rating of the installation Joints and connections shall be made in accordance with the applica- ble provisions of Chapter 7 of the International Plumbing Code relative to the material type Condensate waste and dram line size shall be not less than '/q inch internal diam- eter and shall not decrease in size from the dram pan con- nection to the place of condensate disposal Where the dram pipes from more than one unit are mamfolded together for condensate drainage, the pipe or tubing shall be sized in accordance with Table 307 2 2 TABLE 307.2.2 CONDENSATE DRAIN SIZING EQUIPMENT CAPACITY MINIMUM CONDENSATE PIPE DIAMETER Up to 20 tons of refrigeration '/q inch Over 20 tons to 40 tons of refrigeration 1 inch Over 40 tons to 90 tons of refrigeration 11/ inch Over 90 tons to 125 tons of refrigeration 11/2inch Over 125 tons to 250 tons of refrigeration 2 inch 1 inch = 25 4 mm, 1 ton = 3 517 kW 307.2.3 Auxiliary and secondary drain systems. In addi- tion to the requirements of Section 307 2 1, where damage to any building components could occur as a result of overflow from the equipment primary condensate removal system, one of the following auxiliary protection methods shall be provided for each cooling coil or fuel -fired appli- ance that produces condensate An auxiliary dram pan with a separate dram shall be provided under the coils on which condensation will occur The auxiliary pan dram shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary dram The pan shall have a minimum depth of 11/ inches (38 mm), shall be not less than 3 inches (76 mm) larger than the unit, or the coil dimensions in width and length and shall be constructed of corrosion -resistant mate- rial Galvanized sheet steel pans shall have a mini- mum thickness of not less than 0 0236 inch (0 6010 mm) (No 24 gage) Nonmetallic pans shall have a minimum thickness of not less than 0 0625 inch (1 6 mm) A separate overflow dram line shall be connected to the drain pan provided with the equipment Such overflow dram shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary dram The overflow dram line shall connect to the dram pan at a higher level than the primary dram connection 2018 INTERNATIONAL MECHANICAL CODE® 27 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER GENERAL REGULATIONS An auxiliary dram pan without a separate dram line shall be provided under the coils on which conden- sate will occur Such pan shall be equipped with a water -level detection device conforming to UL 508 that will shut off the equipment served prior to over- flow of the pan The auxiliary dram pan shall be constructed in accordance with Item 1 of this sec- tion 4 A water -level detection device conforming to UL 508 shall be provided that will shut off the equip- ment served in the event that the primary dram is blocked The device shall be installed in the primary dram line, the overflow dram line, or in the equip- ment -supplied dram pan, located at a point higher than the primary dram line connection and below the overflow rim of such pan Exception: Fuel -fired appliances that automatically shut down operation in the event of a stoppage in the condensate drainage system 307.2.3.1 Water -level monitoring devices. On down - flow units and all other coils that do not have a second- ary dram or provisions to install a secondary or auxiliary dram pan, a water -level monitoring device shall be installed inside the primary dram pan This device shall shut off the equipment served in the event that the primary dram becomes restricted Devices installed in the dram line shall not be permitted 307.2.3.2 Appliance, equipment and insulation in pans. Where appliances, equipment or insulation are subject to water damage when auxiliary dram pans fill, that portion of the appliance, equipment and insulation shall be installed above the rim of the pan Supports located inside of the pan to support the appliance or equipment shall be water resistant and approved 307.2.4 Traps. Condensate drams shall be trapped as required by the equipment or appliance manufacturer 307.2.4.1 Ductless mini -split system traps. Ductless mini -split equipment that produces condensate shall be provided with an mlme check valve located in the dram line, or a trap 307.2.5 Drain line maintenance. Condensate dram Imes shall be configured to permit the clearing of blockages and performance of maintenance without requiring the dram line to be cut 307.3 Condensate pumps. Condensate pumps located in uninhabitable spaces, such as attics and crawl spaces, shall be connected to the appliance or equipment served such that when the pump falls, the appliance or equipment will be pre- vented from operating Pumps shall be installed in accor- dance with the manufacturers' instructions SECTION 308 CLEARANCE REDUCTION 308.1 Scope. This section shall govern the reduction in required clearances to combustible materials and combusti- ble assemblies for chimneys, vents, kitchen exhaust equip- ment, mechanical appliances, and mechanical devices and equipment 308.2 Listed appliances and equipment. The reduction of the required clearances to combustibles for listed and labeled appliances and equipment shall be in accordance with the requirements of this section except that such clearances shall not be reduced where reduction is specifically prohibited by the terms of the appliance or equipment listing 308.3 Protective assembly construction and installation. Reduced clearance protective assemblies, including struc- tural and support elements, shall be constructed of noncom- bustible materials Spacers utilized to maintain an airspace between the protective assembly and the protected material or assembly shall be noncombustible Where a space between the protective assembly and protected combustible material or assembly is specified, the same space shall be provided around the edges of the protective assembly and the spacers shall be placed so as to allow air circulation by convection in such space Protective assemblies shall not be placed less than 1 inch (25 mm) from the mechanical appliances, devices or equipment, regardless of the allowable reduced clearance 308.4 Allowable reduction. The reduction of required clear- ances to combustible assemblies or combustible materials shall be based on the utilization of a reduced clearance pro- tective assembly in accordance with Section 308 4 1 or 30842 308.4.1 Labeled assemblies. The allowable clearance reduction shall be based on an approved reduced clearance protective assembly that is listed and labeled in accor- dance with UL 1618 308.4.2 Reduction table. The allowable clearance reduc- tion shall be based on one of the methods specified in Table 308 4 2 Where required clearances are not listed in Table 308 4 2, the reduced clearances shall be detenmmed by linear interpolation between the distances listed in the table Reduced clearances shall not be derived by extrapo- lation below the range of the table 308.4.2.1 Solid fuel -burning appliances. The clear- ance reduction methods specified in Table 308 4 2 shall not be utilized to reduce the clearance required for solid fuel -burning appliances that are labeled for instal- lation with clearances of 12 inches (305 mm) or less Where appliances are labeled for installation with clearances of greater than 12 inches (305 mm), the clearance reduction methods of Table 308 4 2 shall not reduce the clearance to less than 12 inches (305 mm) 308.4.2.2 Masonry chimneys. The clearance reduc- tion methods specified in Table 308 4 2 shall not be uti- lized to reduce the clearances required for masonry chimneys as specified in Chapter 8 and the Intema- honal Building Code 308.4.2.3 Chimney connector pass-throughs. The clearance reduction methods specified in Table 308 4 2 shall not be utilized to reduce the clearances required for chimney connector pass-throughs as specified in Section 803 10 4 28 2018 INTERNATIONAL MECHANICAL CODE® 1 I Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( Fa I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER GENERAL REGULATIONS 308.4.2.4 Masonry fireplaces. The clearance reduc- tion methods specified in Table 308 4 2 shall not be uti- lized to reduce the clearances required for masonry fireplaces as specified in Chapter 8 and the Interna- tional Building Code 308.4.2.5 Kitchen exhaust ducts. The clearance reduction methods specified in Table 308 4 2 shall not be utilized to reduce the mmimum clearances required by Section 506 3 11 1 for kitchen exhaust ducts enclosed in a shaft SECTION 309 TEMPERATURE CONTROL [BG] 309.1 Space -heating systems. Interior spaces intended for human occupancy shall be provided with active or passive space -heating systems capable of maintaining an indoor tem- perature of not less than 68'F (20°C) at a point 3 feet (914 mm) above floor on the design heating day The installation of portable space heaters shall not be used to achieve compli- ance with this section Exceptions: 1 Interior spaces where the primary purpose is not associated with human comfort 2 Group F, H, S and U occupancies SECTION 310 EXPLOSION CONTROL [F] 310.1 Required. Structures occupied for purposes involving explosion hazards shall be provided with explo- sion control where required by the International Fire Code Explosion control systems shall be designed and installed in accordance with Section 911 of the International Fire Code SECTION 311 SMOKE AND HEAT VENTS [F] 311.1 Required. Approved smoke and heat vents shall be installed in the roofs of one-story buildings where required by the International Fire Code Smoke and heat vents shall be designed and installed in accordance with the International Fire Code SECTION 312 HEATING AND COOLING LOAD CALCULATIONS 312.1 Load calculations. Heating and cooling system design loads for the purpose of sizing systems, appliances and equip- ment shall be determined in accordance with the procedures described in the ASHRAE/ACCA Standard 183 Alterna- tively, design loads shall be determined by an approved equivalent computation procedure, using the design parame- ters specified in Chapter 3 [CE] of the International Energy Conservation Code TABLE 308.4.2 CLEARANCE REDUCTION METHODS' REDUCED CLEARANCE WITH PROTECTION (inches) - Horizontal combustible assemblies Horizontal combustible assemblies located beneath the heat source and all TYPE OF PROTECTIVE ASSEMBLY- located above the heat source vertical combustible assemblies Required clearance to combustibles Required clearance to combustibles without protection (inches)- without protection (inches) 36 18 9 6 36 18 9 6 Galvanized sheet steel, having a inu m an thickness of 0 0236 inch (No 24 gage), mounted on 1-inch glass fiber or mineral wool 18 9 5 3 12 6 3 3 ban reinforced with wire on the back, 1 inch off the combustible assembly Galvanized sheet steel, having a mimmum thickness of 0 0236 18 9 5 3 12 6 3 2 inch (No 24 gage), spaced 1 inch off the combustible assembly Two layers of galvanized sheet steel, having a in == thickness of 0 0236 inch (No 24 gage), having a 1-inch airspace between 18 9 5 3 12 6 3 3 layers, spaced 1 inch off the combustible assembly Two layers of galvanized sheet steel, having a in == thickness of 0 0236 inch (No 24 gage), having 1 inch of fiberglass insulation 18 9 5 3 12 6 3 3 between layers, spaced 1 inch off the combustible assembly 0 5-inch inorganic insulating board, over 1 inch of fiberglass or 24 12 6 4 18 9 5 3 mineral wool ban, against the combustible assembly 31/71nch brick wall, spaced 1 inch off the combustible wall 12 6 6 6 31/-inch brick wall, against the combustible wall 24 12 6 5 For SI 1 inch = 25 4 mm, oC = [(oF) - 32]/1 8, 1 pound per cubic foot =l6 02 kg/m', 1 0 Btu • in/(ff • h • oF) = 0 144 W/m' • K a Mineral wool and glass fiber baits (blanket or board) shall have a minimum density of 8 pounds per cubic foot and a minimum melting point of 1,500oF Insulation material utilized as part of a clearance reduction system shall have a thermal conductivity of 1 0 Btu • in/if • h • oF) or less Insulation board shall be formed of noncombustible material b For limitations on clearance reduction for solid fuel -burning appliances, masonry chimneys, connector pass-throughs, masonry fire places and kitchen ducts, see Sections 308 4 2 1 through 308 4 2 5 2018 INTERNATIONAL MECHANICAL CODE® 29 I I I I CITFIghtOO2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dv od mm).(Qtyof FRmdNmod)O,d,,Nomb6xl-O817D8 ocJM IOZM0 m.-- PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 30 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S ( " I I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 4 VENTILATION User note: About this chapter. Chapter 4 intends to provide an indoor atmosphere that protects the health and well being of building occupants. Both mechanical and natural ventilation are addressed. Mechanical ventilation provides what is considered to be acceptable indoor air quality. Mechanical ventilation minimizes adverse health effects and provides an atmosphere thatgenerally is not objectionable to occupants. SECTION 401 GENERAL 401.1 Scope. This chapter shall govern the ventilation of spaces within a building intended to be occupied Mechanical exhaust systems, including exhaust systems serving clothes dryers and cooking appliances, hazardous exhaust systems, dust, stock and refuse conveyor systems, subslab soil exhaust systems, smoke control systems, energy recovery ventilation systems and other systems specified in Section 502 shall comply with Chapter 5 401.2 Ventilation required. Every occupied space shall be ventilated by natural means in accordance with Section 402 or by mechanical means in accordance with Section 403 Where the air infiltration rate in a dwelling unit is less than 5 air changes per hour when tested with a blower door at a pres- sure of 0 2-inch water column (50 Pa) in accordance with Section R402 4 1 2 of the Internahonal Energy Conservahon Code, the dwelling unit shall be ventilated by mechanical means in accordance with Section 403 Ambulatory care facilities and Group I-2 occupancies shall be ventilated by mechanical means in accordance with Section 407 401.3 When required. Ventilation shall be provided during the periods that the room or space is occupied 401.4 Intake opening location. Air intake openings shall comply with all of the following 1 Intake openings shall be located not less than 10 feet (3048 mm) from lot lines or buildings on the same lot Mechanical and gravity outdoor air intake openings shall be located not less than 10 feet (3048 mm) hori- zontally from any hazardous or noxious contammant source, such as vents, streets, alleys, parking lots and loading docks, except as specified in Item 3 or Section 501 3 1 Outdoor air intake openings shall be permitted to be located less than 10 feet (3048 mm) horizontally from streets, alleys, parking lots and loading docks pro- vided that the openings are located not less than 25 feet (7620 mm) vertically above such locations Where openings front on a street or public way, the distance shall be measured from the closest edge of the street or public way Intake openings shall be located not less than 3 feet (914 mm) below contammant sources where such sources are located within 10 feet (3048 mm) of the opening 4 Intake openings on structures in flood hazard areas shall be at or above the elevation required by Section 1612 of the Internahonal Builchng Code for utilities and attendant equipment 401.5 Intake opening protection. Air intake openings that term mate outdoors shall be protected with corrosion -resistant screens, louvers or grilles Openings in louvers, grilles and screens shall be sized in accordance with Table 401 5, and shall be protected against local weather conditions Louvers that protect air intake openings in structures located in hurri- cane -prone regions, as defined in the Internahonal Building Code, shall comply with AMCA 550 Outdoor air intake openings located in exterior walls shall meet the provisions for exterior wall opening protectives in accordance with the Internahonal Builchng Code. TABLE 401.5 OPENING SIZES IN LOUVERS, GRILLES AND SCREENS PROTECTING AIR INTAKE OPENINGS MINIMUM AND MAXIMUM OUTDOOR OPENING TYPE OPENING SIZES IN LOUVERS, GRILLES AND SCREENS' Intake openings in Not < I/4 inch and not> I/L inch residential occupancies Intake openings in other > I/ inch and not > 1 inch than residential occupancies For SI 1 inch = 25 4 min a For rectangular openings, the table requirements apply to the shortest side I For round openings, the table requirements apply to the diameter For square openings, the table requirements apply to any side 401.6 Contaminant sources. Stationary local sources pro- ducing airborne particulates, heat, odors, fumes, spray, vapors, smoke or gases in such quantities as to be irritating or injurious to health shall be provided with an exhaust system in accordance with Chapter 5 or a means of collection and removal of the contaminants Such exhaust shall discharge directly to an approved location at the exterior of the build- ing SECTION 402 NATURAL VENTILATION [BG] 402.1 Natural ventilation. Natural venhlahon of an occupied space shall be through windows, doors, louvers or other openings to the outdoors The operating mechanism for such openings shall be provided with ready access so that the openings are readily controllable by the building occupants [BG] 402.2 Ventilation area required. The mmimum open - able area to the outdoors shall be 4 percent of the floor area being ventilated 2018 INTERNATIONAL MECHANICAL CODE® 31 I I1 I CITFIghtOO?.o,vICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf da od mm).(Qtyof FRmdNmod)O,d,,Nomb,, x100817m8 ocJM 10-0 m. oo PAL(PST) Tug tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER VENTILATION [BG] 402.3 Adjoining spaces. Where rooms and spaces without openings to the outdoors are ventilated through an adjoining room, the opening to the adjoining rooms shall be unobstructed and shall have an area not less than 8 percent of the floor area of the interior room or space, but not less than 25 square feet (2 3 m) The mimmum openable area to the outdoors shall be based on the total floor area being venti- lated Exception: Exterior openings required for ventilation shall be permitted to open into a thermally isolated sun - room addition or patio cover, provided that the openable area between the sunroom addition or patio cover and the interior room has an area of not less than 8 percent of the floor area of the interior room or space, but not less than 20 square feet (1 86 m) The mimmum openable area to the outdoors shall be based on the total floor area being ventilated [BG] 402.4 Openings below grade. Where openings below grade provide required natural ventilation, the outdoor hori- zontal clear space measured perpendicular to the opening shall be one and one-half times the depth of the opening The depth of the opening shall be measured from the average adjoining ground level to the bottom of the opening SECTION 403 MECHANICAL VENTILATION 403.1 Ventilation system. Mechanical ventilation shall be provided by a method of supply air and return or exhaust air except that mechanical ventilation air requirements for Group R-2, R-3 and R-4 occupancies three stories and less in height above grade plane shall be provided by an exhaust system, supply system or combination thereof The amount of supply air shall be approximately equal to the amount of return and exhaust air The system shall not be prohibited from produc- ing negative or positive pressure The system to convey venh- lation air shall be designed and installed in accordance with Chapter 6 403.2 Outdoor air required. The minimum outdoor awflow rate shall be determined in accordance with Section 403 3 Exception: Where the registered design professional demonstrates that an engineered ventilation system design will prevent the maximum concentration of contaminants from exceeding that obtainable by the rate of outdoor air ventilation determined in accordance with Section 403 3, the minimum required rate of outdoor air shall be reduced in accordance with such engineered system design 403.2.1 Recirculation of air. The outdoor air required by Section 403 3 shall not be recirculated Air in excess of that required by Section 403 3 shall not be prohibited from being recirculated as a component of supply air to building spaces, except that 1 Ventilation air shall not be recirculated from one dwelling to another or to dissimilar occupancies 2 Supply air to a swimming pool and associated deck areas shall not be recirculated unless such air is dehumidified to maintain the relative humidity of the area at 60 percent or less Air from this area shall not be recirculated to other spaces where more than 10 percent of the resulting supply airstream consists of air recirculated from these spaces Where mechanical exhaust is required by Note b in Table 403 3 1 1, recirculation of au from such spaces shall be prohibited Recirculation of air that is contained completely within such spaces shall not be prohibited Where recirculation of au is prohib- ited, all air supplied to such spaces shall be exhausted, including any air in excess of that required by Table 403 3 1 1 Where mechanical exhaust is required by Note g in Table 403 3 1 1, mechanical exhaust is required and recirculation from such spaces is prohbited where more than 10 percent of the resulting supply air- stream consists of air recirculated from these spaces Recirculation of air that is contained completely within such spaces shall not be prohibited 403.2.2 Transfer air. Except where recirculation from such spaces is prohbited by Table 403 3 1 1, air trans- ferred from occupiable spaces is not prohibited from serv- ing as makeup air for required exhaust systems in such spaces as kitchens, baths, toilet rooms, elevators and smoking lounges The amount of transfer air and exhaust air shall be sufficient to provide the flow rates as specified in Section 403 3 1 1 The required outdoor awflow rates specified in Table 403 3 1 1 shall be introduced directly into such spaces or into the occupied spaces from which air is transferred or a combination of both 403.3 Outdoor air and local exhaust airflow rates. Group R-2, R-3 and R-4 occupancies three stories and less in height above grade plane shall be provided with outdoor air and local exhaust in accordance with Section 403 3 2 Other buildings intended to be occupied shall be provided with out- door air and local exhaust in accordance with Section 4033 1 403.3.1 Other buildings intended to be occupied. The design of local exhaust systems and ventilation systems for outdoor air for occupancies other than Group R-2, R-3 and R-4 three stories and less above grade plane shall comply with Sections 403 3 1 1 through 403 3 1 5 403.3.1.1 Outdoor airflow rate. Ventilation systems shall be designed to have the capacity to supply the minimum outdoor awflow rate, determined in accor- dance with this section In each occupiable space, the ventilation system shall be designed to deliver the required rate of outdoor awflow to the breathing zone The occupant load utilized for design of the ventilation system shall be not less than the number determmed from the estimated maximum occupant load rate indi- cated in Table 403 3 1 1 Ventilation rates for occupan- cies not represented in Table 403 3 1 1 shall be those for a listed occupancy classification that is most similar in terms of occupant density, activities and building construction, or shall be determined by an approved engineering analysis The ventilation system shall be designed to supply the required rate of ventilation air continuously during the period the building is occupied, except as otherwise stated in other provisions of the code 32 2018 INTERNATIONAL MECHANICAL CODE® C'p IEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) tto S I (firill Fa I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER VENTILATION With the exception of smoking lounges, the ventila- tion rates in Table 403 3 1 1 are based on the absence of smoking in occupiable spaces Where smoking is anticipated in a space other than a smoking lounge, the ventilation system serving the space shall be designed to provide ventilation over and above that required by Table 403 3 1 1 in accordance with accepted engineer- ing practice Exception: The occupant load is not required to be detemimed based on the estimated maximum occu- pant load rate indicated in Table 403 3 1 1 where approved statistical data document the accuracy of an alternate anticipated occupant density 403.3.1.1.1 Zone outdoor airflow. The minimum outdoor airflow required to be supplied to each zone shall be detemimed as a function of occupancy clas- sification and space air distribution effectiveness in accordance with Sections 403 3 1 1 1 1 through 40331113 403.3.1.1.1.1 Breathing zone outdoor airflow. The outdoor airflow rate required in the breath- ing zone (Vj of the occupiable space or spaces in a zone shall be determined in accordance with Equation 4-1 Vbz = RPPG + RA (Equation 4-1) where Az — Zone floor area the net occupiable floor area of the space or spaces in the zone Pz — Zone population the number of people in the space or spaces in the zone RP — People outdoor air rate the outdoor airflow rate required per person from Table 403 3 1 1 Ra — Area outdoor air rate the outdoor airflow rate required per unit area from Table 403311 403.3.1.1.1.2 Zone air distribution effective- ness. The zone air distribution effectiveness (E) shall be determined using Table 403 3 1 1 12 TABLE 403.3.1.1.1.2 ZONE AIR DISTRIBUTION EFFECTIVENESS.,b,d AIR DISTRIBUTION CONFIGURATION E Ceiling or floor supply of cool For 1 OF Ceiling or floor supply of warm For and floor return 1 0 Ceiling supply of warm For and ceiling return 0 8i Floor supply of warm For and ceiling return 07 Makeup For drawn in on the opposite side of the room from the exhaust or return 08 Makeup For drawn in near to the exhaust or return loca- tion 05 For SI 1 foot — 304 8 arm, 1 foot per minute = 0 00506 m/s, °C — [(°F) —32]/1 8 a "Cool air" is air cooler than space temperature b "Warm an" is air wanner than space temperature c "Ceding" includes any point above the breathing zone d "Floor" includes any point below the breathing zone e Zone air distribution effectiveness of 1 2 shall be permitted for systems with a floor supply of cool air and ceiling return, provided that low - velocity displacement ventilation achieves unidirectional flow and thermal stratification f Zone air distribution effectiveness of 1 0 shall be permitted for systems with a ceding supply of warm air, provided that supply air temperature is less than 15°F above space temperature and provided that the 150-foot- per-minute supply air jet reaches to within 41/L feet of floor level 403.3.1.1.1.3 Zone outdoor airflow. The zone outdoor airflow rate (Vj, shall be determined in accordance with Equation 4-2 Vbz VOz E L (Equation 4-2) 403.3.1.1.2 System outdoor airflow. The outdoor air required to be supplied by each ventilation sys- tem shall be determined in accordance with Sections 403 3 1 1 2 1 through 403 3 1 1 2 3 4 as a function of system type and zone outdoor airflow rates 403.3.1.1.2.1 Single zone systems. Where one air handler supplies a mixture of outdoor air and recirculated return air to only one zone, the sys- tem outdoor air intake flow rate (V,) shall be determined in accordance with Equation 4-3 Vof VI,,, (Equation 4-3) 403.3.1.1.2.2 100-percent outdoor air systems. Where one air handler supplies only outdoor air to one or more zones, the system outdoor air intake flow rate (V,) shall be determined using Equation 4-4 V°t = ZG11ZCE"V I, (Equation 4-4) 403.3.1.1.2.3 Multiple zone recirculating sys- tems. Where one air handler supplies a mixture of outdoor air and recirculated return air to more than one zone, the system outdoor air intake flow rate (V) shall be determined in accordance with Sections 403 3 1 1 2 3 1 through 403 3 1 1 2 3 4 403.3.1.1.2.3.1 Primary outdoor air frac- tion. The primary outdoor air fraction (ZP) shall be detenmined for each zone in accor- dance with Equation 4-5 ZP = V°G (Equation 4-5) VPL where V, — Primary airflow The airflow rate supplied to the zone from the air - handling unit at which the outdoor air intake is located It includes outdoor intake air and recirculated air from that air -handling umt but does not include air transferred or air recirculated to the 2018 INTERNATIONAL MECHANICAL CODE® 33 I l l l CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dv od mm).(Qtyof FRmdNmod)O,d,,Nomb,,x10081vms ocJM 10-0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER VENTILATION zone by other means For design purposes, V shall be the zone design primary airflow rate, except for zones with variable air volume supply and V� shall be the lowest expected primary airflow rate to the zone when it is fully occupied 403.3.1.1.2.3.2 System ventilation efficiency. The system ventilation efficiency (EJ shall be determined using Table 403 3 1 12 3 2 or Appendix A of ASHRAE 62 1 TABLE 403.3.1.1.2.3.2 SYSTEM VENTILATION EFFICIENCY"' Max(Zd E <_015 1 s025 09 <_035 08 5045 07 <_055 06 <_065 05 5075 04 >075 03 a Max (Z) is the largest value of P calculated using Equation 4-5 among all the zones served by the system b Interpolating between table values shall be permitted 403.3.1.1.2.3.3 Uncorrected outdoor air intake. The uncorrected outdoor air intake flow rate (VJ shall be detemmmed in accor- dance with Equation 4-6 Vou — DDal1,A,Ev "pPz+Dallzonzr"aA1z (Equation 4-6) where D = Occupant diversity the ratio of the system population to the sum of the zone populations, determined in accordance with Equation 4-7 D = PC (Equation 4-7) Dail zonesPz where Ps = System population The total number of occupants in the area served by the system For design purposes, Ps shall be the maximum number of occupants expected to be concurrently in all zones served by the system 403.3.1.1.2.3.4 Outdoor air intake flow rate. The outdoor air intake flow rate (V,) shall be determined in accordance with Equation 4-8 VGt = E u (Equation 4-8) 403.3.1.2 Exhaust ventilation. Exhaust airflow rate shall be provided in accordance with the requirements of Table 403 3 1 1 Outdoor air introduced into a space by an exhaust system shall be considered as contribut- ing to the outdoor airflow required by Table 403 3 1 1 403.3.1.3 System operation. The minimum flow rate of outdoor air that the ventilation system must be capa- ble of supplying during its operation shall be permitted to be based on the rate per person indicated in Table 403 3 1 1 and the actual number of occupants present 403.3.1.4 Variable air volume system control. Vari- able au volume air distribution systems, other than those designed to supply only 100-percent outdoor air, shall be provided with controls to regulate the flow of outdoor air Such control system shall be designed to maintain the flow rate of outdoor air at a rate of not less than that required by Section 403 3 over the entire range of supply au operating rates 403.3.1.5 Balancing. The ventilation air distribution system shall be provided with means to adjust the sys- tem to achieve not less than the mimmum ventilation airflow rate as required by Sections 403 3 and 403 3 1 2 Ventilation systems shall be balanced by an approved method Such balancing shall verify that the ventilation system is capable of supplying and exhaust - mg the airflow rates required by Sections 403 3 and 403312 403.3.2 Group R-2, R-3 and R-4 occupancies, three sto- ries and less. The design of local exhaust systems and ventilation systems for outdoor air in Group R-2, R-3 and R-4 occupancies three stories and less in height above grade plane shall comply with Sections 403 3 2 1 through 403325 403.3.2.1 Outdoor air for dwelling units. An outdoor air ventilation system consisting of a mechanical exhaust system, supply system or combination thereof shall be installed for each dwelling unit Local exhaust or supply systems, including outdoor air ducts con- nected to the return side of an air handler, are permitted to serve as such a system The outdoor air ventilation system shall be designed to provide the required rate of outdoor air continuously during the period that the building is occupied The minimum continuous outdoor airflow rate shall be determined in accordance with Equation 4-9 Q0A=0OlAfloor+75(Nbr+1) (Equation4-9) where QOA — outdoor airflow rate, cfm A,,00r = floor area, ft' Nbr = number of bedrooms, not to be less than one Exception: The outdoor air ventilation system is not required to operate continuously where the system has controls that enable operation for not less than 1 hour of each 4-hour period The average outdoor air- 34 2018 INTERNATIONAL MECHANICAL CODE® 11 1 CopynEhtOoZ.0I7ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,Nomb,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( fiTER I.i A&g,­,AOICC Nof th,, ,od,S,o,,,o u ,,, od,S,00zbyany ,dputyo, AxmboemPOow.d 9e�gleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER VENTILATION flow rate over the 4-hour period shall be not less than that prescribed by Equation 4-9 403.3.2.2 Outdoor air for other spaces. Corridors and other common areas within the conditioned space shall be provided with outdoor air at a rate of not less than 0 06 cfm per square foot of floor area 403.3.2.3 Local exhaust. Local exhaust systems shall be provided in kitchens, bathrooms and toilet rooms and shall have the capacity to exhaust the mmimum air- flow rate determined in accordance with Table 403323 TABLE 403.3.2.3 MINIMUM REQUIRED LOCAL EXHAUST RATES FOR GROUP R-2, R-3, AND R-4 OCCUPANCIES AREA TO BE EXHAUSTED EXHAUST RATE CAPACITY Kitchens 100 cfm intermittent or 25 cfm continuous Bathrooms and toilet rooms 50cfmmtermittentor 20 cfm continuous For SI 1 cubic foot per minute = 0 0004719 m'/s 403.3.2.4 System controls. Where provided within a dwelling unit, controls for outdoor air ventilation sys- tems shall include text or a symbol indicating the sys- tem's function 403.3.2.5 Ventilating equipment. Exhaust equipment serving single dwelling units shall be listed and labeled to provide the mmimum required air flow in accor- dance with ANSUAMCA 210-ANSUASHRAE 51 SECTION 404 ENCLOSED PARKING GARAGES 404.1 Enclosed parking garages. Mechanical ventilation systems for enclosed parking garages shall operate continu- ously or shall be automatically operated by means of carbon monoxide detectors applied in conjunction with nitrogen dioxide detectors Such detectors shall be listed in accordance with UL 2075 and installed in accordance with their listing and the manufacturers' instructions Automatic operation shall cycle the ventilation system between the following two modes of operation 1 Full -on at an airflow rate of not less than 0 75 cfm per square foot [0 0038 m'/(s . m)] of the floor area served 2 Standby at an airflow rate of not less than 0 05 cfm per square foot [0 00025 m'/(s . m)] of the floor area served 404.2 Occupied spaces accessory to public garages. Con- necting offices, waiting rooms, ticket booths and similar uses that are accessory to a public garage shall be maintained at a positive pressure and shall be provided with ventilation in accordance with Section 403 3 1 SECTION 405 SYSTEMS CONTROL 405.1 General. Mechanical ventilation systems shall be pro- vided with manual or automatic controls that will operate such systems whenever the spaces are occupied Air-condi- tioning systems that supply required ventilation air shall be provided with controls designed to automatically maintain the required outdoor au supply rate during occupancy SECTION 406 VENTILATION OF UNINHABITED SPACES 406.1 General. Uninhabited spaces, such as crawl spaces and attics, shall be provided with natural ventilation openings as required by the International Building Code or shall be pro- vided with a mechanical exhaust and supply air system The mechanical exhaust rate shall be not less than 0 02 cfm per square foot (0 00001 m'/s • m) of horizontal area and shall be automatically controlled to operate when the relative humid- ity in the space served exceeds 60 percent SECTION 407 AMBULATORY CARE FACILITIES AND GROUP 1-2 OCCUPANCIES 407.1 General. Mechanical ventilation for ambulatory care facilities and Group I-2 occupancies shall be designed and installed in accordance with this code and ASHRAE 170 2018 INTERNATIONAL MECHANICAL CODE® 35 I 11 1 CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf da od mm).(Qtyof FRmdNmod)O,d,,Nomb,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER VENTILATION TABLE 403.3.1.1 MINIMUM VENTILATION RATES PEOPLE OUTDOOR AREA OUTDOOR EXHAUST OCCUPANCY CLASSIFICATION OCCUPANT DENSITY #11000 FV AIRFLOW RATE IN BREATHING ZONE, AIRFLOW RATE IN BREATHING ZONE, AIRFLOW RATE R, CFMIPERSON R, CFMIFT2a CFM/FTSa Correctional facilities Booking/waiting 50 75 006 Cells without plumbing fixtures 25 5 012 with plumbing fixturesg 25 5 012 10 Day room 30 5 006 During halls (see "Food and beverage service") Guard stations 15 5 006 Dry cleaners, laundries Coin -operated dry cleaner 20 15 Coin -operated laundries 20 75 012 Commercial dry cleaner 30 30 Commercial laundry 10 25 Storage, pick up 30 75 0 12 Education Art classrooms 20 10 0 18 0 7 Auditonums 150 5 006 Classrooms (ages 5-8) 25 10 0 12 Classrooms (age 9 plus) 35 10 0 12 Computer lab 25 10 0 12 Corridors (see "Public spaces") Day care (through age 4) 25 10 0 18 Lecture classroom 65 75 006 Lecture hall (fixed seats) 150 75 006 Locker/dressing roomsg 025 Media center 25 10 012 Multiuse assembly 100 75 006 Music/theater/dance 35 10 006 Science laboratoriesg 25 10 0 18 10 Smoking lounges' 70 60 Sports locker roomsg 0 5 Wood/metal shopsg 20 10 0 18 0 5 Food and beverage service Bars, cocktail lounges 100 75 0 18 Cafeteria, fast food 100 75 0 18 During rooms 70 75 0 18 Kitchens (cooking)' 20 75 012 0 7 (continued) 36 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@O?.o,v ICC ALL RIGHTS RESERVED A--dby HDOP, Cm Cm, (hv dmep -dwood mm).(QtyofR—d—od)O,d,,N=b¢x,00e,vms ocJM 10-0 m. oo PM (PST) L-mmtto S ( " I I.—Agffi,—o ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,o,,byany ,dputyo,Axmboemamhoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER VENTILATION TABLE 403.3.1.1—continued MINIMUM VENTILATION RATES PEOPLE OUTDOOR AREA OUTDOOR EXHAUST OCCUPANCY CLASSIFICATION OCCUPANT DENSITY #11000 FT`- AIRFLOW RATE IN BREATHING ZONE, AIRFLOW RATE IN BREATHING ZONE, AIRFLOW RATE Rp CFMIPERSON R,CFrNFT2a CFM1FTSa Hotels, motels, resorts and dormitories Bathrooms/toilet pnvateg 25/50J Bedroom/living room 10 5 006 Conference/meeting 50 5 006 Dormitory sleeping areas 20 5 006 Gambling casinos 120 75 018 Lobbies/prefunction 30 75 006 Multipurpose assembly 120 5 006 Offices Conference rooms 50 5 006 Main entry lobbies 10 5 006 Office spaces 5 5 006 Reception areas 30 5 006 Telephone/data entry 60 5 006 Private dwellings, single and multiple Garages, common for multiple units' 075 Kitchens' 25/100E Based on number of Living areas` bedrooms First bed- 0 35 ACH but not less room, 2, each addi- than 15 cfm/person tional bedroom, 1 Toilet rooms and bathroomsg 20/50) Public spaces Corridors 006 Courtrooms 70 5 006 Elevator car 10 Legislative chambers 50 5 006 Libraries 10 5 012 Museums (cluldren's) 40 75 012 Museums/galleries 40 75 006 Places of religious worslup 120 5 006 Shower room (per shower head)g 50/20J Smoking lounges' 70 60 Toilet rooms publics 50/70' Retail stores, sales floors and showroom floors Dressing rooms 025 Mall common areas 40 75 006 Sales 15 75 012 Stuffing andreceiving 2 10 012 Smoking lounges' 70 60 Storage rooms 012 Warehouses (see "Storage") 10 006 (eontimed) 2018 INTERNAT10NAL MECHANICAL CODE® 37 I " ' CITFIghtOO2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dwood mm).(Qtyof FRmdNmod)O,d,,Nomb,, x100e17m8 ocJM 10-0 m. oo PAL(PST) Tug tto ( I.—Ag,,­,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER VENTILATION TABLE 403.3.1.1—continued MINIMUM VENTILATION RATES PEOPLE OUTDOOR AREA OUTDOOR EXHAUST OCCUPANCY CLASSIFICATION OCCUPANT DENSITY #11000 FT" AIRFLOW RATE IN BREATHING ZONE, AIRFLOW RATE IN BREATHING ZONE, AIRFLOW RATE Rp CFMfPERSON R,CFN➢FT2a CFIWFT" Specialty shops Automotive motor -fuel dispensing stations° 1 5 Barber 25 75 006 0 5 Beauty salons° 25 20 012 0 6 Nad salons a h 25 20 012 0 6 Embalming room" 2 0 Pet shops (ammal areas)' 10 75 018 0 9 Supermarkets 8 75 006 Sports and amusement Bowling alleys (seating areas) 40 10 012 Disco/dance floors 100 20 006 Game arcades 20 75 018 Gym, stadium, arena (play area) 7 20 018 Health club/aerobics room 40 20 006 Health club/weight room 10 20 006 Ice arems �thout combustion engines 030 0 5 Spectator areas 150 75 006 Swimming pools (pool and deck area) 048 Storage Repur garages, enclosed parking garages" 075 Refrigerated warehouses/freezers 10 Warehouses 10 006 Theaters Auditoriums (see "Education") Lobbies 150 5 006 Stages, studios 70 10 006 Ticket booths 60 5 006 Transportation Platforms 100 7 5 006 Transportation wutmg 100 7 5 006 (continued) 38 2018 INTERNATIONAL MECHANICAL CODE® S " ' C'p IEItOO?.o,vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf dwood mm).(Qtyof PRmdNmod)O,d,,Nomb,,x10aelvms ocJM 10-0 m. oo PM(PST)pu�rvantto I ( RR I.i AEffi,­,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,Axmboemamhow.d 9e�gleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER VENTILATION TABLE 403.3.1.1—continued MINIMUM VENTILATION RATES OCCUPANCY CLASSIFICATION OCCUPANT DENSITY N1000 FT" PEOPLE OUTDOOR AIRFLOW RATE IN BREATHING ZONE, Rp CFMIPERSON AREA OUTDOOR AIRFLOW RATE IN BREATHING ZONE, R. CFMIFT2a EXHAUST AIRFLOW RATE CFNllFT�a Workrooms Bank vaults/safe deposit 5 5 006 Computer (vnthout printing) 4 5 006 Copy, printing rooms 4 5 006 0 5 Darkrooms 10 Meat processing` 10 15 Pharmacy (prep area) 10 5 018 Photo studios 10 5 012 For SI 1 cubic foot per minute = 0 0004719 m'/s, 1 ton =908 kg, 1 cubic foot per minute per square foot= 0 00508 m'/(s • m'), °C= h-F) - 32]/1 8, 1 square foot= 0 0929 m' a Based on net occupiable floor area b Mechanical exhaust required and the recirculation of air from such spaces is prohibited Recirculation of air that is contained completely within such spaces shall not be prohibited (see Section 403 2 1, Item 3) c Spaces unheated or maintained below 50oF are not covered by these requirements unless the occupancy is continuous d Ventilation systems in enclosed parking garages shall comply with Section 404 e Rates are per water closet or urinal The higher rate shall be provided where the exhaust system is designed to operate intermittently The lower rate shall be permitted only where the exhaust system is designed to operate continuously while occupied f Rates are per room unless otherwise indicated The higher rate shall be provided where the exhaust system is designed to operate intermittently The lower rate shall be permitted only where the exhaust system is designed to operate continuously while occupied g Mechanical exhaust is required and recirculation from such spaces is prohibited except that recirculation shall be permitted where the resulting supply airstream consists ofnotmore than 10 percent air recirculated from these spaces Recirculation of air that is contained completely within such spaces shall not be prohibited (see Section 403 21, Items 2 and 4) It For nail salons, each manicure and pedicure station shall be provided with a source capture system capable of exhausting not less than 50 cfm per station Exhaust inlets shall be located in accordance with Section 50220 Where one or more required source capture systems operate continuously during occupancy, the exhaust rate from such systems shall be permitted to be applied to the exhaust flow rate required by Table 403 3 1 1 for the nail salon 2018 INTERNATIONAL MECHANICAL CODE® 39 I " ' CITFIEItOO2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dv od mm).(Qtyof FRmdNmod)O[d6 Nomb,,x10081vms ocJM 10-0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 40 2018 INTERNATIONAL MECHANICAL CODE® Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 5 EXHAUST SYSTEMS User note: About this chapter., Chapter 5 addresses exhaust systems for among others, kitchens, laboratories, processes, garages, hazardous sys- tems, clothes dryers andsmoke controlsystems. Manyprovisions are linked to the International Fire Code®. Exhaust systems mitigate health and fire hazards by removing and diluting contaminants in buildings. Exhaust system discharge location is also addressed as an important concern. SECTION 501 GENERAL 501.1 Scope. This chapter shall govern the design, construc- tion and installation of mechanical exhaust systems, includ- ing exhaust systems serving clothes dryers and cooking appliances, hazardous exhaust systems, dust, stock and refuse conveyor systems, subslab soil exhaust systems, smoke con- trol systems, energy recovery ventilation systems and other systems specified in Section 502 501.2 Independent system required Single or combined mechanical exhaust systems for environmental air shall be independent of all other exhaust systems Dryer exhaust shall be independent of all other systems Type I exhaust systems shall be independent of all other exhaust systems except as provided in Section 506 3 5 Single or combined Type II exhaust systems for food -processing operations shall be inde- pendent of all other exhaust systems Kitchen exhaust sys- tems shall be constructed in accordance with Section 505 for domestic cooking operations and Sections 506 through 509 for commercial cooking operations 501.3 Exhaust discharge. The air removed by every mechanical exhaust system shall be discharged outdoors at a point where it will not cause a public nuisance and not less than the distances specified in Section 501 3 1 The air shall be discharged to a location from which it cannot again be readily drawn in by a ventilating system Air shall not be exhausted into an attic, crawl space, or be directed onto walk- ways Exceptions: 1 Whole -house ventilation -type attic fans shall be per- mitted to discharge into the attic space of dwelling units having private attics 2 Commercial cooking recirculating systems 3 Where installed in accordance with the manufac- turer's instructions and where mechanical or natural ventilation is otherwise provided in accordance with Chapter 4, listed and labeled domestic ductless range hoods shall not be required to discharge to the outdoors 501.3.1 Location of exhaust outlets. The termination point of exhaust outlets and ducts discharging to the out- doors shall be located with the following minimum dis- tances 1 For ducts conveying explosive or flammable vapors, fumes or dusts 30 feet (9144 mm) from property Imes, 10 feet (3048 mm) from operable openings into buildings, 6 feet (1829 mm) from exterior walls and roofs, 30 feet (9144 mm) from combustible walls and operable openings into buildings that are in the direction of the exhaust discharge, 10 feet (3048 mm) above adjoining grade 2 For other product -conveying outlets 10 feet (3048 mm) from the property Imes, 3 feet (914 mm) from exterior walls and roofs, 10 feet (3048 mm) from operable openings into buildings, 10 feet (3048 mm) above adjoining grade 3 For all environmental air exhaust 3 feet (914 mm) from property lines, 3 feet (914 mm) from operable openings into buildings for all occupancies other than Group U, and 10 feet (3048 mm) from mechan- ical air intakes Such exhaust shall not be considered hazardous or noxious 4 Exhaust outlets serving structures in flood hazard areas shall be installed at or above the elevation required by Section 1612 of the International Build- ing Code for utilities and attendant equipment 5 For specific systems, see the following sections 5 1 Clothes dryer exhaust, Section 504 4 52 Kitchen hoods and other kitchen exhaust equipment, Sections 506 3 13, 506 4 and 5065 53 Dust, stock and refuse conveying systems, Section 511 2 54 Subslab soil exhaust systems, Section 512 4 55 Smoke control systems, Section 513 10 3 56 Refrigerant discharge, Section 1105 7 57 Machinery room discharge, Section 11056 1 501.3.2 Exhaust opening protection. Exhaust openings that terminate outdoors shall be protected with corrosion - resistant screens, louvers or grilles Openings in screens, louvers and grilles shall be sized not less than'/q inch (6 4 mm) and not larger than Yz inch (12 7 mm) Openings shall be protected against local weather conditions Lou- vers that protect exhaust openings in structures located in hurricane -prone regions, as defined in the International Building Code, shall comply with AMCA Standard 550 Outdoor openings located in exterior walls shall meet the 2018 INTERNAT10NAL MECHANICAL CODE® 41 I I 1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) mtto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS provisions for exterior wall opening protectives in accor- dance with the International Building Code 501.4 Pressure equalization. Mechanical exhaust systems shall be sized to remove the quantity of air required by this chapter to be exhausted The system shall operate when air is required to be exhausted Where mechanical exhaust is required in a room or space in other than occupancies in Group R-3 and dwelling units in Group R-2, such space shall be maintained with a neutral or negative pressure If a greater quantity of air is supplied by a mechanical ventilating supply system than is removed by a mechanical exhaust for a room, adequate means shall be provided for the natural or mechani- cal exhaust of the excess air supplied If only a mechanical exhaust system is installed for a room or if a greater quantity of au is removed by a mechanical exhaust system than is sup- plied by a mechanical ventilating supply system for a room, adequate makeup air shall be provided to satisfy the defi- ciency 501.5 Ducts. Where exhaust duct construction is not speci- fied in this chapter, such construction shall comply with Chapter 6 SECTION 502 REQUIRED SYSTEMS 502.1 General. An exhaust system shall be provided, main- tained and operated as specifically required by this section and for all occupied areas where machines, vats, tanks, fur- naces, forges, salamanders and other appliances, equipment and processes in such areas produce or throw off dust or par- ticles sufficiently light to float in the air, or emit heat, odors, fumes, spray, gas or smoke in such quantities so as to be irri- tating or injurious to health or safety 502.1.1 Exhaust location. The inlet to an exhaust system shall be located in the area of heaviest concentration of contaminants [F] 502.1.2 Fuel -dispensing areas. The bottom of an air inlet or exhaust opening in fuel-dispensmg areas shall be located not more than 18 inches (457 mm) above the floor 502.1.3 Equipment, appliance and service rooms. Equipment, appliance and system service rooms that house sources of odors, fumes, noxious gases, smoke, steam, dust, spray or other contaminants shall be designed and constructed so as to prevent spreading of such contam- inants to other occupied parts of the building [F] 502.1.4 Hazardous exhaust. The mechanical exhaust of high concentrations of dust or hazardous vapors shall conform to the requirements of Section 510 [F] 502.2 Aircraft fueling and defueling. Compartments housing piping, pumps, air eliminators, water separators, hose reels and similar equipment used in aircraft fueling and defueling operations shall be adequately ventilated at floor level or within the floor itself [F] 502.4 Stationary storage battery systems. Stationary storage battery systems, as required by Section 1206 2 113 of the International Fire Code, shall be provided with venti- lation in accordance with this chapter and Section 502 4 1 or 50242 The exhaust system shall be designed to provide au move- ment across all parts of the floor for gases having a vapor density greater than au and across all parts of the vault ceiling for gases having a vapor density less than air [F] 502.4.1 Flammability limit in rooms. The ventilation system shall be designed to limit the maximum concentra- tion of flammable gas to 25 percent of the lower flamma- bility limit or, for hydrogen, limit the maximum concentration to 1 0 percent of the total volume of the room [F] 502.4.2 Ventilation rate in rooms. Continuous venti- lation shall be provided at a rate of not less than 1 cubic foot per minute per square foot (cfm/ft) [0 00508 m'/(s • m')] of floor area of the room and not less than 150 cfin (4 25 in'/ in in) [F] 502.4.3 Supervision. Mechanical ventilation systems required by Section 502 4 shall be supervised by an approved central, proprietary or remote station service or shall initiate an audible and visual signal at a constantly attended on -site location [F] 502.5 Ventilation of battery systems in cabinets. Sta- tionary storage battery systems installed in cabinets, as regu- lated by Section 120621131 of the International Fire Code, shall be provided with ventilation in accordance with Section 502 4 [F] 502.6 Dry cleaning plants. Ventilation in dry cleaning plants shall be adequate to protect employees and the public in accordance with this section and DOL 29 CFR Part 1910 1000, where applicable [F] 502.6.1 Type II systems. Type II dry cleaning systems shall be provided with a mechanical ventilation system that is designed to exhaust 1 cubic foot of air per minute for each square foot of floor area (1 cfm/ft) [0 00508 m'/ (s • m')] in dry cleaning rooms and in drying rooms The ventilation system shall operate automatically when the dry cleaning equipment is in operation and shall have man- ual controls at an approved location [F] 502.6.2 Type IV and V systems. Type IV and V dry cleaning systems shall be provided with an automatically activated exhaust ventilation system to maintain an air velocity of not less than 100 feet per minute (0 51 m/s) through the loading door when the door is opened Exception: Dry cleaning units are not required to be provided with exhaust ventilation where an exhaust hood is installed immediately outside of and above the loading door and operates at an airflow rate as follows Q = 100 x Ain (Equation 5-1) [F] 502.3 Battery -charging areas for powered industrial where trucks and equipment. Ventilation shall be provided in an approved manner in battery -charging areas for powered Q = Flow rate exhausted through the hood, cubic feet industrial trucks and equipment to prevent a dangerous accu- per minute mulation of flammable gases Ago = Area of the loading door, square feet 42 2018 INTERNATIONAL MECHANICAL CODE® CopyaghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Dm,(hvdmepf dv odmm).(Qtyof PnmdNmod)O,d,,N=b¢x1ooe1vms 01jan IOZMo m. oo PM (PST) L--tto S I ( I.i Agffi,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,o,,byany ,dputyo,AxmboemPOoossd9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS [F] 502.6.3 Spotting and pretreating. Scrubbing tubs, scouring, brushing or spotting operations shall be located such that solvent vapors are captured and exhausted by the ventilating system [F] 502.7 Application of flammable finishes. Mechanical exhaust as required by this section shall be provided for oper- ations involving the application of flammable finishes [F] 502.7.1 During construction. Ventilation shall be provided for operations involving the application of mate- rials containing flammable solvents in the course of con- struction, alteration or demolition of a structure [F] 502.7.2 Limited spraying spaces. Positive mechani- cal ventilation that provides not less than six complete air changes per hour shall be installed in limited spraying spaces Such system shall meet the requirements of the International Fire Code for handling flammable vapors Explosion venting is not required [F] 502.7.3 Flammable vapor areas. Mechanical ventila- tion of flammable vapor areas shall be provided in accor- dance with Sections 502 7 3 1 through 502 7 3 6 [F] 502.7.3.1 Operation. Mechanical ventilation shall be kept in operation at all times while spraying opera- tions are being conducted and for a sufficient time thereafter to allow vapors from drying coated articles and finishing material residue to be exhausted Spray- ing equipment shall be interlocked with the ventilation of the flammable vapor area such that spraying opera- tions cannot be conducted unless the ventilation system is in operation [F] 502.7.3.2 Recirculation. Au exhausted from spray- ing operations shall not be recirculated Exceptions: 1 Au exhausted from spraying operations shall be pernutted to be recirculated as makeup air for unmanned spray operations provided that 11 The solid particulate has been removed 12 The vapor concentration is less than 25 percent of the lower flammable limit (LFL) 13 Approved equipment is used to moni- tor the vapor concentration 14 An alarm is sounded and spray opera- tions are automatically shut down if the vapor concentration exceeds 25 percent of the LFL 15 In the event of shutdown of the vapor concentration monitor, 100 percent of the air volume specified in Section 510 is automatically exhausted 2 Au exhausted from spraying operations is allowed to be recirculated as makeup air to manned spraying operations where all of the conditions provided in Exception 1 are included in the installation and documents have been prepared to show that the mstalla- tion does not pose a life safety hazard to per- sonnel inside the spray booth, spraying space or spray room [F] 502.7.3.3 Air velocity. The ventilation system shall be designed, installed and maintained so that the flam- mable contaminants are diluted in noncontammated air to maintain concentrations in the exhaust air flow below 25 percent of the contaminant's lower flamma- ble lunit (LFL) In addition, the spray booth shall be provided with mechanical ventilation so that the aver- age air velocity through openings is in accordance with Sections 502 7 3 3 1 and 502 7 3 3 2 [F] 502.7.3.3.1 Open face or open front spray booth. For spray application operations conducted in an open face or open front spray booth, the venti- lation system shall be designed, installed and main- tained so that the average au velocity into the spray booth through all openings is not less than 100 feet per minute (0 51 m/s) Exception: For fixed or automated electrostatic spray application equipment, the average au velocity into the spray booth through all openings shall be not less than 50 feet per minute (0 25 m/s) [F] 502.7.3.3.2 Enclosed spray booth or spray room with openings for product conveyance. For spray application operations conducted in an enclosed spray booth or spray room with openings for product conveyance, the ventilation system shall be designed, installed and maintained so that the average air velocity into the spray booth through openings is not less than 100 feet per minute (0 51 m/s) Exceptions: 1 For fixed or automated electrostatic spray application equipment, the average air velocity into the spray booth through all openings shall be not less than 50 feet per minute (0 25 m/s) 2 Where methods are used to reduce cross drafts that can draw vapors and overspray through openings from the spray booth or spray room, the average air velocity into the spray booth or spray room shall be that necessary to capture and confine vapors and overspray to the spray booth or spray room [F] 502.7.3.4 Ventilation obstruction. Articles being sprayed shall be positioned in a manner that does not obstruct collection of overspray [F] 502.7.3.5 Independent ducts. Each spray booth and spray room shall have an independent exhaust duct system discharging to the outdoors Exceptions: 1 Multiple spray booths having a combined frontal area of 18 square feet (1 67 m) or less are allowed to have a common exhaust where 2018 INTERNAT10NAL MECHANICAL CODE® 43 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS identical spray -finishing material is used in each booth If more than one fan serves one booth, such fans shall be interconnected so that all fans operate simultaneously 2 Where treatment of exhaust is necessary for air pollution control or energy conservation, ducts shall be allowed to be manifolded if all of the following conditions are met 21 The sprayed materials used are com- patible and will not react or cause igni- tion of the residue in the ducts 22 Nitrocellulose -based finishing material shall not be used 23 A filtering system shall be provided to reduce the amount of overspray carried into the duct manifold 2 4 Automatic sprinkler protection shall be provided at the junction of each booth exhaust with the manifold, in addition to the protection required by this chap- ter [F] 502.7.3.6 Fan motors and belts. Electric motors driving exhaust fans shall not be placed inside booths or ducts Fan rotating elements shall be nonferrous or nonsparkmg or the casing shall consist of, or be lmed with, such material Belts shall not enter the duct or booth unless the belt and pulley within the duct are tightly enclosed [F] 502.7.4 Dipping operations. Flammable vapor areas of dip tank operations shall be provided with mechanical ventilation adequate to prevent the dangerous accumula- tion of vapors Required ventilation systems shall be so arranged that the failure of any ventilating fan will auto- matically stop the dipping conveyor system [F] 502.7.5 Electrostatic apparatus. The flammable vapor area in spray-fmislung operations involving electro- static apparatus and devices shall be ventilated in accor- dance with Section 502 7 3 [F] 502.7.6 Powder coating. Exhaust ventilation for pow- der -coating operations shall be sufficient to maintain the atmosphere below one-half of the minimum explosive concentration for the material being applied Nondepos- Jted, air -suspended powders shall be removed through exhaust ducts to the powder recovery system [F] 502.7.7 Floor resurfacing operations. To prevent the accumulation of flammable vapors during floor resurfac- ing operations, mechanical ventilation at a mimmum rate of 1 cfm/ft' [0 00508 m'/(s • m)] of area being finished shall be provided Such exhaust shall be by approved tem- porary or portable means Vapors shall be exhausted to the outdoors [F] 502.8 Hazardous materials —general requirements. Exhaust ventilation systems for structures containing hazard- ous materials shall be provided as required in Sections 502 8 1 through 502 8 5 [F] 502.8.1 Storage in excess of the maximum allowable quantities. Indoor storage areas and storage buildings for hazardous materials in amounts exceeding the maximum allowable quantity per control area shall be provided with mechanical exhaust ventilation or natural ventilation where natural ventilation can be shown to be acceptable for the materials as stored Exceptions: 1 Storage areas for flammable solids complying with Section 5904 of the International Fire Code 2 Storage areas and storage buildings for fireworks and explosives complying with Chapter 56 of the International Fire Code [F] 502.8.1.1 System requirements. Exhaust ventila- tion systems shall comply with all of the following 1 The installation shall be in accordance with this code 2 Mechanical ventilation shall be provided at a rate of not less than 1 cfm per square foot [0 00508 m'/(s • m')] of floor area over the storage area 3 The systems shall operate continuously unless alternate designs are approved 4 A manual shutoff control shall be provided out- side of the room in a position adjacent to the access door to the room or in another approved location The switch shall be a break -glass or other approved type and shall be labeled VENTILATION SYSTEM EMERGENCY SHUTOFF 5 The exhaust ventilation shall be designed to con- sider the density of the potential fumes or vapors released For fumes or vapors that are heavier than air, exhaust shall be taken from a point within 12 inches (305 mm) of the floor For fumes or vapors that are lighter than air, exhaust shall be taken from a point within 12 inches (305 mm) of the highest point of the room 6 The location of both the exhaust and mlet au openings shall be designed to provide air move- ment across all portions of the floor or room to prevent the accumulation of vapors 7 The exhaust air shall not be recirculated to occu- pied areas if the materials stored are capable of emitting hazardous vapors and contaminants have not been removed Au contaminated with explosive or flammable vapors, fumes or dusts, flammable, highly toxic or toxic gases, or radio- active materials shall not be recirculated [F] 502.8.2 Gas rooms, exhausted enclosures and gas cabinets. The ventilation system for gas rooms, exhausted enclosures and gas cabinets for any quantity of hazardous material shall be designed to operate at a negative pressure in relation to the surrounding area Highly toxic and toxic gases shall comply with Sections 502 9 7 1, 502 9 7 2 and 502984 [F] 502.8.3 Indoor dispensing and use. Indoor dispens- ing and use areas for hazardous materials in amounts exceeding the maximum allowable quantity per control 44 2018 INTERNATIONAL MECHANICAL CODE' 11 1 Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS area shall be provided with exhaust ventilation in accor- dance with Section 502 8 1 Exception: Ventilation is not required for dispensing and use of flammable solids other than finely divided particles [F] 502.8.4 Indoor dispensing and use point sources. Where gases, liquids or solids in amounts exceeding the maximum allowable quantity per control area and having a hazard ranking of 3 or 4 in accordance with NFPA 704 are dispensed or used, mechanical exhaust ventilation shall be provided to capture gases, fumes, mists or vapors at the point of generation Exception: Where it can be demonstrated that the gases, liquids or solids do not create harmful gases, fumes, mists or vapors [F] 502.8.5 Closed systems. Where closed systems for the use of hazardous materials in amounts exceeding the max- imum allowable quantity per control area are designed to be opened as part of normal operations, ventilation shall be provided in accordance with Section 502 8 4 [F] 502.9 Hazardous materials —requirements for specific materials. Exhaust ventilation systems for specific hazardous materials shall be provided as required in Section 502 8 and Sections 502 9 1 through 502 9 11 [F] 502.9.1 Compressed gases —medical gas systems. Rooms for the storage of compressed medical gases in amounts exceeding the permit amounts for compressed gases in the International Fire Code, and that do not have an exterior wall, shall be exhausted through a duct to the exterior of the building Both separate airstreams shall be enclosed in a 1-hour-rated shaft enclosure from the room to the exterior Approved mechanical ventilation shall be pro- vided at a minimum rate of 1 cfm/ft' [0 00508 m'/(s • m)] of the area of the room Gas cabinets for the storage of compressed medical gases in amounts exceeding the permit amounts for com- pressed gases in the International Fire Code shall be con- nected to an exhaust system The average velocity of ventilation at the face of access ports or windows shall be not less than 200 feet per minute (1 02 m/s) with a mini- mum velocity of 150 feet per minute (076 m/s) at any point at the access port or window [F] 502.9.2 Corrosives. Where corrosive materials in amounts exceeding the maximum allowable quantity per control area are dispensed or used, mechanical exhaust ventilation in accordance with Section 502 8 4 shall be provided [F] 502.9.3 Cryogenics. Storage areas for stationary or portable containers of cryogenic fluids in any quantity shall be ventilated in accordance with Section 502 8 Indoor areas where cryogenic fluids in any quantity are dispensed shall be ventilated in accordance with the requirements of Section 502 8 4 in a manner that captures any vapor at the point of generation Exception: Ventilation for indoor dispensing areas is not required where it can be demonstrated that the cryo- genic fluids do not create harmful vapors [F] 502.9.4 Explosives. Squirrel cage blowers shall not be used for exhausting hazardous fumes, vapors or gases in operating buildings and rooms for the manufacture, assembly or testing of explosives Only nonferrous fan blades shall be used for fans located within the ductwork and through which hazardous materials are exhausted Motors shall be located outside the duct [F] 502.9.5 Flammable and combustible liquids. Exhaust ventilation systems shall be provided as required by Sections 502 9 5 1 through 502 9 5 5 for the storage, use, dispensing, mixing and handling of flammable and combustible liquids Unless otherwise specified, this sec- tion shall apply to any quantity of flammable and combus- tible liquids Exception: This section shall not apply to flammable and combustible liquids that are exempt from the Inter- national Fire Code [F] 502.9.5.1 Vaults. Vaults that contain tanks of Class I liquids shall be provided with continuous ventilation at a rate of not less than 1 cfm/ft' of floor area [0 00508 m'/(s • m)], but not less than 150 cfm (4 25 m'/min) Failure of the exhaust airflow shall automatically shut down the dispensing system The exhaust system shall be designed to provide air movement across all parts of the vault floor Supply and exhaust ducts shall extend to a point not greater than 12 inches (305 mm) and not less than 3 inches (76 mm) above the floor The exhaust system shall be installed in accordance with the provi- sions of NFPA 91 Means shall be provided to automat- ically detect any flammable vapors and to automatically shut down the dispensing system upon detection of such flammable vapors in the exhaust duct at a concentration of 25 percent of the LFL [F] 502.9.5.2 Storage rooms and warehouses. Liquid storage rooms and liquid storage warehouses for quan- tities of liquids exceeding those specified in the Inter- national Fire Code shall be ventilated in accordance with Section 502 8 1 [F] 502.9.5.3 Cleaning machines. Areas containing machines used for parts cleaning in accordance with the International Fire Code shall be adequately ventilated to prevent accumulation of vapors [F] 502.9.5.4 Use, dispensing and mixing. Continuous mechanical ventilation shall be provided for the use, dispensing and mixing of flammable and combustible liquids in open or closed systems in amounts exceeding the maximum allowable quantity per control area and for bulk transfer and process transfer operations The ventilation rate shall be not less than 1 cfm/ft' [0 00508 m'/(s • m)] of floor area over the design area Provi- sions shall be made for the introduction of makeup air in a manner that will include all floor areas or pits where vapors can collect Local or spot ventilation shall be provided where needed to prevent the accumulation of hazardous vapors Exception: Where natural ventilation can be shown to be effective for the materials used, dispensed or mixed 2018 INTERNAT10NAL MECHANICAL CODE® 45 I 1 1 1 CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.i—Ag,, ^®,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS [F] 502.9.5.5 Bulk plants or terminals. Ventilation shall be provided for portions of properties where flam- mable and combustible liquids are received by tank vessels, pipelines, tank cars or tank vehicles and are stored or blended in bulk for the purpose of distributing such liquids by tank vessels, pipelines, tank cars, tank vehicles or containers as required by Sections 502 9 5 5 1 through 502 9 5 5 3 [F] 502.9.5.5.1 General. Ventilation shall be pro- vided for rooms, buildings and enclosures in which Class I liquids are pumped, used or transferred Design of ventilation systems shall consider the rel- atively high specific gravity of the vapors Where natural venhlahon is used, adequate openings in outside walls at floor level, unobstructed except by louvers or coarse screens, shall be provided Where natural venhlahon is inadequate, mechanical venti- lation shall be provided [F] 502.9.5.5.2 Basements and pits. Class I liquids shall not be stored or used within a building having a basement or pit into which flammable vapors can travel, unless such area is provided with ventilation designed to prevent the accumulation of flammable vapors therein [F] 502.9.5.5.3 Dispensing of Class I liquids. Con - tamers of Class I liquids shall not be drawn from or filled within buildings unless a provision is made to prevent the accumulation of flammable vapors in hazardous concentrations Where mechanical venti- lation is required, it shall be kept in operation while flammable vapors could be present [F] 502.9.6 Highly toxic and toxic liquids. Ventilation exhaust shall be provided for highly toxic and toxic liquids as required by Sections 502 9 6 1 and 502 9 6 2 [F] 502.9.6.1 Treatment system. This provision shall apply to indoor and outdoor storage and use of highly toxic and toxic liquids in amounts exceeding the maxi- mum allowable quantities per control area Exhaust scrubbers or other systems for processing vapors of highly toxic liquids shall be provided where a spill or accidental release of such liquids can be expected to release highly toxic vapors at normal temperature and pressure [F] 502.9.6.2 Open and closed systems. Mechanical exhaust ventilation shall be provided for highly toxic and toxic liquids used in open systems in accordance with Section 502 8 4 Mechanical exhaust ventilation shall be provided for highly toxic and toxic liquids used in closed systems in accordance with Section 502 8 5 Exception: Liquids or solids that do not generate highly toxic or toxic fumes, mists or vapors [F] 502.9.7 Highly toxic and toxic compressed gases — any quantity. Ventilation exhaust shall be provided for highly toxic and toxic compressed gases in any quantity as required by Sections 502 9 7 1 and 502 9 7 2 [F] 502.9.7.1 Gas cabinets. Gas cabinets containing highly toxic or toxic compressed gases in any quantity shall comply with Section 502 8 2 and the following requirements 1 The average ventilation velocity at the face of gas cabinet access ports or windows shall be not less than 200 feet per minute (1 02 m/s) with a mini- mum velocity of 150 feet per minute (0 76 m/s) at any point at the access port or window 2 Gas cabinets shall be connected to an exhaust system 3 Gas cabinets shall not be used as the sole means of exhaust for any room or area [F] 502.9.7.2 Exhausted enclosures. Exhausted enclo- sures containing highly toxic or toxic compressed gases in any quantity shall comply with Section 502 8 2 and the following requirements 1 The average ventilation velocity at the face of the enclosure shall be not less than 200 feet per min- ute (1 02 m/s) with a minimum velocity of 150 feet per minute (0 76 m/s) 2 Exhausted enclosures shall be connected to an exhaust system 3 Exhausted enclosures shall not be used as the sole means of exhaust for any room or area [F] 502.9.8 Highly toxic and toxic compressed gases — quantities exceeding the maximum allowable quantity per control area. Ventilation exhaust shall be provided for highly toxic and toxic compressed gases in amounts exceeding the maximum allowable quantities per control area as required by Sections 502 9 8 1 through 502 9 8 6 [F] 502.9.8.1 Ventilated areas. The room or area in which indoor gas cabinets or exhausted enclosures are located shall be provided with exhaust ventilation Gas cabinets or exhausted enclosures shall not be used as the sole means of exhaust for any room or area [F] 502.9.8.2 Local exhaust for portable tanks. A means of local exhaust shall be provided to capture leakage from indoor and outdoor portable tanks The local exhaust shall consist of portable ducts or collec- tion systems designed to be applied to the site of a leak in a valve or fitting on the tank The local exhaust sys- tem shall be located in a gas room Exhaust shall be directed to a treatment system where required by the Internahonal Fire Code [F] 502.9.8.3 Piping and controls —stationary tanks. Filling or dispensing connections on indoor stationary tanks shall be provided with a means of local exhaust Such exhaust shall be designed to capture fumes and vapors The exhaust shall be directed to a treatment system where required by the International Fire Code [F] 502.9.8.4 Gas rooms. The ventilation system for gas rooms shall be designed to operate at a negative pressure in relation to the surrounding area The exhaust ventilation from gas rooms shall be directed to an exhaust system [F] 502.9.8.5 Treatment system. The exhaust ventila- tion from gas cabinets, exhausted enclosures and gas 46 2018 INTERNATIONAL MECHANICAL CODE® iffff., Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto 1173111111,117 RR I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGRE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS rooms, and local exhaust systems required in Sections 502 9 8 2 and 502 9 8 3 shall be directed to a treatment system where required by the International Fire Code [F] 502.9.8.6 Process equipment. Effluent from indoor and outdoor process equipment containing highly toxic or toxic compressed gases which could be discharged to the atmosphere shall be processed through an exhaust scrubber or other processing sys- tem Such systems shall be in accordance with the International Fire Code [F] 502.9.9 Ozone gas generators. Ozone cabinets and ozone gas -generator rooms for systems having a maxi- mum ozone -generating capacity of Yz pound (0 23 kg) or more over a 24-hour period shall be mechanically venti- lated at a rate of not less than six air changes per hour For cabinets, the average velocity of ventilation at makeup air openings with cabinet doors closed shall be not less than 200 feet per minute (1 02 m/s) [F] 502.9.10 LP -gas distribution facilities. LP -gas distri- bution facilities shall be ventilated in accordance with NFPA 58 [F] 502.9.10.1 Portable container use. Above -grade underfloor spaces or basements in which portable LP - gas containers are used or are stored awaiting use or resale shall be provided with an approved means of ventilation Exception: Department of Transportation (DOT) specification cylinders with a maximum water capacity of 2 7 pounds (1 2 kg) for use in completely self-contained hand torches and similar applications The quantity of LP -gas shall not exceed 20 pounds (9 kg) [F] 502.9.11 Silane gas. Exhausted enclosures and gas cabinets for the indoor storage of Silane gas in amounts exceeding the maximum allowable quantities per control area shall comply with Chapter 64 of the International Fire Code [F] 502.10 Hazardous production materials (HPM). Exhaust ventilation systems and materials for ducts utilized for the exhaust of HPM shall comply with this section, other applicable provisions of this code, the International Building Code and the International Fire Code [F] 502.10.1 Where required. Exhaust ventilation sys- tems shall be provided in the following locations in accor- dance with the requirements of this section and the International Building Code 1 Fabrication areas Exhaust ventilation for fabrication areas shall comply with the International Building Code Additional manual control switches shall be provided where required by the code official 2 Workstations A ventilation system shall be pro- vided to capture and exhaust gases, fumes and vapors at workstations 3 Liquid storage rooms Exhaust ventilation for liquid storage rooms shall comply with Section 502 8 1 1 and the International Building Code. 4 HPM rooms Exhaust ventilation for HPM rooms shall comply with Section 502 8 1 1 and the Interna- tional Building Code. 5 Gas cabinets Exhaust ventilation for gas cabinets shall comply with Section 502 8 2 The gas cabinet ventilation system is allowed to connect to a work- station ventilation system Exhaust ventilation for gas cabinets containing highly toxic or toxic gases shall also comply with Sections 502 9 7 and 502 9 8 6 Exhausted enclosures Exhaust ventilation for exhausted enclosures shall comply with Section 502 8 2 Exhaust ventilation for exhausted enclo- sures containing highly toxic or toxic gases shall also comply with Sections 502 9 7 and 502 9 8 7 Gas rooms Exhaust ventilation for gas rooms shall comply with Section 502 8 2 Exhaust ventilation for gas rooms containing highly toxic or toxic gases shall also comply with Sections 502 9 7 and 502 9 8 8 Cabinets containing pyrophoric liquids or Class 3 water -reactive liquids Exhaust ventilation for cabi- nets in fabrication areas containing pyrophoric liq- uids shall be as required in Section 2705 2 3 4 of the International Fire Code. [F] 502.10.2 Penetrations. Exhaust ducts penetrating fire barriers constructed in accordance with Section 707 of the International Building Code or horizontal assemblies con- structed in accordance with Section 711 of the Interna- tional Building Code shall be contained in a shaft of equivalent fire -resistance -rated construction Exhaust ducts shall not penetrate fire walls Fire dampers shall not be installed in exhaust ducts [F] 502.10.3 Treatment systems. Treatment systems for highly toxic and toxic gases shall comply with the Interna- tional Fire Code. 502.11 Motion picture projectors. Motion picture projec- tors shall be exhausted in accordance with Section 502 11 1 or 502 11 2 502.11.1 Projectors with an exhaust discharge. Projec- tors equipped with an exhaust discharge shall be directly connected to a mechanical exhaust system The exhaust system shall operate at an exhaust rate as indicated by the manufacturer's installation instructions 502.11.2 Projectors without exhaust connection. Projec- tors without an exhaust connection shall have contami- nants exhausted through a mechanical exhaust system The exhaust rate for electric are projectors shall be not less than 200 cubic feet per minute (cfm) (0 09 m'/s) per lamp The exhaust rate for xenon projectors shall be not less than 300 cfin (0 14 m'/s) per lamp Xenon projector exhaust shall be at a rate such that the exterior temperature of the lamp housing does not exceed 130'F (54'C) The lamp and projection room exhaust systems, whether combined or independent, shall not be interconnected with any other exhaust or return system within the building [F] 502.12 Organic coating processes. Enclosed structures involving organic coating processes in which Class I liquids 2018 INTERNAT10NAL MECHANICAL CODE® 47 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS are processed or handled shall be ventilated at a rate of not less than 1 cfm/ft' [0 00508 m'/(s • m)] of solid floor area Ventilation shall be accomplished by exhaust fans that intake at floor levels and discharge to a safe location outside the structure Noncontaminated intake air shall be introduced in such a manner that all portions of solid floor areas are pro- vided with continuous uniformly distributed air movement 502.13 Public garages. Mechanical exhaust systems for pub- lic garages, as required in Chapter 4, shall operate continu- ously or in accordance with Section 404 502.14 Motor vehicle operation. In areas where motor vehi- cles operate, mechanical ventilation shall be provided in accordance with Section 403 Additionally, areas in which stationary motor vehicles are operated shall be provided with a source capture system that connects directly to the motor vehicle exhaust systems Such system shall be engineered by a registered design professional or shall be factory -built equipment designed and sized for the purpose Exceptions: 1 This section shall not apply where the motor vehi- cles being operated or repaired are electrically pow- ered 2 This section shall not apply to one- and two-family dwellings 3 This section shall not apply to motor vehicle service areas where engines are operated inside the building only for the duration necessary to move the motor vehicles in and out of the building [F] 502.15 Repair garages. Where Class I liquids or LP -gas are stored or used within a bwldmg having a basement or pit wherein flammable vapors could accumulate, the basement or pit shall be provided with ventilation designed to prevent the accumulation of flammable vapors therein [F] 502.16 Repair garages for vehicles fueled by lighter - than -air fuels. Repair garages used for the conversion and repair of vehicles that use compressed natural gas, liquefied natural gas, hydrogen or other lighter -than -air motor fuels shall be provided with an approved mechanical exhaust ven- tilation system The mechanical exhaust ventilation system shall be in accordance with Section 502 16 1 or 502 16 2 as applicable Exceptions: 1 Repair garages where work is not performed on the fuel system and is limited to exchange of parts and maintenance not requiring open flame or welding on the compressed natural gas, liquefied natural gas, hydrogen or other lighter -than -air -fueled motor vehicle 2 Repair garages for hydrogen -fueled vehicles where work is not performed on the hydrogen storage tank and is limited to the exchange of parts and mainte- nance not requiring open flame or welding on the hydrogen -fueled vehicle During the work, the entire hydrogen fuel system shall contain a quantity of hydrogen that is less than 200 cubic feet (5 6 m') [F] 502.16.1 Repair garages for hydrogen -fueled vehi- cles. Repair garages used for the repair of hydrogen -fueled velucles shall be provided with an approved exhaust venti- lation system in accordance with this code and Chapter 6 I of NFPA 2 [F] 502.16.2 Exhaust ventilation system. Repair garages used for the repair of compressed natural gas, liquefied natural gas or other lighter -than -air motor fuel, other than hydrogen, shall be provided with an approved mechanical exhaust ventilation system The mechanical exhaust venti- lation system shall be in accordance with this code and Sections 502 16 2 1 and 502 16 2 2 Exception: Where approved, natural ventilation shall be an alternative to mechanical exhaust ventilation [F] 502.16.2.1 Design. For indoor locations, air supply mlets and exhaust outlets for mechanical ventilation shall be arranged to provide uniformly distributed air movement with inlets uniformly arranged on walls near floor level and outlets located at the high point of the room in walls or the roof Failure of the exhaust ventilation system shall cause the fueling system to shut down The exhaust ventilation rate shall be not less than 1 cubic foot per minute (0 03 m'/min) per 12 cubic feet (0 34 m') of room volume [F] 502.16.2.2 Operation. The mechanical exhaust I ventilation system shall operate continuously Exceptions: 1 Mechanical exhaust ventilation systems that are interlocked with a gas detection system designed in accordance with the International Fire Code 2 Mechanical exhaust ventilation systems in garages that are used only for the repair of vehicles fueled by liquid fuels or odorized gases, such as compressed natural gas, where the exhaust ventilation system is electrically interlocked with the lighting circuit 502.17 Tire rebuilding or recapping. Each room where rub- ber cement is used or mixed, or where flammable or combus- tible solvents are applied, shall be ventilated in accordance with the applicable provisions of NFPA 91 502.17.1 Buffing machines. Each buffing machine shall be connected to a dust -collecting system that prevents the accumulation of the dust produced by the buffing process 502.18 Specific rooms. Specific rooms, including bath- rooms, locker rooms, smoking lounges and toilet rooms, shall be exhausted in accordance with the ventilation requirements of Chapter 4 502.19 Indoor firing ranges. Ventilation shall be provided in an approved manner in areas utilized as indoor firing ranges Ventilation shall be designed to protect employees and the public in accordance with DOL 29 CFR 1910 1025 where applicable 502.20 Manicure and pedicure stations. Manicure and ped- icure stations shall be provided with an exhaust system in accordance with Table 403 3 1 1, Note h Manicure tables and pedicure stations not provided with factory -installed 48 2018 INTERNATIONAL MECHANICAL CODE® 11 1 C'p IEhtOo2.01vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS exhaust inlets shall be provided with exhaust inlets located not more than 12 inches (305 mm) horizontally and vertically from the point of chemical application SECTION 503 MOTORS AND FANS 503.1 General. Motors and fans shall be sized to provide the required air movement Motors in areas that contain flamma- ble vapors or dusts shall be of a type approved for such envi- ronments A manually operated remote control installed at an approved location shall be provided to shut off fans or blow- ers in flammable vapor or dust systems Electrical equipment and appliances used in operations that generate explosive or flammable vapors, fumes or dusts shall be interlocked with the ventilation system so that the equipment and appliances cannot be operated unless the ventilation fans are in opera- tion Motors for fans used to convey flammable vapors or dusts shall be located outside the duct or shall be protected with approved shields and dustproofing Motors and fans shall be provided with a means of access for servicing and maintenance 503.2 Fans. Parts of fans in contact with explosive or flam- mable vapors, fumes or dusts shall be of nonferrous or non - sparking materials, or their casing shall be lined or constructed of such material Where the size and hardness of materials passing through a fan are capable of producing a spark, both the fan and the casing shall be of nonsparking materials Where fans are required to be spark resistant, their bearings shall not be within the airstream, and all parts of the fan shall be grounded Fans in systems -handling materials that are capable of clogging the blades, and fans in buffing or woodworking exhaust systems, shall be of the radial -blade or tube -axial type 503.3 Equipment and appliance identification plate. Equipment and appliances used to exhaust explosive or flam- mable vapors, fumes or dusts shall bear an identification plate stating the ventilation rate for which the system was designed 503.4 Corrosion -resistant fans. Fans located in systems conveying corrosives shall be of materials that are resistant to the corrosive or shall be coated with corrosion -resistant mate- rials SECTION 504 CLOTHES DRYER EXHAUST 504.1 Installation. Clothes dryers shall be exhausted in accordance with the manufacturer's instructions Dryer exhaust systems shall be independent of all other systems and shall convey the moisture and any products of combustion to the outside of the building Exception: This section shall not apply to listed and labeled condensing (ductless) clothes dryers 504.2 Exhaust penetrations. Where a clothes dryer exhaust duct penetrates a wall or ceiling membrane, the annular space shall be sealed with noncombustible material, approved fire caulking or a noncombustible dryer exhaust duct wall recep- tacle Ducts that exhaust clothes dryers shall not penetrate or be located within any fireblocking, draftstopping or any wall, floor/ceiling or other assembly required by the International Building Code to be fire -resistance rated, unless such duct is constructed of galvanized steel or aluminum of the thickness specified in Section 603 4 and the fire -resistance rating is maintained in accordance with the International Building Code Fire dampers, combination fire/smoke dampers and any similar devices that will obstruct the exhaust flow shall be prohibited in clothes dryer exhaust ducts 504.3 Cleanout. Each vertical riser shall be provided with a means for cleanout 504.4 Exhaust installation. Dryer exhaust ducts for clothes dryers shall term mate on the outside of the building and shall be equipped with a backdraft damper Screens shall not be installed at the duct termination Ducts shall not be connected or installed with sheet metal screws or other fasteners that will obstruct the exhaust flow Clothes dryer exhaust ducts shall not be connected to a vent connector, vent or chimney Clothes dryer exhaust ducts shall not extend into or through ducts or plenums Clothes dryer exhaust ducts shall be sealed in accordance with Section 603 9 504.4.1 Exhaust termination outlet and passageway size. The passageway of dryer exhaust duct terminals shall be undiminished in size and shall provide an open area of not less than 12 5 square inches (8065 mm') 504.5 Dryer exhaust duct power ventilators. Domestic dryer exhaust duct power ventilators shall be listed and labeled to UL 705 for use in dryer exhaust duct systems The dryer exhaust duct power ventilator shall be installed in accordance with the manufacturer's instructions 504.6 Makeup air. Installations exhausting more than 200 cfm (0 09 m'/s) shall be provided with makeup air Where a closet is designed for the installation of a clothes dryer, an opening having an area of not less than 100 square inches (0 0645 m') shall be provided in the closet enclosure or makeup air shall be provided by other approved means 504.7 Protection required. Protective shield plates shall be placed where nails or screws from finish or other work are likely to penetrate the clothes dryer exhaust duct Slueld plates shall be placed on the finished face of all framing members where there is less than V/4 inches (32 mm) between the duct and the finished face of the framing mem- ber Protective shield plates shall be constructed of steel, have a thickness of 0 062 inch (1 6 mm) and extend not less than 2 inches (51 mm) above sole plates and below top plates 504.8 Domestic clothes dryer ducts. Exhaust ducts for domestic clothes dryers shall conform to the requirements of Sections 504 8 1 through 504 8 6 504.8.1 Material and size. Exhaust ducts shall have a smooth interior finish and shall be constructed of metal not less than 0 016 inch (0 4 mm) in thickness The exhaust duct size shall be 4 inches (102 mm) nominal in diameter 504.8.2 Duct installation. Exhaust ducts shall be sup- ported at 4-foot (1219 mm) intervals and secured in place The insert end of the duct shall extend into the adjoining duct or fitting in the direction of airflow Ducts shall not 2018 INTERNAT10NAL MECHANICAL CODE® 49 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS be joined with screws or similar fasteners that protrude more than'/g inch (3 2 mm) into the inside of the duct Where dryer exhaust ducts are enclosed in wall or ceil- ing cavities, such cavities shall allow the installation of the duct without deformation 504.8.3 Transition ducts. Transition ducts used to con- nect the dryer to the exhaust duct system shall be a single length that is listed and labeled in accordance with UL 2158A Transition ducts shall be not greater than 8 feet (2438 mm) in length and shall not be concealed within construction 504.8.4 Duct length. The maximum allowable exhaust duct length shall be detenmmed by one of the methods specified in Sections 504 8 4 1 through 504 8 4 3 504.8.4.1 Specified length. The maximum length of the exhaust duct shall be 35 feet (10 668 mm) from the connection to the transition duct from the dryer to the outlet terminal Where fittings are used, the maximum length of the exhaust duct shall be reduced in accor- dance with Table 504 8 4 1 504.8.4.2 Manufacturer's instructions. The maxi- mum length of the exhaust duct shall be determined by the dryer manufacturer's installation instructions The code official shall be provided with a copy of the instal- lation instructions for the make and model of the dryer Where the exhaust duct is to be concealed, the installa- tion instructions shall be provided to the code official prior to the concealment inspection In the absence of fitting equivalent length calculations from the clothes dryer manufacturer, Table 504 8 4 1 shall be used 504.8.4.3 Dryer exhaust duct power ventilator length. The maximum length of the exhaust duct shall be determined by the dryer exhaust duct power ventila- tor manufacturer's installation instructions 504.8.5 Length identification. Where the exhaust duct equivalent length exceeds 35 feet (10 668 mm), the equiv- alent length of the exhaust duct shall be identified on a permanent label or tag The label or tag shall be located within 6 feet (1829 mm) of the exhaust duct connection 504.8.6 Exhaust duct required. Where space for a clothes dryer is provided, an exhaust duct system shall be installed Where the clothes dryer is not installed at the time of occupancy, the exhaust duct shall be capped at the location of the future dryer Exception: Where a listed condensing clothes dryer is installed prior to occupancy of structure 504.9 Commercial clothes dryers. The installation of dryer exhaust ducts serving commercial clothes dryers shall com- ply with the appliance manufacturer's installation mstruc- tions Exhaust fan motors installed in exhaust systems shall be located outside of the airstream In multiple installations, the fan shall operate continuously or be interlocked to operate when any individual unit is operating Ducts shall have a min- imum clearance of 6 inches (152 mm) to combustible materi- als Clothes dryer transition ducts used to connect the appliance to the exhaust duct system shall be limited to single lengths not to exceed 8 feet (2438 mm) in length and shall be listed and labeled for the application Transition ducts shall not be concealed within construction 504.10 Common exhaust systems for clothes dryers located in multistory structures. Where a common multi- story duct system is designed and installed to convey exhaust from multiple clothes dryers, the construction of the system shall be in accordance with all of the following 1 The shaft in which the duct is installed shall be con- structed and fire -resistance rated as required by the International Builckng Code 2 Dampers shall be prolubited in the exhaust duct Pen- etrations of the shaft and ductwork shall be protected in accordance with Section 607 5 5, Exception 2 3 Rigid metal ductwork shall be installed within the shaft to convey the exhaust The ductwork shall be constructed of sheet steel having a minimum thick- ness of 0 0187 mch (0 4712 mm) (No 26 gage) and m accordance with SMACNA Duct Construction Stan- dards 4 The ductwork within the shaft shall be designed and installed without offsets 5 The exhaust fan motor design shall be in accordance with Section 503 2 6 The exhaust fan motor shall be located outside of the airstream 7 The exhaust fan shall run continuously, and shall be connected to a standby power source 8 Exhaust fan operation shall be monitored in an approved location and shall initiate an audible or visual signal when the fan is not in operation 9 Makeup air shall be provided for the exhaust system 10 A cleanout opening shall be located at the base of the shaft to provide access to the duct to allow for clean- ing and inspection The finished opening shall be not less than 12 inches by 12 inches (305 mm by 305 mm) 11 Screens shall not be installed at the termination 12 The common multistory duct system shall serve only clothes dryers and shall be independent of other exhaust systems TABLE 504.8.4.1 DRYER EXHAUST DUCT FITTING EQUIVALENT LENGTH DRYER EXHAUST DUCT FITTING TYPE EQUIVALENT LENGTH 4" radius mitered 45-degree elbow 2 feet 6 inches 4" radius mitered 90-degree elbow 5 feet 6" radius smooth 45-degree elbow 1 foot "radius smooth 90-degree elbow 1 foot 9 inches 8" radius smooth 45-degree elbow 1 foot 8" radius smooth 90-degree elbow 1 foot 7 inches 10" radius smooth 45-degree elbow 9 inches 10" radius smooth 90-degree elbow 1 foot 6 inches For SI 1 inch = 25 4 min, 1 foot= 304 8 mm, 1 degree = 0 0175 rad 50 2018 INTERNATIONAL MECHANICAL CODE® 11 1 Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf dv od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S ( I I.i Agffi,vo ,AOICC Nof th,, ,od,S,o,,,o u ,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS SECTION 505 DOMESTIC COOKING EXHAUST EQUIPMENT 505.1 General. Domestic cooking exhaust equipment shall comply with the requirements of this section 505.2 Domestic cooking exhaust. Where domestic cooking exhaust equipment is provided, it shall comply with the fol- lowing as applicable 1 The fan for overhead range hoods and downdraft exhaust equipment not integral with the cooking appli- ance shall be listed and labeled in accordance with UL 507 2 Overhead range hoods and downdraft exhaust equip- ment with integral fans shall comply with UL 507 3 Domestic cooking appliances with integral downdraft exhaust equipment shall be listed and labeled in accor- dance with UL 858 or ANSI Z21 1 4 Microwave ovens with integral exhaust for installation over the cooking surface shall be listed and labeled in accordance with UL 923 505.3 Exhaust ducts. Domestic cooking exhaust equipment shall discharge to the outdoors through sheet metal ducts con- structed of galvanized steel, stainless steel, aluminum or cop- per Such ducts shall have smooth inner walls, shall be air tight, shall be equipped with a backdraft damper, and shall be independent of all other exhaust systems Installations in Group I-1 and I-2 occupancies shall be in accordance with the International Building Code and Section 904 13 of the Inter- nationalFireCode Exceptions: 1 In other than Groups I-1 and I-2, where installed in accordance with the manufacturer's instructions and where mechanical or natural ventilation is otherwise provided in accordance with Chapter 4, listed and labeled ductless range hoods shall not be required to discharge to the outdoors 2 Ducts for domestic kitchen cooking appliances equipped with downdraft exhaust systems shall be permitted to be constructed of Schedule 40 PVC pipe and fittings provided that the installation com- plies with all of the following 21 The duct shall be installed under a concrete slab poured on grade 22 The underfloor trench in which the duct is installed shall be completely backfilled with sand or gravel 23 The PVC duct shall extend not more than 1 inch (25 mm) above the indoor concrete floor surface 24 The PVC duct shall extend not more than 1 inch (25 mm) above grade outside of the building 25 The PVC ducts shall be solvent cemented 505.4 Makeup air required. Exhaust hood systems capable of exhausting in excess of 400 cfm (0 19 m'/s) shall be pro- vided with makeup air at a rate approximately equal to the exhaust air rate Such makeup air systems shall be equipped with a means of closure and shall be automatically controlled to start and operate sun ultaneously with the exhaust system 505.5 Common exhaust systems for domestic kitchens located in multistory structures. Where a common multi- story duct system is designed and installed to convey exhaust from multiple domestic kitchen exhaust systems, the con- struction of the system shall be in accordance with all of the following 1 The shaft in which the duct is installed shall be con- structed and fire -resistance rated as required by the International Builckng Code 2 Dampers shall be prohibited in the exhaust duct, except as specified in Section 505 3 Penetrations of the shaft and ductwork shall be protected in accor- dance with Section 607 5 5, Exception 2 3 Rigid metal ductwork shall be installed within the shaft to convey the exhaust The ductwork shall be constructed of sheet steel having a minimum thick- ness of 0 0187 inch (0 4712 mm) (No 26 gage) and m accordance with SMACNA Duct Construction Stand- ards 4 The ductwork within the shaft shall be designed and installed without offsets 5 The exhaust fan motor design shall be in accordance with Section 503 2 6 The exhaust fan motor shall be located outside of the airstream 7 The exhaust fan shall run continuously, and shall be connected to a standby power source 8 Exhaust fan operation shall be monitored in an approved location and shall initiate an audible or visual signal when the fan is not in operation 9 Where the exhaust rate for an individual kitchen exceeds 400 cfm (0 19 m'/s) makeup au shall be pro- vided in accordance with Section 505 4 10 A cleanout opening shall be located at the base of the shaft to provide access to the duct to allow for clea- nout and inspection The finished openings shall be not less than 12 inches by 12 inches (305 mm by 305 mm) 11 Screens shall not be installed at the termination 12 The common multistory duct system shall serve only kitchen exhaust and shall be independent of other exhaust systems 505.6 Other than Group R.In other than Group R occupan- cies, where domestic cooktops, ranges, and open -top broilers are used for domestic purposes, domestic cooking exhaust systems shall be provided SECTION 506 COMMERCIAL KITCHEN HOOD VENTILATION SYSTEM DUCTS AND EXHAUST EQUIPMENT 506.1 General. Commercial kitchen hood ventilation ducts and exhaust equipment shall comply with the requirements of 2018 INTERNAT10NAL MECHANICAL CODE® 51 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS this section Commercial kitchen grease ducts shall be 506.3.2.2 Duct -to -hood joints. Duct -to -hood joints designed for the type of cooking appliance and hood served shall be made with continuous internal or external liq- 506.2 Corrosion protection. Ducts exposed to the outside uid-tight welded or brazed joints Such joints shall be atmosphere or subject to a corrosive environment shall be smooth, accessible for inspection, and without grease protected against corrosion in an approved manner traps 506.3 Ducts serving Type I hoods. Type I exhaust ducts shall be independent of all other exhaust systems except as provided in Section 506 3 5 Commercial kitchen duct sys- tems serving Type I hoods shall be designed, constructed and installed in accordance with Sections 50631 through 5063 133 506.3.1 Duct materials. Ducts serving Type I hoods shall be constructed of materials in accordance with Sections 506 3 1 1 and 506 3 1 2 506.3.1.1 Grease duct materials. Grease ducts serving Type I hoods shall be constructed of steel having a min- imum thickness of 0 0575 inch (1 463 mm) (No 16 gage) or stainless steel not less than 0 0450 inch (1 14 mm) (No 18 gage) in thickness Exception: Factory -built commercial kitchen grease ducts listed and labeled in accordance with UL 1978 and installed in accordance with Section 304 1 506.3.1.2 Makeup air ducts. Makeup air ducts con- necting to or within 18 inches (457 mm) of a Type I hood shall be constructed and installed in accordance with Sections 603 1, 603 3, 603 4, 603 9, 603 10 and 603 12 Duct insulation installed within 18 inches (457 mm) of a Type I hood shall be noncombustible or shall be listed for the application 506.3.2 Joints, seams and penetrations of grease ducts. Joints, seams and penetrations of grease ducts shall be made with a continuous liquid -tight weld or braze made on the external surface of the duct system Exceptions: 1 Penetrations shall not be required to be welded or brazed where sealed by devices that are listed for the application 2 Internal welding or brazing shall not be prohib- ited provided that the joint is formed or ground smooth and is provided with ready access for inspection 3 Factory -built commercial kitchen grease ducts listed and labeled in accordance with UL 1978 and installed in accordance with Section 304 1 506.3.2.1 Duct joint types. Duct joints shall be butt joints, welded flange joints with a maximum flange depth of/ inch (12 7 mm) or overlapping duct joints of either the telescoping or bell type Overlapping joints shall be installed to prevent ledges and obstruc- tions from collecting grease or interfering with gravity drainage to the intended collection point The differ- ence between the inside cross -sectional dimensions of overlapping sections of duct shall not exceed '/q inch (6 4 mm) The length of overlap for overlapping duct joints shall not exceed 2 inches (51 mm) Exceptions: This section shall not apply to 1 A vertical duct -to -hood collar connection made in the top plane of the hood in accor- dance with all of the following 1 1 The hood duct opening shall have a 1- inch-deep (25 mm), full perimeter, welded flange turned down into the hood interior at an angle of 90 degrees (1 57 rad) from the plane of the open- ing 1 2 The duct shall have a 1-mch-deep (25 mm) flange made by a 1-inch by 1- inch (25 mm by 25 mm) angle iron welded to the full perimeter of the duct not less than 1 inch (25 mm) above the bottom end of the duct 1 3 A gasket rated for use at not less than 1500°F (816°C) is installed between the duct flange and the top of the hood 1 4 The duct -to -hood joint shall be secured by stud bolts not less than'/q inch (6 4 mm) in diameter welded to the hood with a spacing not greater than 4 inches (102 mm) on center for the full perimeter of the opening The bolts and nuts shall be secured with lock - washers 2 Listed and labeled duct -to -hood collar connec- tions installed in accordance with Section 304 1 506.3.2.3 Duct -to -exhaust fan connections. Duct -to - exhaust fan connections shall be flanged and gasketed at the base of the fan for vertical discharge fans, shall be flanged, gasketed and bolted to the mlet of the fan for side -inlet utility fans, and shall be flanged, gasketed and bolted to the mlet and outlet of the fan for in -line fans Gasket and sealing materials shall be rated for continuous duty at a temperature of not less than 1500°F (816°C) 506.3.2.4 Vibration isolation. A vibration isolation connector for connecting a duct to a fan shall consist of noncombustible packing in a metal sleeve joint of approved design or shall be a coated -fabric flexible duct connector listed and labeled for the application Vibration isolation connectors shall be installed only at the connection of a duct to a fan mlet or outlet 506.3.2.5 Grease duct test. Prior to the use or conceal- ment of any portion of a grease duct system, a leakage test shall be performed Ducts shall be considered to be concealed where installed in shafts or covered by coat- ings or wraps that prevent the ductwork from being visually inspected on all sides The permit holder shall 52 2018 INTERNATIONAL MECHANICAL CODE® 11 1 C'p IEhtOo2.01vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( RR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER EXHAUST SYSTEMS be responsible to provide the necessary equipment and perform the grease duct leakage test A light test shall be performed to determine that all welded and brazed joints are liquid tight A light test shall be performed by passing a lamp having a power rating of not less than 100 watts through the entire section of ductwork to be tested The lamp shall be open so as to emit light equally in all directions perpendicular to the duct walls A test shall be performed for the entire duct system, including the hood -to -duct connection The duct work shall be per- mitted to be tested in sections, provided that every joint is tested For listed factory -built grease ducts, this test shall be limited to ductjomts assembled in the field and shall exclude factory welds 506.3.3 Grease duct supports. Grease duct bracing and supports shall be of noncombustible material securely attached to the structure and designed to carry gravity and seismic loads within the stress limitations of the Interna- tional Building Code Bolts, screws, rivets and other mechanical fasteners shall not penetrate duct walls 506.3.4 Air velocity. Grease duct systems serving a Type I hood shall be designed and installed to provide an air velocity within the duct system of not less than 500 feet per minute (2 5 m/s) Exception: The velocity limitations shall not apply within duct transitions utilized to connect ducts to dif- ferently sized or shaped openings in hoods and fans, provided that such transitions do not exceed 3 feet (914 mm) in length and are designed to prevent the trapping of grease 506.3.5 Separation of grease duct system. A separate grease duct system shall be provided for each Type I hood A separate grease duct system is not required where all of the following conditions are met 1 All interconnected hoods are located within the same story 2 All interconnected hoods are located within the same room or in adjoining rooms 3 Interconnecting ducts do not penetrate assemblies required to be fire -resistance rated 4 The grease duct system does not serve solid -fuel - fired appliances 506.3.6 Grease duct clearances. Where enclosures are not required, grease duct systems and exhaust equipment serving a Type I hood shall have a clearance to combusti- ble construction of not less than 18 inches (457 mm), and shall have a clearance to noncombustible construction and gypsum wallboard attached to noncombustible structures of not less than 3 inches (76 mm) Exceptions: 1 Factory -built commercial kitchen grease ducts listed and labeled in accordance with UL 1978 2 Listed and labeled exhaust equipment installed in accordance with Section 304 1 Where commercial kitchen grease ducts are con- tinuously covered on all sides with a listed and labeled field -applied grease duct enclosure mate- rial, system, product or method of construction specifically evaluated for such purpose in accor- dance with ASTM E2336, the required clearance shall be in accordance with the listing of such material, system, product or method 506.3.7 Prevention of grease accumulation in grease ducts. Duct systems serving a Type I hood shall be con- structed and installed so that grease cannot collect in any portion thereof, and the system shall slope not less than one-fourth unit vertical in 12 units horizontal (2-percent slope) toward the hood or toward a grease reservoir designed and installed in accordance with Section 506 3 7 1 Where horizontal ducts exceed 75 feet (22 860 mm) in length, the slope shall be not less than one unit ver- tical in 12 units horizontal (8 3-percent slope) 506.3.7.1 Grease duct reservoirs. Grease duct reser- voirs shall 1 Be constructed as required for the grease duct they serve 2 Be located on the bottom of the horizontal duct or the bottommost section of the duct riser 3 Extend across the full width of the duct and have a length of not less than 12 inches (305 mm) 4 Have a depth of not less than 1 inch (25 mm) 5 Have a bottom that slopes to a dram 6 Be provided with a cleanout opening constructed in accordance with Section 506 3 8 and installed to provide direct access to the reservoir The cleanout opening shall be located on a side or on top of the duct so as to permit cleaning of the reservoir 7 Be installed in accordance with the manufac- turer's instructions where manufactured devices are utilized 506.3.8 Grease duct cleanouts and openings. Grease duct cleanouts and openings shall comply with all of the following 1 Grease ducts shall not have openings except where required for the operation and maintenance of the system 2 Sections of grease ducts that are inaccessible from the hood or discharge openings shall be provided with cleanout openings spaced not more than 20 feet (6096 mm) apart and not more than 10 feet (3048 mm) from changes in direction greater than 45 degrees (0 79 rad) 3 Cleanouts and openings shall be equipped with tight -fitting doors constructed of steel having a thickness not less than that required for the duct 4 Cleanout doors shall be installed liquid tight 5 Door assemblies including any frames and gaskets shall be approved for the application and shall not have fasteners that penetrate the duct 2018 INTERNAT10NAL MECHANICAL CODE® 53 I I I I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS 6 Gasket and sealing materials shall be rated for not less than 1500°F (816°C) 7 Listed door assemblies shall be installed in accor- dance with the manufacturer's instructions 506.3.8.1 Personnel entry. Where ductwork is large enough to allow entry of personnel, not less than one approved or listed opening having dimensions not less than 22 inches by 20 inches (559 mm by 508 mm) shall be provided in the horizontal sections, and in the top of vertical risers Where such entry is provided, the duct and its supports shall be capable of supporting the addi- tional load, and the cleanouts specified in Section 506 3 8 are not required 506.3.8.2 Cleanouts serving in -line fans. A cleanout shall be provided for both the mlet side and outlet side of an in -line fan except where a duct does not connect to the fan Such cleanouts shall be located within 3 feet (914 mm) of the fan duct connections 506.3.9 Grease duct horizontal cleanouts. Cleanouts serving horizontal sections of grease ducts shall 1 Be spaced not more than 20 feet (6096 mm) apart 2 Be located not more than 10 feet (3048 mm) from changes in direction that are greater than 45 degrees (0 79 rad) 3 Be located on the bottom only where other locations are not available and shall be provided with internal damming of the opening such that grease will flow past the opening without pooling Bottom cleanouts and openings shall be approved for the application and installed liquid -tight 4 Not be closer than 1 inch (25 mm) from the edges of the duct 5 Have opening dimensions of not less than 12 inches by 12 inches (305 mm by 305 mm) Where such dimensions preclude installation, the opening shall be not less than 12 inches (305 mm) on one side and shall be large enough to provide access for cleaning and m aintenance 6 Shall be located at grease reservoirs 506.3.10 Underground grease duct installation. Under- ground grease duct installations shall comply with all of the following 1 Underground grease ducts shall be constructed of steel having a minimum thickness of 0 0575 inch (1 463 mm) (No 16 gage) and shall be coated to provide protection from corrosion or shall be con- structed of stainless steel having a minimum thick- ness of 0 0450 inch (1 140 mm) (No 18 gage) 2 The underground duct system shall be tested and approved in accordance with Section 506 3 2 5 prior to coating or placement in the ground 3 The underground duct system shall be completely encased in concrete with a mimmum thickness of 4 inches (102 mm) 4 Ducts shall slope toward grease reservoirs 5 A grease reservoir with a cleanout to allow cleaning of the reservoir shall be provided at the base of each vertical duct riser 6 Cleanouts shall be provided with access to permit cleaning and inspection of the duct in accordance with Section 506 3 7 Cleanouts in horizontal ducts shall be installed on the topside of the duct 8 Cleanout locations shall be legibly identified at the point of access from the interior space 506.3.11 Grease duct enclosures. A commercial kitchen grease duct serving a Type I hood that penetrates a ceiling, wall, floor or any concealed space shall be enclosed from the point of penetration to the outlet terminal In -line exhaust fans not located outdoors shall be enclosed as required for grease ducts A duct shall penetrate exterior walls only at locations where unprotected openings are permitted by the International Building Code The duct enclosure shall serve a single grease duct and shall not contain other ducts, piping or wiring systems Duct enclo- sures shall be a shaft enclosure in accordance with Section 506 3 11 1, a field -applied enclosure assembly in accor- dance with Section 506 3 11 2 or a factory -built enclosure assembly in accordance with Section 506 3 11 3 Duct enclosures shall have a fire -resistance rating of not less than that of the assembly penetrated and not less than 1 hour Fire dampers and smoke dampers shall not be installed in grease ducts Exception: A duct enclosure shall not be required for a grease duct that penetrates only a nonfire-resistance- rated roof/ceiling assembly 506.3.11.1 Shaft enclosure. Grease ducts constructed in accordance with Section 5063 1 shall be permitted to be enclosed in accordance with the International Building Code requirements for shaft construction Such grease duct systems and exhaust equipment shall have a clearance to combustible construction of not less than 18 inches (457 mm), and shall have a clear- ance to noncombustible construction and gypsum wall- board attached to noncombustible structures of not less than 6 inches (76 mm) Duct enclosures shall be sealed around the duct at the point of penetration and vented to the outside of the building through the use of weather - protected openings 506.3.11.2 Field -applied grease duct enclosure. Grease ducts constructed in accordance with Section 506 3 1 shall be enclosed by a listed and labeled field - applied grease duct enclosure material, systems, prod- uct, or method of construction specifically evaluated for such purpose in accordance with ASTM E2336 The surface of the duct shall be continuously covered on all sides from the point at which the duct originates to the outlet terminal Duct penetrations shall be protected with a through -penetration firestop system tested and listed in accordance with ASTM E814 or UL 1479 and having an "F" and "T" rating equal to the fire -resistance rating of the assembly being penetrated The grease 54 2018 INTERNATIONAL MECHANICAL CODE® rill 1 1 UER CITy IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf dwood mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( I.i A&g,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS duct enclosure and firestop system shall be installed in accordance with the listing and the manufacturer's instructions Partial application of a field -applied grease duct enclosure shall not be installed for the sole purpose of reducing clearances to combustibles at iso- lated sections of grease duct Exposed duct -wrap sys- tems shall be protected where subject to physical damage 506.3.11.3 Factory -built grease duct enclosure assemblies. Factory -built grease ducts incorporating integral enclosure materials shall be listed and labeled for use as grease duct enclosure assemblies specifically evaluated for such purpose in accordance with UL 2221 Duct penetrations shall be protected with a through -penetration firestop system tested and listed in accordance with ASTM E814 or UL 1479 and having an' F" and "T" rating equal to the fire -resistance rating of the assembly being penetrated The grease duct enclosure assembly and firestop system shall be installed in accordance with the listing and the manu- facturer's instructions 506.3.12 Grease duct fire -resistive access opening. Where cleanout openings are located in ducts within a fire - resistance -rated enclosure, access openings shall be pro- vided in the enclosure at each cleanout point Access openings shall be equipped with tight -fitting sliding or hinged doors that are equal in fire -resistive protection to that of the shaft or enclosure An approved sign shall be placed on access opening panels with wording as follows "ACCESS PANEL DO NOT OBSTRUCT " 506.3.13 Exhaust outlets serving Type I hoods. Exhaust outlets for grease ducts serving Type I hoods shall con- form to the requirements of Sections 506313 1 through 5063 133 506.3.13.1 Termination above the roof. Exhaust out- lets that termmate above the roof shall have the dis- charge opening located not less than 40 inches (1016 mm) above the roof surface 506.3.13.2 Termination through an exterior wall. Exhaust outlets shall be permitted to termmate through exterior walls where the smoke, grease, gases, vapors and odors in the discharge from such terminations do not create a public nuisance or a fire hazard Such ter- minations shall not be located where protected open- ings are required by the International Builckng Code Such termmations shall be located in accordance with Section 5063 133 and shall not be located within 3 feet (914 mm) of any opening in the exterior wall 506.3.13.3 Termination location. Exhaust outlets shall be located not less than 10 feet (3048 mm) horizontally from parts of the same or contiguous buildings, adja- cent buildings and adjacent property Imes and shall be located not less than 10 feet (3048 mm) above the adjoining grade level Exhaust outlets shall be located not less than 10 feet (3048 mm) horizontally from or not less than 3 feet (914 mm) above air intake openings into any bwldmg Exception: Exhaust outlets shall termmate not less than 5 feet (1524 mm) horizontally from parts of the same or contiguous building, an adjacent building, adjacent property line and air intake openings into a building where au from the exhaust outlet dis- charges away from such locations 506.4 Ducts serving Type II hoods. Commercial kitchen exhaust systems serving Type II hoods shall comply with Sections 506 4 1 and 506 4 2 506.4.1 Ducts. Ducts and plenums serving Type II hoods shall be constructed of rigid metallic materials Duct con- struction, installation, bracing and supports shall comply with Chapter 6 Ducts subject to positive pressure and ducts conveying moisture -laden or waste -heat -laden air shall be constructed, joined and sealed in an approved in anner 506.4.2 Type II terminations. Exhaust outlets serving Type II hoods shall term mate in accordance with the hood manufacturer's installation instructions and shall comply with all of the following 1 Exhaust outlets shall termmate not less than 3 feet (914 mm) in any direction from openings into the building 2 Outlets shall termmate not less than 10 feet (3048 mm) from property lines or buildings on the same lot 3 Outlets shall termmate not less than 10 feet (3048 mm) above grade 4 Outlets that termmate above a roof shall termmate not less than 30 inches (762 mm) above the roof sur- face 5 Outlets shall terminate not less than 30 inches (762 mm) from exterior vertical walls 6 Outlets shall be protected against local weather con- ditions 7 Outlets shall not be directed onto walkways 8 Outlets shall meet the provisions for exterior wall opening protectwes in accordance with the Interna- tional Building Code. 506.5 Exhaust equipment. Exhaust equipment, including fans and grease reservoirs, shall comply with Sections 506 5 1 through 506 5 6 and shall be of an approved design or shall be listed for the application 506.5.1 Exhaust fans. Exhaust fan housings serving a Type I hood shall be constructed as required for grease ducts in accordance with Section 506 3 1 1 Exception: Fans listed and labeled in accordance with UL 762 506.5.1.1 Fan motor. Exhaust fan motors shall be located outside of the exhaust airstream 506.5.1.2 In -line fan location. Where enclosed duct systems are connected to in -line fans not located out- doors, the fan shall be located in a room or space hav- ing the same fire -resistance rating as the duct enclosure Access shall be provided for servicing and cleaning of 2018 INTERNAT10NAL MECHANICAL CODE® 55 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS fan components Such rooms or spaces shall be venti- lated in accordance with the fan manufacturer's instal- lation instructions 506.5.2 Pollution -control units. The installation of pollu- tion -control units shall be in accordance with the manufac- turer's installation instructions and all of the following 1 Pollution -control units shall be listed and labeled in accordance with UL 1978 2 Fans serving pollution -control units shall be listed and labeled in accordance with UL 762 3 Pollution -control units shall be mounted and secured in accordance with the manufacturer's installation instructions and the International Building Code 4 Pollution -control units located mdoors shall be listed and labeled for such use Where enclosed duct systems, as required by Section 506 3 11, are connected to a pollution control unit, such unit shall be located in a room or space having the same fire -resistance rating as the duct enclosure Access shall be provided for servicing and clean - mg of the unit The space or enclosure shall be ventilated in accordance with the manufacturer's installation instructions 5 A clearance of not less than 18 inches (457 mm) shall be maintained between the pollution -control unit and combustible material 6 Roof -mounted pollution -control units shall be listed for outdoor installation and shall be mounted not less than 18 inches (457 mm) above the roof 7 Exhaust outlets for pollution -control units shall be in accordance with Section 5063 13 8 An airflow differential pressure control shall be provided to monitor the pressure drop across the filter sections of a pollution -control unit When the airflow is reduced below the design velocity, the airflow differential pressure control shall activate a visual alarm located in the area where cooking operations occur 9 Pollution -control units shall be provided with a factory -installed fire suppression system 10 Service space shall be provided in accordance with the manufacturer's instructions for the pollution - control unit and the requirements of Section 306 11 Wash -down drams shall discharge through a grease interceptor and shall be sized for the flow Drains, shall be sealed with a trap or other approved means to prevent air bypass Where a trap is utilized it shall have a seal depth that accounts for the system pressurization and evapo- ration between cleanings 12 Protection from freezing shall be provided for the water supply and fire suppression systems where such systems are subject to freezing 13 Duct connections to pollution -control units shall be in accordance with Section 506 3 2 3 Where water splash or carryover can occur in the transi- tion duct as a result of a washing operation, the transition duct shall slope downward toward the cabinet dram pan for a length not less than 18 inches (457 mm) Ducts shall transition to the full size of the unit's inlet and outlet openings 14 Extra -heavy-duty appliance exhaust systems shall not be connected to pollution -control units except where such units are specifically designed and listed for use with solid fuels 15 Pollution -control units shall be maintained in accordance with the manufacturer's instructions 506.5.3 Exhaust fan discharge. Exhaust fans shall be positioned so that the discharge will not impinge on the roof, other equipment or appliances or parts of the struc- ture A vertical discharge fan shall be manufactured with an approved dram outlet at the lowest point of the housing to permit drainage of grease to an approved grease reser- voir 506.5.4 Exhaust fan mounting. Up -blast fans serving Type I hoods and installed in a vertical or horizontal posi- tion shall be hinged, supplied with a flexible weatherproof electrical cable to permit inspection and cleaning and shall be equipped with a means of restraint to limit the swmg of the fan on its hinge The ductwork shall extend not less than 18 inches (457 mm) above the roof surface 506.5.5 Clearances. Exhaust equipment serving a Type I hood shall have a clearance to combustible construction of not less than 18 inches (457 mm) Exception: Factory -built exhaust equipment installed in accordance with Section 304 1 and listed for a lesser clearance 506.5.6 Termination location. The outlet of exhaust equipment serving Type I hoods shall be in accordance with Section 506 3 13 Exception: The minimum horizontal distance between vertical discharge fans and parapet -type building struc- tures shall be 2 feet (610 mm) provided that such struc- tures are not higher than the top of the fan discharge opening SECTION 507 COMMERCIAL KITCHEN HOODS 507.1 General. Commercial kitchen exhaust hoods shall comply with the requirements of this section Hoods shall be Type I or II and shall be designed to capture and confine cooking vapors and residues A Type I or Type II hood shall be installed at or above appliances in accordance with Sec- tions 507 2 and 507 3 Where any cooking appliance under a single hood requires a Type I hood, a Type I hood shall be installed Where a Type II hood is required, a Type I or Type II hood shall be installed Where a Type I hood is installed, the installation of the entire system, including the hood, ducts, exhaust equipment and makeup air system shall com- ply with the requirements of Sections 506, 507, 508 and 509 Exceptions: 1 Factory -built commercial exhaust hoods that are listed and labeled in accordance with UL 710, and 56 2018 INTERNATIONAL MECHANICAL CODE® CopyaghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) tto S I (MPTITrITITIRR I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS installed in accordance with Section 304 1, shall not be required to comply with Sections 50715, 507 2 3, 507 2 5, 507 2 8, 507 3 1, 507 3 3, 507 4 and 507 5 2 Factory -built commercial cooking recirculating sys- tems that are listed and labeled in accordance with UL 71013, and installed in accordance with Section 304 1, shall not be required to comply with Sections 507 1 5, 507 2 3, 507 2 5, 507 2 8, 507 3 1, 507 3 3, 507 4 and 507 5 Spaces in which such systems are located shall be considered to be kitchens and shall be ventilated in accordance with Table 403 3 1 1 For the purpose of determmmg the floor area required to be ventilated, each individual appliance shall be considered as occupying not less than 100 square feet (9 3 m) 3 Where cooking appliances are equipped with inte- gral down -draft exhaust systems and such appli- ances and exhaust systems are listed and labeled for the application in accordance with NFPA 96, a hood shall not be required at or above them 507.1.1 Operation. Commercial kitchen exhaust hood systems shall operate during the cooking operation The hood exhaust rate shall comply with the listing of the hood or shall comply with Section 507 5 The exhaust fan serv- ing a Type I hood shall have automatic controls that will activate the fan when any appliance that requires such Type I Hood is turned on, or a means of interlock shall be provided that will prevent operation of such appliances when the exhaust fan is not turned on Where one or more temperature or radiant energy sensors are used to activate a Type I hood exhaust fan, the fan shall activate not more than 15 minutes after the first appliance served by that hood has been turned on A method of interlock between an exhaust hood system and appliances equipped with standing pilot burners shall not cause the pilot burners to be extinguished A method of interlock between an exhaust hood system and cooking appliances shall not involve or depend on any component of a fire -extinguish- ing system The net exhaust volumes for hoods shall be permitted to be reduced during part -load cooking conditions, where engineered or listed multispeed or variable speed controls automatically operate the exhaust system to maintain cap- ture and removal of cooking effluents as required by this section Reduced volumes shall not be below that required to maintain capture and removal of effluents from the idle cooking appliances that are operating in a standby mode 507.1.1.1 Multiple hoods utilizing a single exhaust system. Where heat or radiant energy sensors are uti- lized in hood systems consisting of multiple hoods served by a single exhaust system, such sensors shall be provided in each hood Sensors shall be capable of being accessed from the hood outlet or from a cleanout location 507.1.2 Domestic cooking appliances used for commer- cial purposes. Domestic cooking appliances utilized for commercial purposes shall be provided with Type I or Type II hoods as required for the type of appliances and processes in accordance with Sections 507 2 and 507 3 Domestic cooking appliances utilized for domestic cook- I ing shall comply with Section 505 507.1.3 Fuel -burning appliances. Where vented fuel - burning appliances are located in the same room or space as the hood, provisions shall be made to prevent the hood system from interfering with normal operation of the appliance vents 507.1.4 Cleaning. A hood shall be designed to provide for thorough cleaning of the entire hood 507.1.5 Exhaust outlets. Exhaust outlets located within the hood shall be located so as to optimize the capture of particulate matter Each outlet shall serve not more than a 12-foot (3658 mm) section of hood 507.2 Type I hoods. Type I hoods shall be installed where cooking appliances produce grease or smoke as a result of the cooking process Type I hoods shall be installed over medium -duty, heavy-duty and extra -heavy-duty cooling ap- pliances Exception: A Type I hood shall not be required for an electric cooking appliance where an approved testing agency provides documentation that the appliance effluent contains 5 mg/m' or less of grease when tested at an exhaust flow rate of 500 cfin (0 236 m'/s) in accordance with UL 710B 507.2.1 Type I exhaust flow rate label. Type I hoods shall bear a label indicating the minimum exhaust flow rate in cfin per lmear foot (1 55 L/s per lmear meter) of hood that provides for capture and containment of the exhaust effluent for the cooking appliances served by the hood, based on the cooking appliance duty classifications defined in this code 507.2.2 Type I extra -heavy-duty. Type I hoods for use over extra -heavy-duty cooling appliances shall not cover heavy-, medium- or light -duty appliances Such hoods shall discharge to an exhaust system that is independent of other exhaust systems 507.2.3 Type I materials. Type I hoods shall be con- structed of steel having a minimum thickness of 0 0466 inch (1 181 mm) (No 18 gage) or stainless steel not less than 0 0335 inch [0 8525 mm (No 20 MSG)] in thickness 507.2.4 Type I supports. Type I hoods shall be secured in place by noncombustible supports Type I hood supports shall be adequate for the applied load of the hood, the unsupported ductwork, the effluent loading and the possi- ble weight of personnel working in or on the hood 507.2.5 Type I hoods. External hood joints, seams and penetrations for Type I hoods shall be made with a contin- uous external liquid -tight weld or braze to the lowest out- ermost perimeter of the hood Internal hood joints, seams, penetrations, filter support frames and other appendages attached inside the hood shall not be required to be welded or brazed but shall be otherwise sealed to be grease tight Exceptions: 1 Penetrations shall not be required to be welded or brazed where sealed by devices that are listed for the application 2018 INTERNAT10NAL MECHANICAL CODE® 57 I 1 1 1 CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS Internal welding or brazing of seams, Joints and penetrations of the hood shall not be prohibited provided that the joint is formed smooth or ground so as to not trap grease, and is readily cleanable 507.2.6 Clearances for Type I hood. A Type I hood shall be installed with a clearance to combustibles of not less than 18 inches (457 mm) Exceptions: 1 Clearance shall not be required from gypsum wallboard or '/z mch (12 7 mm) or thicker cementitious wallboard attached to noncombusti- ble structures provided that a smooth, cleanable, nonabsorbent and noncombustible material is installed between the hood and the gypsum or cementitious wallboard over an area extending not less than 18 inches (457 mm) in all directions from the hood 2 Type I hoods listed and labeled for clearances less than 18 inches in accordance with UL 710 shall be installed with the clearances specified by such listings 507.2.7 Type I hoods penetrating a ceiling. Type I hoods or portions thereof penetrating a ceiling, wall or furred space shall comply with Section 506 3 11 Field -applied grease duct enclosure systems, as addressed in Section 506 3 11 2, shall not be utilized to satisfy the requirements of this section 507.2.8 Type I grease filters. Type I hoods shall be equipped with grease filters listed and labeled in accordance with UL 1046 Grease filters shall be provided with access for cleaning or replacement The lowest edge of a grease filter located above the cooking surface shall be not less than the height specified in Table 507 2 8 TABLE 507.2.8 MINIMUM DISTANCE BETWEEN THE LOWEST EDGE OF A GREASE FILTER AND THE COOKING SURFACE OR THE HEATING SURFACE TYPE OF COOKING HEIGHTABOVE APPLIANCES COOKING SURFACE (feet) Without exposed flame 05 Exposed flame and burners 2 Exposed charcoal and charbroil type 35 For SI 1 foot— 304 8 min 507.2.8.1 Criteria. Filters shall be of such size, type and arrangement as will permit the required quantity of air to pass through such units at rates not exceeding those for which the filter or unit was designed or approved Filter units shall be installed in frames or holders so as to be readily removable without the use of separate tools, unless designed and installed to be cleaned in place and the system is equipped for such cleaning in place Where filters are designed and required to be cleaned, removable filter units shall be of a size that will allow them to be cleaned in a dishwash- mg machine or pot sink Filter units shall be arranged in place or provided with drip -intercepting devices to pre- vent grease or other condensate from dripping into food or on food preparation surfaces 507.2.8.2 Mounting position of grease filters. Filters shall be installed at an angle of not less than 45 degrees (0 79 rad) from the horizontal and shall be equipped with a drip tray beneath the lower edge of the filters 507.2.9 Grease gutters for Type I hood. Grease gutters shall dram to an approved collection receptacle that is fab- ricated, designed and installed to allow access for clean - mg 507.3 Type II hoods. Type II hoods shall be installed above dishwashers and appliances that produce heat or moisture and do not produce grease or smoke as a result of the cooking process, except where the heat and moisture loads from such appliances are incorporated into the HVAC system design or into the design of a separate removal system Type II hoods shall be installed above all appliances that produce products of combustion and do not produce grease or smoke as a result of the cooking process Spaces containing cooking appliances that do not require Type II hoods shall be provided with exhaust at a rate of 0 70 cfm per square foot (0 00033 m'/s) For the purpose of determining the floor area required to be exhausted, each individual appliance that is not required to be installed under a Type II hood shall be considered as occupy- ing not less than 100 square feet (9 3 m') Such additional square footage shall be provided with exhaust at a rate of 0 70 cfm per square foot [ 00356 m'/(s • m)] 507.3.1 Type II hood materials. Type II hoods shall be constructed of steel having a mmimum thickness of 0 0296 inch (0 7534 mm) (No 22 gage) or stainless steel not less than 0 0220 inch (0 5550 mm) (No 24 gage) in thickness, copper sheets weighing not less than 24 ounces per square foot (7 3 kg/m') or of other approved material and gage 507.3.2 Type H supports. Type II hood supports shall be adequate for the applied load of the hood, the unsupported ductwork, the effluent loading and the possible weight of personnel working in or on the hood 507.3.3 Type II hoods joint, seams and penetrations. Joints, seams and penetrations for Type II hoods shall be constructed as set forth in Chapter 6, shall be sealed on the interior of the hood and shall provide a smooth surface that is readily cleanable and water tight 507.4 Hood size and location. Hoods shall comply with the overhang, setback and height requirements in accordance with Sections 507 4 1 and 507 4 2, based on the type of hood 507.4.1 Canopy size and location. The inside lower edge of canopy -type Type I and II commercial hoods shall over- hang or extend a horizontal distance of not less than 6 inches (152 mm) beyond the edge of the top horizontal surface of the appliance on all open sides The vertical dis- tance between the front lower lip of the hood and such sur- face shall not exceed 4 feet (1219 mm) Exception: The hood shall be permitted to be flush with the outer edge of the cooking surface where the hood is closed to the appliance side by a noncombusti- ble wall or panel 58 2018 INTERNATIONAL MECHANICAL CODE® rill 1 1 Clry'EhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf dwood mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( RR I.i A&g,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,o,,byany ,dputyo,AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢e3 ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS 507.4.2 Noncanopy size and location. Noncanopy-type hoods shall be located not greater than 3 feet (914 mm) above the cooking surface The edge of the hood shall be set back not greater than 1 foot (305 mm) from the edge of the cooking surface 507.5 Capacity of hoods. Commercial food service hoods shall exhaust a mmimum net quantity of au determined in accordance with this section and Sections 507 5 1 through 507 5 5 The net quantity of exhaust air shall be calculated by subtracting any airflow supplied directly to a hood cavity from the total exhaust flow rate of a hood Where any combi- nation of heavy-duty, medium -duty and light -duty cooking appliances are utilized under a single hood, the exhaust rate required by this section for the heaviest duty appliance cov- ered by the hood shall be used for the entire hood 507.5.1 Extra -heavy-duty cooking appliances. The min- imum net airflow for hoods, as determined by Section 507 1, used for extra -heavy-duty cooking appliances shall be determined as follows Type of Hood CFM per linear foot of hood Backshelf/pass-over Not allowed Double island canopy (per side) 550 Eyebrow Not allowed Single island canopy 700 Wall -mounted canopy 550 For SI 1 cfrn per Imear foot= 1 55 L/s per Imear meter 507.5.2 Heavy-duty cooking appliances. The minimum net airflow for hoods, as determined by Section 507 1, used for heavy-duty coolnng appliances shall be deter- mined as follows Type of Hood CFM per linear foot of hood Backshelf/pass-over 400 Double island canopy (per side) 400 Eyebrow Not allowed Single island canopy 600 Wall -mounted canopy 400 For SI 1 dro per Imear foot = 1 55 L/s per Imear meter 507.5.3 Medium -duty cooking appliances. The mini- mum net airflow for hoods, as determined by Section 507 1, used for medium -duty cooking appliances shall be determined as follows Type of Hood CFM per linear foot of hood Backshelf/pass-over 300 Double island canopy (per side) 300 Eyebrow 250 Single island canopy 500 Wall -mounted canopy 300 For SI 1 dro per Imear foot = 1 55 L/s per Imear meter 507.5.4 Light -duty cooking appliances. The minimum net airflow for hoods, as determined by Section 507 1, used for fight -duty cooking appliances and food service preparation shall be determined as follows Type of Hood CFM per linear foot of hood Backshelf/pass-over 250 Double island canopy (per side) 250 Eyebrow 250 Single island canopy 400 Wall -mounted canopy 200 For SI 1 cfrn per linear foot = 1 55 L/s per Imear meter 507.5.5 Dishwashing appliances. The mmimum net airflow for Type II hoods used for dishwashing appliances shall be 100 cfm per linear foot (155 L/s per linear meter) of hood length Exception: Dishwashing appliances and equipment installed in accordance with Section 507 3 507.6 Performance test. A performance test shall be con- ducted upon completion and before final approval of the installation of a ventilation system serving commercial cook- ing appliances The test shall verify the rate of exhaust air- flow required by Section 507 5, makeup airflow required by Section 508 and proper operation as specified in this chapter The permit holder shall furnish the necessary test equipment and devices required to perform the tests 507.6.1 Capture and containment test. The permit holder shall verify capture and containment performance of the exhaust system This field test shall be conducted with all appliances under the hood at operating tempera- tures, with all sources of outdoor air providing makeup air for the hood operating and with all sources of recirculated air providing conditioning for the space in which the hood is located operating Capture and containment shall be ver- ified visually by observing smoke or steam produced by actual or simulated cooking, such as that provided by smoke candles and smoke puffers Smoke bombs shall not be used SECTION 508 COMMERCIAL KITCHEN MAKEUP AIR 508.1 Makeup air. Makeup air shall be supplied during the operation of commercial kitchen exhaust systems that are provided for commercial cooking appliances The amount of makeup air supplied to the building from all sources shall be approximately equal to the amount of exhaust air for all exhaust systems for the building The makeup air shall not reduce the effectiveness of the exhaust system Makeup air shall be provided by gravity or mechanical means or both Mechanical makeup air systems shall be automatically con- trolled to start and operate simultaneously with the exhaust system Makeup air intake opening locations shall comply with Section 401 4 2018 INTERNATIONAL MECHANICAL CODE® 59 I I I I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS 508.1.1 Makeup air temperature. The temperature dif- ferential between makeup air and the air in the conditioned space shall not exceed 10°F (6°C) except where the added heating and cooling loads of the makeup air do not exceed the capacity of the HVAC system 508.1.2 Air balance. Design plans for a facility with a commercial kitchen ventilation system shall include a schedule or diagram indicating the design outdoor air bal- ance The design outdoor au balance shall indicate all exhaust and replacement air for the facility, plus the net exfiltration if applicable The total replacement au airflow rate shall equal the total exhaust airflow rate plus the net exfiltration 508.2 Compensating hoods. Manufacturers of compensating hoods shall provide a label indicating the minimum exhaust flow, the maximum makeup airflow or both that provides capture and containment of the exhaust effluent Exception: Compensating hoods with makeup air sup- plied only from the front face discharge and side face dis- charge openings shall not be required to be labeled with the maximum makeup airflow SECTION 509 FIRE SUPPRESSION SYSTEMS 509.1 Where required. Cooking appliances required by Sec- tion 507 2 to have a Type I hood shall be provided with an approved automatic fire suppression system complying with the International Building Code and the International Fire Code SECTION 510 HAZARDOUS EXHAUST SYSTEMS 510.1 General. This section shall govern the design and con- struction of duct systems for hazardous exhaust and shall determme where such systems are required Hazardous exhaust systems are systems designed to capture and control hazardous emissions generated from product handling or pro- cesses, and convey those emissions to the outdoors Hazard- ous emissions include flammable vapors, gases, fumes, mists or dusts, and volatile or airborne materials posing a health hazard, such as toxic or corrosive materials For the purposes of this section, the health -hazard rating of materials shall be as specified inNFPA 704 For the purposes of the provisions of Section 510, a labo- ratory shall be defined as a facility where the use of chemi- cals is related to testing, analysis, teaching, research or developmental activities Chemicals are used or synthesized on a nonproduction basis, rather than in a manufacturing pro- cess 510.2 Where required. A hazardous exhaust system shall be required wherever operations involving the handling or pro- cessing of hazardous materials, in the absence of such exhaust systems and under normal operating conditions, have the potential to create one of the following conditions 1 A flammable vapor, gas, fume, mist or dust is present in concentrations exceeding 25 percent of the lower flammability limit of the substance for the expected room temperature 2 A vapor, gas, fume, mist or dust with a health -hazard rating of 4 is present in any concentration 3 A vapor, gas, fume, mist or dust with a health -hazard rating of 1, 2 or 3 is present in concentrations exceed - mg 1 percent of the median lethal concentration of the substance for acute inhalation toxicity Exception: Laboratories, as defined in Section 5101, except where the concentrations listed in Item 1 are exceeded or a vapor, gas, fume, mist or dust with a health - hazard rating of 1, 2, 3 or 4 is present in concentrations exceeding 1 percent of the median lethal concentration of the substance for acute inhalation toxicity [F] 510.2.1 Lumber yards and woodworking facilities. Equipment or machinery located inside buildings at lum- ber yards and woodworking facilities that generates or emits combustible dust shall be provided with an approved dust -collection and exhaust system installed in accordance with this section and the International Fire Code Equip- ment and systems that are used to collect, process or con- vey combustible dusts shall be provided with an approved explosion -control system [F] 510.2.2 Combustible fibers. Equipment or machinery within a building that generates or emits combustible fibers shall be provided with an approved dust -collecting and exhaust system Such systems shall comply with this code and the International Fire Code 510.3 Design and operation. The design and operation of the exhaust system shall be such that flammable contaminants are diluted in noncontaminated au to maintain concentrations in the exhaust flow below 25 percent of the contaminant's lower flammability limit 510.4Independent system. Hazardous exhaust systems shall be independent of other types of exhaust systems 510.5 Incompatible materials and common shafts. Incom- patible materials, as defined in the International Fire Code, shall not be exhausted through the same hazardous exhaust system Hazardous exhaust systems shall not share common shafts with other duct systems, except where such systems are hazardous exhaust systems originating in the same fire area Exception: The provisions of this section shall not apply to laboratory exhaust systems where all of the following conditions apply 1 All of the hazardous exhaust ductwork and other laboratory exhaust within both the occupied space and the shafts are under negative pressure while in operation 2 The hazardous exhaust ductwork mamfolded together within the occupied space must originate within the same fire area 3 Hazardous exhaust ductwork originating in different fire areas and mamfolded together in a common shaft shall meet the provisions of Section 717 5 3, Exception 1, Item 1 1 of the International Building Code 4 Each control branch has a flow regulating device 60 2018 INTERNATIONAL MECHANICAL CODE® CITY IEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Dm,(hvdmepf dv odmm).(Qtyof PnmdNmod)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) tto S I (MPTITrITTRR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS 5 Perchloric acid hoods and connected exhaust shall be prohibited from mamfoldmg 6 Radioisotope hoods are equipped with filtration, car- bon beds or both where required by the registered design professional 7 Biological safety cabinets are filtered 8 Each hazardous exhaust duct system shall be served by redundant exhaust fans that comply with either of the following 8 1 The fans shall operate simultaneously in par- allel and each fan shall be individually capa- ble of providing the required exhaust rate 82 Each of the redundant fans is controlled so as to operate when the other fan has failed or is shut down for servicing 510.6 Design. Systems for removal of vapors, gases and smoke shall be designed by the constant velocity or equal friction methods Systems conveying particulate matter shall be designed employing the constant velocity method 510.6.1 Balancing. Systems conveying explosive or radioactive materials shall be prebalanced by duct sizing Other systems shall be balanced by duct sizing with bal- ancing devices, such as dampers Dampers provided to balance airflow shall have securely fixed mmnnum-posi- tion blocking devices to prevent restricting the flow below the required volume or velocity 510.6.2 Emission control. The design of the system shall be such that the emissions are confined to the area in which they are generated by air currents, hoods or enclo- sures and shall be exhausted by a duct system to a safe location or treated by removing contaminants 510.6.3 Hoods required. Hoods or enclosures shall be used where contaminants originate in a limited area of a space The design of the hood or enclosure shall be such that air currents created by the exhaust systems will cap- ture the contaminants and transport them directly to the exhaust duct 510.6.4 Contaminant capture and dilution. The velocity and circulation of au in work areas shall be such that con- tammants are captured by an airstream at the area where the emissions are generated and conveyed into a product - conveying duct system Contaminated air from work areas where hazardous contaminants are generated shall be diluted below the thresholds specified in Section 510 2 with air that does not contain other hazardous contami- nants 510.6.5 Makeup air. Makeup air shall be provided at a rate approximately equal to the rate that air is exhausted by the hazardous exhaust system Makeup air intakes shall be located in accordance with Section 401 4 510.6.6 Clearances. The minimum clearance between hoods and combustible construction shall be the clearance required by the duct system 510.6.7 Ducts. Hazardous exhaust duct systems shall extend directly to the exterior of the building and shall not extend into or through ducts and plenums 510.7 Penetrations. Penetrations of structural elements by a hazardous exhaust system shall conform to Sections 510 7 1 through 510 7 4 Exception: Duct penetrations within Group H-5 occupan- cies as allowed by the International Building Code 510.7.1 Fire dampers and smoke dampers. Fire dampers and smoke dampers are prohibited in hazardous exhaust ducts 510.7.1.1 Shaft penetrations. Hazardous exhaust ducts that penetrate fire -resistance -rated shafts shall comply with Section 714 4 1 or 714 4 12 of the International Building Code 510.7.2 Floors. Hazardous exhaust systems that penetrate a floor/ceiling assembly shall be enclosed in a fire -resis- tance -rated shaft constructed in accordance with the Inter- national Building Code. 510.7.3 Wall assemblies. Hazardous exhaust duct systems that penetrate fire -resistance -rated wall assemblies shall be enclosed in fire -resistance -rated construction from the point of penetration to the outlet ter imal, except where the interior of the duct is equipped with an approved auto- matic fire suppression system Ducts shall be enclosed in accordance with the International Building Code require- ments for shaft construction and such enclosure shall have a minimum fire -resistance rating of not less than the high- est fire -resistance -rated wall assembly penetrated 510.7.4 Fire walls. Ducts shall not penetrate a fire wall 510.8 Suppression required. Ducts shall be protected with an approved automatic fire suppression system installed in accordance with the International Building Code Exceptions: 1 An approved automatic fire suppression system shall not be required in ducts conveying materials, fumes, mists and vapors that are nonflammable and noncombustible under all conditions and at any con- centrations 2 Automatic fire suppression systems shall not be required in metallic and noncombustible, nonmetal- lic exhaust ducts in semiconductor fabrication facili- ties 3 An approved automatic fire suppression system shall not be required in ducts where the largest cross -sectional diameter of the duct is less than 10 inches (254 mm) 4 For laboratories, as defined in Section 510 1, auto- matic fire protection systems shall not be required in laboratory hoods or exhaust systems 510.8.1 Duct cleanout. Ducts conveying combustible dust as part of a dust collection system shall be equipped with cleanouts that are provided with approved access, pre - designed to be disassembled for cleaning, or engineered for automatic cleanouts Where provided, cleanouts shall be located at the base of each vertical duct riser and at inter- vals not exceeding 20 feet (6096 mm) in horizontal sec- tions of duct 2018 INTERNAT10NAL MECHANICAL CODE® 61 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.ia Affiee^®,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS 510.9 Duct construction. Ducts used to convey hazardous exhaust shall be constructed of materials approved for instal- lation in such an exhaust system and shall comply with one of the following 1 Ducts shall be constructed of approved G90 galvanized sheet steel, with a minimum nominal thickness as spec- ified in Table 510 9 2 Ducts used in systems exhausting nonflammable corro- sive fumes or vapors shall be constructed of nonmetal- lic materials that exhibit a flame spread index of 25 or less and a smoke -developed index of 50 or less when tested in accordance with ASTM E84 or UL 723 and that are listed and labeled for the application Where the products being exhausted are detrimental to the duct material, the ducts shall be constructed of alternative materials that are compatible with the exhaust TABLE 510.9 MINIMUM DUCT THICKNESS DIAMETER OF MINIMUM NOMINAL THICKNESS DUCT OR Nonabrasive Nonabrasive/ Abrasive MAXIMUM SIDE DIMENSION materials abrasive materials materials 0-8 inches 0 028 inch 0 034 inch 0 040 inch (No 24 gage) (No 22 gage) (No 20 gage) 9-18 inches 0 034 inch 0 040 inch 0 052 inch (No 22 gage) (No 20 gage) (No 18 gage) 19-30 inches 0 040 inch 0 052 inch 0 064 inch (No 20 gage) (No 18 gage) (No 16 gage) Over 30 inches 0 052 inch 0 064 inch 0 079 inch (No 18 gage) (No 16 gage) (No 14 gage) For SI 1 inch — 25 4 min 510.9.1 Duct joints. Ducts shall be made tight with lap joints having a mnimum lap of 1 inch (25 mm) Joints used in ANSUSMACNA Round Industrial Duct Construc- tion Standards and ANSI/SMACNA Rectangular Indus- trial Duct Construction Standards are also acceptable 510.9.2 Clearance to combustibles. Ducts shall have a clearance to combustibles in accordance with Table 510 9 2 Exhaust gases having temperatures in excess of 600°F (316°C) shall be exhausted to a chimney in accor- dance with Section 511 2 TABLE 510.9.2 CLEARANCE TO COMBUSTIBLES TYPE OF EXHAUST OR TEMPERATURE OF EXHAUST (°F) CLEARANCE TO COMBUSTIBLES (inches) Less than 100 1 100-600 12 Flammable vapors 6 For S1 1 inch — 25 4 min, PC — [CF) - 32]/1 8 510.9.3 Explosion relief. Systems exhausting potentially explosive mixtures shall be protected with an approved explosion relief system or by an approved explosion pre- vention system designed and installed in accordance with NFPA 69 An explosion relief system shall be designed to minimize the structural and mechanical damage resulting from an explosion or deflagration within the exhaust sys- tem An explosion prevention system shall be designed to prevent an explosion or deflagration from occurring 510.10 Supports. Ducts shall be supported at intervals not exceeding 10 feet (3048 mm) Supports shall be constructed of noncombustible material SECTION 511 DUST, STOCK AND REFUSE CONVEYING SYSTEMS 511.1 Dust, stock and refuse conveying systems. Dust, stock and refuse conveying systems shall comply with the provisions of Section 510 and Sections 511 1 1 through 511 2 511.1.1 Collectors and separators. Collectors and sepa- rators involving such systems as centrifugal separators, bag filter systems and similar devices, and associated sup- ports shall be constructed of noncombustible materials and shall be located on the exterior of the bwldmg or structure A collector or separator shall not be located nearer than 10 feet (3048 mm) to combustible construction or to an unprotected wall or floor opening, unless the collector is provided with a metal vent pipe that extends above the highest part of any roof with a distance of 30 feet (9144 mm) Exceptions: 1 Collectors such as "Point of Use" collectors, close extraction weld fume collectors, spray fin- ishing booths, stationary grinding tables, sanding booths, and integrated or machine -mounted col- lectors shall be permitted to be installed indoors provided that the installation is in accordance with the International Fire Code and NFPA 70 2 Collectors in independent exhaust systems han- dling combustible dusts shall be permitted to be installed indoors provided that such collectors are installed in compliance with the International Fire Code and NFPA 70 511.1.2 Discharge pipe. Discharge piping shall conform to the requirements for ducts, including clearances required for high -heat appliances, as contained in this code A delivery pipe from a cyclone collector shall not convey refuse directly into the firebox of a boiler, furnace, dutch oven, refuse burner, incinerator or other appliance 511.1.3 Conveying systems exhaust discharge. An exhaust system shall discharge to the outside of the build- ing either directly by flue or indirectly through the bin or vault into which the system discharges except where the contaminants have been removed Exhaust system dis- charge shall be permitted to be recirculated provided that the solid particulate has been removed at a minimum effi- ciency of 99 9 percent at 10 microns (10 01 mm), vapor concentrations are less than 25 percent of the LFL, and approved equipment is used to monitor the vapor concen- tration 511.1.4 Spark protection. The outlet of an open-air exhaust tenmmal shall be protected with an approved metal or other noncombustible screen to prevent the entry of sparks 62 2018 INTERNATIONAL MECHANICAL CODE® 1 I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hv dmepf dv od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) T--tto S I (firiTER I.i A&g,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,o,,byany ,dputyo,AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS 511.1.5 Explosion relief vents. A safety or explosion relief vent shall be provided on all systems that convey combustible refuse or stock of an explosive nature, in accordance with the requirements of the International Building Code 511.1.5.1 Screens. Where a screen is installed in a safety relief vent, the screen shall be attached so as to permit ready release under the explosion pressure 511.1.5.2 Hoods. The relief vent shall be provided with an approved noncombustible cowl or hood, or with a counterbalanced relief valve or cover arranged to pre- vent the escape of hazardous materials, gases or liquids 511.2 Exhaust outlets. Outlets for exhaust that exceed 600°F (315'C) shall be designed as a chimney in accordance with Table 511 2 SECTION 512 SUBSLAB SOIL EXHAUST SYSTEMS 512.1 General. Where a subslab soil exhaust system is pro- vided, the duct shall conform to the requirements of this sec- tion 512.2 Materials. Subslab soil exhaust system duct material shall be air duct material listed and labeled to the require- ments of UL 181 for Class 0 air ducts, or any of the following piping materials that comply with the International Plumbing Code as building sanitary drainage and vent pipe cast iron, galvanized steel, copper or copper -alloy pipe and tube of a weight not less than type DW V, and plastic piping 512.3 Grade. Exhaust system ducts shall not be trapped and shall have a mimmum slope of one -eighth unit vertical in 12 units horizontal (1-percent slope) 512.4 Termination. Subslab soil exhaust system ducts shall extend through the roof and terminate not less than 6 inches (152 mm) above the roof and not less than 10 feet (3048 mm) from any operable openings or air intake 512.5 Identification. Subslab soil exhaust ducts shall be per- manently identified within each floor level by means of a tag, stencil or other approved marking SECTION 513 SMOKE CONTROL SYSTEMS [F] 513.1 Scope and purpose. This section applies to mechanical and passive smoke control systems that are required by the International Building Code or the Interna- tional Fire Code The purpose of this section is to establish minimum requirements for the design, installation and accep- tance testing of smoke control systems that are intended to provide a tenable environment for the evacuation or reloca- tion of occupants These provisions are not intended for the preservation of contents, the timely restoration of operations, or for assistance in fire suppression or overhaul activities Smoke control systems regulated by this section serve a dif- ferent purpose than the smoke and heat removal provisions found in Section 910 of the International Building Code or the International Fire Code [F] 513.2 General design requirements. Buildings, struc- tures, or parts thereof required by the International Building Code or the International Fire Code to have a smoke control system or systems shall have such systems designed in accor- dance with the applicable requirements of Section 909 of the International Building Code and the generally accepted and well -established principles of engineering relevant to the design The construction documents shall include sufficient information and detail to describe adequately the elements of the design necessary for the proper implementation of the smoke control systems These documents shall be accompa- nied with sufficient information and analysis to demonstrate compliance with these provisions [F] 513.3 Special inspection and test requirements. In addition to the ordinary inspection and test requirements that buildings, structures and parts thereof are required to undergo, smoke control systems subject to the provisions of TABLE 511.2 CONSTRUCTION, CLEARANCE AND TERMINATION REQUIREMENTS FOR SINGLE -WALL METAL CHIMNEYS MINIMUM THICKNESS TERMINATION CLEARANCE CHIMNEYS Above Above any part of Combustibleconstruction Noncombustible SERVING Walls Lining roof building within (feet) (inches) construction (inch) opening (feet) 10 25 50 Interior Exterior Interior ins[. Exterior ins[. ins[. . ins[. High -heat appliances 0127 41/2"laid (Over 2,000°F)' (No 10 MSG) on 41/" bed 20 20 See Note c Low -heat appliances 0 127 3 2 18 6 (1,000°F normal operation) (No 10 MSG) none Up to 18" diameter, 2" Medium -heat appliances 0 127 Up to 18" dia 2'/" Over 18" diameter, 4" (2,000°F maximum)° (No 10 MSG) Over 18" 41/ " 10 10 36 24 On 41/" bed For SI 1 inch = 25 4 min, 1 foot= 304 8 mm, PC= [CF) - 32]/1 8 a Lining shall extend from bottom to top of outlet b Lining shall extend from 24 inches below connector to 24 feet above c Clearance shall be as specified by the design engineer and shall have sufficient clearance from buildings and structures to avoid overheating combustible materials (maximum 160oO 2018 INTERNATIONAL MECHANICAL CODE® 63 I I1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dv od mm).(Qtyof FRmdNmod)O,d,,Nomb,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS Section 909 of the International Building Code shall undergo special inspections and tests sufficient to verify the proper commissioning of the smoke control design in its final installed condition The design submission accompanying the construction documents shall clearly detail procedures and methods to be used and the items subject to such inspections and tests Such commissioning shall be in accordance with generally accepted engineering practice and, where possible, based on published standards for the particular testing involved The special inspections and tests required by this section shall be conducted under the same terns as found in Section 1704 of the Internatonal Builckng Code [F] 513.4 Analysis. A rational analysis supporting the types of smoke control systems to be employed, their methods of operation, the systems supporting them and the methods of construction to be utilized shall accompany the submitted construction documents and shall include, but not be limited to, the items indicated in Sections 513 4 1 through 513 4 7 [F] 513.4.1 Stack effect. The system shall be designed such that the maximum probable normal or reverse stack effects will not adversely interfere with the system's capa- bilities In determining the maximum probable stack effects, altitude, elevation, weather history and interior temperatures shall be used [F] 513.4.2 Temperature effect of fire. Buoyancy and expansion caused by the design fire in accordance with Section 513 9 shall be analyzed The system shall be designed such that these effects do not adversely interfere with its capabilities [F] 513.4.3 Wind effect. The design shall consider the adverse effects of wind Such consideration shall be con- sistent with the wind -loading provisions of the Interna- tional Building Code [F] 513.4.41TVAC systems. The design shall consider the effects of the heating, ventilating and air-conditioning (HVAC) systems on both smoke and fire transport The analysis shall include all permutations of systems' status The design shall consider the effects of fire on the HVAC system s [F] 513.4.5 Climate. The design shall consider the effects of low temperatures on systems, property and occupants Air inlets and exhausts shall be located so as to prevent snow or lee blockage [F] 513.4.6 Duration of operation. All portions of active or engineered smoke control systems shall be capable of continued operation after detection of the fire event for a period of not less than either 20 minutes or 1 5 times the calculated egress time, whichever is greater 513.4.7 Smoke control system interaction. The design shall consider the interaction effects of the operation of multiple smoke control systems for all design scenarios [F] 513.5 Smoke barrier construction. Smoke barriers required for passive smoke control and a smoke control sys- tem using the pressurization method shall comply with Sec- tion 709 of the International Builckng Code The maximum allowable leakage area shall be the aggregate area calculated using the following leakage area ratios 1 Walls A/A, — 0 00100 2 Interior exit stairways and ramps and exit passageways Al/A,, = 0 00035 3 Enclosed exit access stairways and ramps and all other shafts Al/A,, = 0 00150 4 Floors and roofs A/AF = 0 00050 where A = Total leakage area, square feet (m') AF = Unit floor or roof area of barrier, square feet (m') Al,, = Unit wall area of barrier, square feet (m) The leakage area ratios shown do not include openings created by gaps around doors and operable windows The total leakage area of the smoke barrier shall be determined in accordance with Section 513 5 1 and tested in accordance with Section 513 5 2 [F] 513.5.1 Total leakage area. Total leakage area of the barrier is the product of the smoke barrier gross area times the allowable leakage area ratio, plus the area of other openings such as gaps around doors and operable win- dows [F] 513.5.2 Testing of leakage area. Compliance with the maximum total leakage area shall be determined by achieving the mimmum air pressure difference across the barrier with the system in the smoke control mode for mechanical smoke control systems utilizing the pressur- ization method Compliance with the maximum total leak- age area of passive smoke control systems shall be verified through methods such as door fan testing or other meth- ods, as approved by the fire code official [F] 513.5.3 Opening protection. Openings in smoke bar- riers shall be protected by automatic -closing devices actu- ated by the required controls for the mechanical smoke control system Door openings shall be protected by door assemblies complying with the requirements of the Inter- national Building Code for doors in smoke barriers Exceptions: Passive smoke control systems with automatic - closing devices actuated by spot -type smoke detectors listed for releasing service installed in accordance with the International Building Code Fixed openings between smoke zones that are protected utilizing the airflow method In Group I-1, Condition 2, Group I-2 and ambula- tory care facilities, where a pair of opposite - swinging doors are installed across a corridor in accordance with Section 513 5 3 1, the doors shall not be required to be protected in accor- dance with Section 716 of the International Building Code The doors shall be close -fitting within operational tolerances and shall not have a center mullion or undercuts in excess of inch (19 1 mm), louvers or grilles The doors shall have head andjamb stops and astragals or rabbets at meeting edges and, where permitted by the door manufacturer's listing, positive -latching devices are not required In Group I-2 and ambulatory care facilities, where such doors are special-purpose horizontal 64 2018 INTERNATIONAL MECHANICAL CODE® 11 1 CITY IEhtOo2.01vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Dm,(hvdmepf dv odmm).(Qtyof PnmdNmod)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) tto S I ( RR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS sliding, accordion or folding door assemblies installed in accordance with Section 1010 14 3 of the International Building Code and are auto- matic closing by smoke detection in accordance with Section 716 2 6 5 of the Internahonal Build- ing Code 5 Group I-3 6 Openings between smoke zones with clear ceil- ing heights of 14 feet (4267 mm) or greater and bank down capacity of greater than 20 minutes as determined by the design fire size [F] 513.5.3.1 Group I-1 Condition 2; Group I-2 and ambulatory care facilities. In Group I-1 Condition 2, Group I-2 and ambulatory care facilities, where doors are installed across a corridor, the doors shall be auto- matic closing by smoke detection in accordance with Section 716 2 6 5 of the International Building Code and shall have a vision panel with fire -protection -rated glazing materials in fire -protection -rated frames, the area of which shall not exceed that tested [F] 513.5.3.2 Ducts and air transfer openings. Ducts and air transfer openings are required to be protected with a minimum Class II, 250°F (121°C) smoke damper complying with the International Building Code [F] 513.6 Pressurization method. The primary mechanical means of controlling smoke shall be by pressure differences across smoke barriers Maintenance of a tenable environment is not required in the smoke control zone of fire origin [F] 513.6.1 Minimum pressure difference. The pressure difference across a smoke barrier used to separate smoke zones shall be not less than 0 05-inch water gage (12 4 Pa) in fully sprinklered buildings In buildings permitted to be other than fully sprm- klered, the smoke control system shall be designed to achieve pressure differences not less than two times the maximum calculated pressure difference produced by the design fire [F] 513.6.2 Maximum pressure difference. The maxi- mum air pressure difference across a smoke barrier shall be determmed by required door -opening or closing forces The actual force required to open exit doors when the sys- tem is in the smoke control mode shall be in accordance with the International Building Code Opening and clos- ing forces for other doors shall be determined by standard engineering methods for the resolution of forces and reac- tions The calculated force to set a side -hinged, swinging door in motion shall be determmed by F=FdL+K(WADP)12(W-d) (Equation5-2) where A = Door area, square feet (m') d = Distance from door handle to latch edge of door, feet (m) F = Total door opening force, pounds (I) F,= Force required to overcome closing device, pounds (A'). K = Coefficient 5 2 (1 0) W = Door width, feet (m) OP = Design pressure difference, inches (Pa) water gage 513.6.3 Pressurized stairways and elevator hoistways. Where stairways or elevator hoistways are pressurized, such pressurization systems shall comply with Section 513 as smoke control systems, in addition to the requirements of Sections 909 20 of the International Building Code and 909 21 of the International Fire Code [F] 513.7 Airflow design method. Where approved by the code official, smoke migration through openings fixed in a permanently open position, which are located between smoke control zones by the use of the airflow method, shall be per- mitted The design airflows shall be in accordance with this section Airflow shall be directed to limit smoke migration from the fire zone The geometry of openings shall be consid- ered to prevent flow reversal from turbulent effects Smoke control systems using the airflow method shall be designed in accordance with NFPA 92 [F] 513.7.1 Prohibited conditions. This method shall not be employed where either the quantity of air or the veloc- ity of the airflow will adversely affect other portions of the smoke control system, unduly intensify the fire, disrupt plume dynamics or interfere with exiting Airflow toward the fire shall not exceed 200 feet per minute (1 02 m/s) Where the calculated airflow exceeds this limit, the air- flow method shall not be used [F] 513.8 Exhaust method. Where approved by the building official, mechanical smoke control for large enclosed vol- umes, such as in atriums or malls, shall be permitted to utilize the exhaust method Smoke control systems using the exhaust method shall be designed in accordance with NFPA 92 [F] 513.8.1 Exhaust rate. The height of the lowest hori- zontal surface of the accumulating smoke layer shall be maintained not less than 6 feet (1829 mm) above any walking surface that forms a portion of a required egress system within the smoke zone [F] 513.9 Design fire. The design fire shall be based on a rational analysis performed by the registered design profes- sional and approved by the code official The design fire shall be based on the analysis in accordance with Section 513 4 and this section [F] 513.9.1 Factors considered. The engineering analysis shall include the characteristics of the fuel, fuel load, effects included by the fire and whether the fire is likely to be steady or unsteady [F] 513.9.2 Design fire fuel. Detenmmation of the design fire shall include consideration of the type of fuel, fuel spacing and configuration [F] 513.9.3 Heat -release assumptions. The analysis shall make use of the best available data from approved sources and shall not be based on excessively stringent limitations of combustible material [F] 513.9.4 Sprinkler effectiveness assumptions. A doc- umented engineering analysis shall be provided for condi- tions that assume fire growth is halted at the time of sprinkler activation 2018 INTERNAT10NAL MECHANICAL CODE® 65 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.ia Affiee^®,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER EXHAUST SYSTEMS [F] 513.10 Equipment. Equipment such as, but not limited to, fans, ducts, automatic dampers and balance dampers shall be suitable for their intended use, suitable for the probable exposure temperatures that the rational analysis indicates, and as approved by the code official [F] 513.10.1 Exhaust fans. Components of exhaust fans shall be rated and certified by the manufacturer for the probable temperature rise to which the components will be exposed Tlus temperature rise shall be computed by T = (Q,Imc) + (TD where (Equation 5-3) = Specific heat of smoke at smoke -layer temperature, Btu/lb°F (kJ/kg . K) in = Exhaust rate, pounds per second (kg/s) QL = Convective heat output of fire, Btu/s (kW) TG = Ambient temperature, °F (K) T = Smoke temperature, °F (K) Exception: Reduced T, as calculated based on the assurance of adequate dilution air [F] 513.10.2 Ducts. Duct materials and joints shall be capable of withstanding the probable temperatures and pressures to which they are exposed as determmed in accordance with Section 513 10 1 Ducts shall be con- structed and supported in accordance with Chapter 6 Ducts shall be leak tested to 1 5 times the maximum design pressure in accordance with nationally accepted practices Measured leakage shall not exceed 5 percent of design flow Results of such testing shall be a part of the documentation procedure Ducts shall be supported directly from fire -resistance -rated structural elements of the bwldmg by substantial, noncombustible supports Exception: Flexible connections, for the purpose of vibration isolation, that are constructed of approved fire -resistance -rated materials [F] 513.10.3 Equipment, inlets and outlets. Equipment shall be located so as to not expose uninvolved portions of the building to an additional fire hazard Outdoor air inlets shall be located so as to minimize the potential for intro- ducing smoke or flame into the building Exhaust outlets shall be so located as to minimize reintroduction of smoke into the building and to limit exposure of the building or adjacent buildings to an additional fire hazard [F] 513.10.4 Automatic dampers. Automatic dampers, regardless of the purpose for which they are installed within the smoke control system, shall be listed and con- form to the requirements of approved recognized stan- dards [F] 513.10.5 Fans. In addition to other requirements, belt - driven fans shall have 15 times the number of belts required for the design duty with the minimum number of belts being two Fans shall be selected for stable perfor- mance based on normal temperature and, where applica- ble, elevated temperature Calculations and manufacturer's fan curves shall be part of the documentation procedures Fans shall be supported and restrained by noncombustible devices in accordance with the structural design require- ments of the International Building Code Motors driving fans shall not be operating beyond their nameplate horse- power (kilowatts) as determmed from measurement of actual current draw Motors driving fans shall have a mm- imum service factor of 1 15 [F] 513.11 Standby power. The smoke control system shall be supplied with standby power in accordance with Section 2702 of the Internatonal Builchng Code [F] 513.11.1 Equipment room. The standby power source and its transfer switches shall be in a room separate from the normal power transformers and switch gear and ventilated directly to and from the exterior The room shall be enclosed with not less than 1-hour fire -resistance -rated fire barriers constructed in accordance with Section 707 of the International Building Code or horizontal assemblies constructed in accordance with Section 711 of the Interna- tional Building Code, or both [F] 513.11.2 Power sources and power surges. Elements of the smoke management system relying on volatile memories or the like shall be supplied with unmterruptible power sources of sufficient duration to span 15-minute pri- mary power interruption Elements of the smoke manage- ment system susceptible to power surges shall be suitably protected by conditioners, suppressors or other approved means [F] 513.12 Detection and control systems. Fire detection systems providing control input or output signals to mechani- cal smoke control systems or elements thereof shall comply with the requirements of Section 907 of the International Building Code Such systems shall be equipped with a control unit complying with UL 864 and listed as smoke control equipment [F] 513.12.1 Verification. Control systems for mechani- cal smoke control systems shall include provisions for ver- ification Verification shall include positive confirmation of actuation, testing, manual override and the presence of power downstream of all disconnects A preprogrammed weekly test sequence shall report abnormal conditions audibly, visually and by printed report The prepro- grammed weekly test shall operate all devices, equipment and components used for smoke control Exception: Where verification of individual compo- nents tested through the preprogrammed weekly testing sequence will interfere with, and produce unwanted effects to, normal bwldmg operation, such individual components are permitted to be bypassed from the pre- programmed weekly testing, where approved by the bwldmg official and in accordance with both of the fol- lowing 1 Where the operation of components is bypassed from the preprogrammed weekly test, presence of power downstream of all disconnects shall be verified weekly by a listed control unit 2 Testing of all components bypassed from the pre- programmed weekly test shall be in accordance with Section 909 20 6 of the International Fire Code 66 2018 INTERNATIONAL MECHANICAL CODE® 11 1 CITY IEhtOo2.01vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Dm,(hvdmepf dv odmm).(Qtyof PnmdNmod)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L--tto S I (fiTER I.i A&g,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,o,,byany ,dputyo,AxmboemPOoossd9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER EXHAUST SYSTEMS [F] 513.12.2 Wiring. In addition to meeting the require- ments of NFPA 70, all wiring, regardless of voltage, shall be fully enclosed within continuous raceways [F] 513.12.3 Activation. Smoke control systems shall be activated in accordance with the International Building Code or the Intematonal Fire Code [F] 513.12.4 Automatic control. Where complete auto- matic control is required or used, the automatic control sequences shall be initiated from an appropriately zoned automatic sprinkler system complying with Section 90331 1 of the International Fire Code, from manual controls provided with ready access for the fire depart- ment, and any smoke detectors required by engineering analysis [F] 513.13 Control -air tubing. Control -air tubing shall be of sufficient size to meet the required response times Tubing shall be flushed clean and dry prior to final connections Tub - mg shall be adequately supported and protected from dam- age Tubing passing through concrete or masonry shall be sleeved and protected from abrasion and electrolytic action [F] 513.13.1 Materials. Control -air tubing shall be hard - drawn copper, Type L, ACR in accordance with ASTM B42, ASTM B43, ASTM B68, ASTM B88, ASTM B251 and ASTM B280 Fittings shall be wrought copper or cop- per alloy, solder type in accordance with ASME B 16 18 or ASME B16 22 Changes in direction shall be made with appropriate tool bends Copper alloy compression -type fit- tings shall be used at final connection to devices, other joints shall be brazed using a BCuP5 brazing alloy with solidus above 1,100°F (593°C) and liquids below 1,500°F (816°C) Brazing flux shall be used on copper -to -copper alloy joints only Exception: Nonmetallic tubing used within control panels and at the final connection to devices provided that all of the following conditions are met 1 Tubing shall comply with the requirements of Section 602 2 13 2 Tubing and connected device shall be completely enclosed within a galvanized or paint -grade steel enclosure having a minimum thickness of 0 0296 inch (07534 mm) (No 22 gage) Entry to the enclosure shall be by copper tubing with a protec- tive grommet of Neoprene or Teflon or by suit- able brass compression to male barbed adapter 3 Tubing shall be identified by appropriately docu- mented coding 4 Tubing shall be neatly tied and supported within the enclosure Tubing bridging cabinets and doors or movable devices shall be of sufficient length to avoid tension and excessive stress Tub- ing shall be protected against abrasion Tubing connected to devices on doors shall be fastened along hinges [F] 513.13.2 Isolation from other functions. Control tub- ing serving other than smoke control functions shall be isolated by automatic isolation valves or shall be an inde- pendent system [F] 513.13.3 Testing. Control -air tubing shall be tested at three times the operating pressure for not less than 30 min- utes without any noticeable loss in gauge pressure prior to final connection to devices [F] 513.14 Marking and identification. The detection and control systems shall be clearly marked at all junctions, accesses and term mations [F] 513.15 Control diagrams. Identical control diagrams shall be provided and maintained as required by the Interna- tional Fire Code [F] 513.16 Fire fighter's smoke control panel. A fire fighter's smoke control panel for fire department emergency response purposes only shall be provided in accordance with the International Fire Code [F] 513.17 System response time. Smoke control system activation shall comply with the International Fire Code [F] 513.18 Acceptance testing. Devices, equipment, compo- nents and sequences shall be tested in accordance with the International Fire Code [F] 513.19 System acceptance. Acceptance of the smoke control system shall be in accordance with the International Fire Code SECTION 514 ENERGY RECOVERY VENTILATION SYSTEMS 514.1 General. Energy recovery ventilation systems shall be installed in accordance with this section Where required for purposes of energy conservation, energy recovery ventilation systems shall comply with the Intematonal Energy Conser- vation Code Ducted heat recovery ventilators shall be listed and labeled in accordance with UL 1812 Nonducted heat recovery ventilators shall be listed and labeled in accordance with UL 1815 514.2 Prohibited applications. Energy recovery ventilation systems shall not be used in the following systems 1 Hazardous exhaust systems covered in Section 510 2 Dust, stock and refuse systems that convey explosive or flammable vapors, fumes or dust 3 Smoke control systems covered in Section 513 4 Commercial kitchen exhaust systems serving Type I or Type II hoods 5 Clothes dryer exhaust systems covered in Section 504 Exception: The application of ERV equipment that recov- ers sensible heat only utilizing coil -type heat exchangers shall not be limited by this section 514.3 Access. A means of access shall be provided to the heat exchanger and other components of the system as required for service, maintenance, repair or replacement 514.4 Recirculated air. Air conveyed within energy recov- ery systems shall not be considered as recirculated air where the energy recovery ventilation system is constructed to limit cross -leakage between air streams to less than 10 percent of the total airflow design capacity 2018 INTERNAT10NAL MECHANICAL CODE® 67 I I 1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 68 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S ( " I I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 6 DUCT SYSTEMS User note: About this chapter., Chapter 6 addresses ductsystems used in HVAC systems and some exhaustsystems. Some exhaustsystem ducts are addressed in Chapter 5, such as kitchen exhaust ducts and clothes dryer exhaust ducts. This chapter addresses airplenums such as above -ceil- ing and below-fioorplenums. Section 607 covers fire and smoke dampers, consistent with the requirements of the International Building Code®. SECTION 601 GENERAL 601.1 Scope. Duct systems used for the movement of air in air-conditioning, heating, ventilating and exhaust systems shall conform to the provisions of this chapter except as oth- erwise specified in Chapters 5 and 7 Exception: Ducts discharging combustible material directly into any combustion chamber shall conform to the requirements ofNFPA 82 [BE] 601.2 Air movement in egress elements. Corridors shall not serve as supply, return, exhaust, relief or venhlahon air ducts Exceptions: 1 Use of a corridor as a source of makeup air for exhaust systems in rooms that open directly onto such corridors, including toilet rooms, bathrooms, dressing rooms, smoking lounges and janitor clos- ets, shall be permitted, provided that each such cor- ridor is directly supplied with outdoor air at a rate greater than the rate of makeup air taken from the corridor 2 Where located within a dwelling unit, the use of cor- ridors for conveying return air shall not be prohib- ited 3 Where located within tenant spaces of 1,000 square feet (93 m) or less in area, use of corridors for con- veying return air is permitted 4 Incidental air movement from pressurized rooms within health care facilities, provided that the corri- dor is not the primary source of supply or return to the room [BE] 601.2.1 Corridor ceiling. Use of the space between the corridor ceiling and the floor or roof structure above as a return air plenum is permitted for one or more of the fol- lowing conditions 1 The corridor is not required to be of fire -resistance - rated construction 2 The corridor is separated from the plenum by fire - resistance -rated construction 3 The air -handling system serving the corridor is shut down upon activation of the air -handling unit smoke detectors required by this code 4 The air -handling system serving the corridor is shut down upon detection of sprinkler waterflow where the building is equipped throughout with an auto- matic sprinkler system 5 The space between the corridor ceiling and the floor or roof structure above the corridor is used as a com- ponent of an approved engineered smoke control system [BE] 601.3 Exits. Equipment and ductwork for exit enclosure ventilation shall comply with one of the following items 1 Such equipment and ductwork shall be located exterior to the building and shall be directly connected to the exit enclosure by ductwork enclosed in construction as required by the International Building Code for shafts 2 Where such equipment and ductwork is located within the exit enclosure, the intake air shall be taken directly from the outdoors and the exhaust air shall be dis- charged directly to the outdoors, or such air shall be conveyed through ducts enclosed in construction as required by the International Building Code for shafts 3 Where located within the building, such equipment and ductwork shall be separated from the remainder of the building, including other mechanical equipment, with construction as required by the International Building Code for shafts In each case, openings into fire -resistance -rated construc- tion shall be limited to those needed for maintenance and operation and shall be protected by self -closing fire -resis- tance -rated devices in accordance with the International Building Code for enclosure wall opening protectives Exit enclosure ventilation systems shall be independent of other building ventilation systems 601.4 Contamination prevention. Exhaust ducts under posi- tive pressure, chimneys and vents shall not extend into or pass through ducts or plenums Exceptions: 1 Exhaust systems located in ceiling return air ple- nums over spaces that are permitted to have 10 per- cent recirculation in accordance with Section 403 2 1, Item 4 The exhaust duct joints, seams and connections shall comply with Section 603 9 2 This section shall not apply to chimneys and vents that pass through plenums where such venting sys- 2018 INTERNAT10NAL MECHANICAL CODE® 69 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) mtto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DUCTSYSTEMS tems comply with one of the following require - in ents 2 1 The venting system shall be listed for posi- tive pressure applications and shall be sealed in accordance with the vent manu- facturer's instructions 22 The venting system shall be installed such that fittings and joints between sections are not installed in the above -ceiling space 23 The venting system shall be installed in a conduit or enclosure with sealed joints sep- arating the interior of the conduit or enclo- sure from the ceiling space 601.5 Return air openings. Return air openings for heating, ventilation and air-conditioning systems shall comply with all of the following 1 Openings shall not be located less than 10 feet (3048 mm) measured in any direction from an open combus- tion chamber or draft hood of another appliance located in the same room or space 2 Return air shall not be taken from a hazardous or insan- itary location or a refrigeration room as defined in this code 3 The amount of return au taken from any room or space shall be not greater than the flow rate of supply air delivered to such room or space 4 Return and transfer openings shall be sized in accor- dance with the appliance or equipment manufacturer's installation instructions, ACCA Manual D or the design of the registered design professional 5 Return air taken from one dwelling unit shall not be discharged into another dwelling unit 6 Taking return air from a crawl space shall not be accomplished through a direct connection to the return side of a forced air furnace Transfer openings in the crawl space enclosure shall not be prohibited 7 Return air shall not be taken from a closet, bathroom, toilet room, kitchen, garage, boiler room, furnace room or unconditioned attic 8 Return air shall not be taken from indoor swimming pool enclosures and associated deck areas Exceptions: 1 Where the au from such spaces is dehumidified in accordance with Section 403 2 1, Item 2 2 Dedicated HVAC systems serving only such spaces Exceptions: 1 Taking return air from a kitchen is not prohibited where such return air openings serve the kitchen and are located not less than 10 feet (3048 mm) from the cooking appliances 2 Dedicated forced air systems serving only the garage shall not be prohibited from obtaining return air from the garage SECTION 602 PLENUMS 602.1 General. Supply, return, exhaust, relief and ventilation air plenums shall be limited to uninhabited crawl spaces, areas above a ceiling or below the floor, attic spaces, mechan- ical equipment rooms and the framing cavities addressed in Section 602 3 Plenums shall be limited to one fire area Au systems shall be ducted from the boundary of the fire area served directly to the air-handlmg equipment Fuel -fired appliances shall not be installed within a plenum 602.2 Construction. Plenum enclosure construction materi- als that are exposed to the airflow shall comply with the requirements of Section 703 5 of the Intemational Building Code or such materials shall have a flame spread index of not more than 25 and a smoke -developed index of not more than 50 when tested in accordance with ASTM E84 or UL 723 The use of gypsum boards to form plenums shall be lim- ited to systems where the air temperatures do not exceed 125°F (52°C) and the building and mechanical system design conditions are such that the gypsum board surface tempera- ture will be maintained above the airstream dew -point tem- perature Air plenums formed by gypsum boards shall not be incorporated in au -handling systems utilizing evaporative coolers 602.2.1 Materials within plenums. Except as required by Sections 602 2 1 1 through 602 2 1 8, materials within ple- nums shall be noncombustible or shall be listed and labeled as having a flame spread index of not more than 25 and a smoke -developed index of not more than 50 when tested in accordance with ASTM E84 or UL 723 Exceptions: 1 Rigid and flexible ducts and connectors shall conform to Section 603 2 Duct coverings, linings, tape and connectors shall conform to Sections 603 and 604 3 This section shall not apply to materials exposed within plenums in one- and two-family dwell- ings 4 This section shall not apply to smoke detectors 5 Combustible materials fully enclosed within one of the following 5 1 Continuous noncombustible raceways or enclosures 5 2 Approved gypsum board assemblies 5 3 Materials listed and labeled for installa- tion within a plenum and listed for the application 6 Materials in Group H, Division 5 fabrication areas and the areas above and below the fabrica- 70 2018 INTERNATIONAL MECHANICAL CODE® I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S ( 1 I TITTRR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER DUCT SYSTEMS tion area that share a common air recirculation path with the fabrication area 602.2.1.1 Wiring. Combustible electrical wires and cables and optical fiber cables exposed within a plenum shall be listed and labeled as having a peak optical den- sity not greater than 0 50, an average optical density not greater than 015, and a flame spread distance not greater than 5 feet (1524 mm) when tested in accor- dance with NFPA 262, or shall be installed in metal raceways or metal sheathed cable Combustible optical fiber and communication raceways exposed within a plenum shall be listed and labeled as having a peak optical density not greater than 0 5, an average optical density not greater than 0 15, and a flame spread dis- tance not greater than 5 feet (1524 mm) when tested in accordance with UL 2024 Only plenum -rated wires and cables shall be installed in plenum -rated raceways 602.2.1.2 Fire sprinkler piping. Plastic fire sprinkler piping exposed within a plenum shall be used only in wet pipe systems and shall be listed and labeled as hav- ing a peak optical density not greater than 0 50, an average optical density not greater than 0 15, and a flame spread distance not greater than 5 feet (1524 mm) when tested in accordance with UL 1887 602.2.1.3 Pneumatic tubing. Combustible pneumatic tubing exposed within a plenum shall be listed and labeled as having a peak optical density not greater than 0 50, an average optical density not greater than 0 15, and a flame spread distance not greater than 5 feet (1524 mm) when tested in accordance with UL 1820 602.2.1.4 Electrical equipment in plenums. Electrical equipment exposed within a plenum shall comply with Sections 602 2 14 1 and 602 2 1 4 2 602.2.1.4.1 Equipment in metallic enclosures. Electrical equipment with metallic enclosures exposed within a plenum shall be permitted 602.2.1.4.2 Equipment in combustible enclosures. Electrical equipment with combustible enclosures exposed within a plenum shall be listed and labeled for such use in accordance with UL 2043 602.2.1.5 Discrete plumbing and mechanical prod- ucts in plenums. Where discrete plumbing and mechanical products and appurtenances are located in a plenum and have exposed combustible material, they shall be listed and labeled for such use in accordance with UL 2043 602.2.1.6 Foam plastic in plenums as interior finish or interior trim. Foam plastic in plenums used as inte- rior wall or ceiling finish or interior trim shall exhibit a flame spread index of 25 or less and a smoke -devel- oped index of 50 or less when tested in accordance with ASTM E84 or UL 723 at the maximum thickness and density intended for use, and shall be tested in accor- dance with NFPA 286 and meet the acceptance criteria of Section 803 1 2 of the Intemational Building Code As an alternative to testing to NFPA 286, the foam plastic shall be approved based on tests conducted in accordance with Section 2603 9 of the International Building Code Exceptions: 1 Foam plastic in plenums used as interior wall or ceiling finish or interior trim shall exhibit a flame spread index of 75 or less and a smoke - developed index of 450 or less when tested in accordance with ASTM E84 or UL 723 at the maximum thickness and density intended for use, where it is separated from the airflow in the plenum by a thermal barrier complying with Section 2603 4 of the International Building Code 2 Foam plastic in plenums used as interior wall or ceiling finish or interior trim, shall exhibit a flame spread index of 75 or less and a smoke - developed index of 450 or less when tested in accordance with ASTM E84 or UL 723 at the maximum thickness and density intended for use, where it is separated from the airflow in the plenum by corrosion -resistant steel having a base metal thickness of not less than 0 0160 inch (0 4 mm) 3 Foam plastic in plenums used as interior wall or ceiling finish or interior trim, shall exhibit a flame spread index of 75 or less and a smoke - developed index of 450 or less when tested in accordance with ASTM E84 or UL 723 at the maximum thickness and density intended for use, where it is separated from the airflow in the plenum by not less than a 1-inch (25 mm) thickness of masonry or concrete 602.2.1.7 Plastic plumbing piping and tubing. Plastic piping and tubing used in plumbing systems shall be listed and labeled as having a flame spread index not I greater than 25 and a smoke -developed index not greater than 50 when tested in accordance with ASTM E84 or UL 723 Exception: Plastic water distribution piping and tubing listed and labeled in accordance with UL 2846 as having a peak optical density not greater than 0 50, an average optical density not greater than 0 15, and a flame spread distance not greater than 5 feet (1524 mm), and installed in accordance with its listing 602.2.1.8 Pipe and duct insulation within plenums. Pipe and duct insulation contained within plenums, including insulation adhesives, shall have a flame spread index of not more than 25 and a smoke devel- oped index of not more than 50 when tested in accor- dance with ASTM E84 or UL 723, using the specimen preparation and mounting procedures of ASTM E2231 Pipe and duct insulation shall not flame, glow, smolder or smoke when tested in accordance with ASTM C411 at the temperature to wluch they are exposed in service The test temperature shall not fall below 250°F (121°C) Pipe and duct insulation shall be listed and labeled 2018 INTERNAT10NAL MECHANICAL CODE® 71 I 1 1 1 CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DUCTSYSTEMS 602.3 Stud cavity and joist space plenums. Stud wall cavi- ties and the spaces between solid floor joists to be utilized as au plenums shall comply with the following conditions 1 Such cavities or spaces shall not be utilized as a plenum for supply air 2 Such cavities or spaces shall not be part of a required fire -resistance -rated assembly 3 Stud wall cavities shall not convey air from more than one floor level 4 Stud wall cavities andjoist space plenums shall comply with the floor penetration protection requirements of the International Building Code 5 Stud wall cavities and joist space plenums shall be iso- lated from adjacent concealed spaces by approved fire - blocking as required in the International Building Code 6 Stud wall cavities in the outside walls of building enve- lope assemblies shall not be utilized as air plenums [BS] 602.4 Flood hazard. For structures located in flood hazard areas, plenum spaces shall be located above the eleva- tion required by Section 1612 of the International Building Code for utilities and attendant equipment or shall be designed and constructed to prevent water from entering or accumulating within the plenum spaces during floods up to such elevation If the plenum spaces are located below the elevation required by Section 1612 of the International Building Code for utilities and attendant equipment, they shall be capable of resisting hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding up to such elevation SECTION 603 DUCT CONSTRUCTION AND INSTALLATION 603.1 General. An air distribution system shall be designed and installed to supply the required distribution of air The installation of an air distribution system shall not affect the fire protection requirements specified in the International Building Code Ducts shall be constructed, braced, reinforced and installed to provide structural strength and durability 603.2 Duct sizing. Ducts installed within a single dwelling unit shall be sized in accordance with ACCA Manual D, the appliance manufacturer's installation instructions or other approved methods Ducts installed within all other buildings shall be sized in accordance with the ASHRAE Handbook of Fundamentals or other equivalent computation procedure 603.3 Duct classification. Ducts shall be classified based on the maximum operating pressure of the duct at pressures of positive or negative 0 5, 1 0, 2 0, 3 0, 4 0, 6 0 or 10 0 inches (1 inch w c = 248 7 Pa) of water column The pressure classi- fication of ducts shall equal or exceed the design pressure of the air distribution in which the ducts are utilized 603.4 Metallic ducts. Metallic ducts shall be constructed as specified in the SMACNA HPAC Duct Construction Stan- dardsMetal and Flexible Exception: Ducts installed within single dwelling units shall have a mmimum thickness as specified in Table 6034 603.4.1 Minimum fasteners. Round metallic ducts shall be mechanically fastened by means of not less than three sheet metal screws or rivets spaced equally around the joint Exception: Where a duct connection is made that is partially inaccessible, three screws or rivets shall be TABLE 603.4 DUCT CONSTRUCTION MINIMUM SHEET METAL THICKNESS FOR SINGLE DWELLING UNITS' ROUND DUCT DIAMETER (inches) STATIC PRESSURE Yi inch water gauge 1-inch water gauge Thickness (inches) Thickness (inches) Galvanized Aluminum Galvanized Aluminum <12 0013 0018 0013 0018 12tol4 0013 0018 0016 0023 15to17 0016 0023 0019 0027 18 0 016 0 023 0 024 0 034 19 to 20 0 019 0 027 0 024 0 034 RECTANGULAR DUCT DIMENSION (inches) STATIC PRESSURE Yi inch water gauge 1-inch water gauge Thickness (inches) Thickness (inches) Galvanized Aluminum Galvanized Aluminum <8 0013 0018 0013 0018 9 to10 0013 0018 0016 0023 11to12 0016 0023 0019 0027 13to16 0019 0027 0019 0027 17 to 18 0 019 0 027 0 024 0 034 19 to 20 0 024 0 034 0 024 0 034 For SI 1 inch = 25 4 mm, 1-inch water gauge = 249 Pa a Ductwork that exceeds 20 inches by dimension or exceeds a pressure of 1-inch water gauge shall be constructed in accordance with SMACNA FNAC Duct Construction Standards Metal and Flenble 72 2018 INTERNATIONAL MECHANICAL CODE® I Clrylght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,Nomb,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( 1 TTRR I.i Agffi,­,AOICC Nof th,, ,od,S,o,,,o u ,,, od,S,00zbyany ,dputyo, AxmboemPcow.d 9e�gleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOOLVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER DUCT SYSTEMS equally spaced on the exposed portion so as to prevent a hinge effect 603.4.2 Duct lap. Crump joints for round and oval metal ducts shall be lapped not less than 1 inch (25 mm) and the male end of the duct shall extend into the adjoining duct in the direction of airflow 603.5 Nonmetallic ducts. Nonmetallic ducts shall be con- structed with Class 0 or Class 1 duct material and shall com- ply with UL 181 Fibrous duct construction shall conform to the SMACNA Fibrous Glass Duct Construction Standards or NAIMA Fibrous Glass Duct Construction Standards. The air temperature within nonmetallic ducts shall not exceed 250°F (121°C) 603.5.1 Gypsum ducts. The use of gypsum boards to form air shafts (ducts) shall be limited to return air sys- tems where the air temperatures do not exceed 1250F (52°C) and the gypsum board surface temperature is main- tained above the airstream dew -point temperature Air ducts formed by gypsum boards shall not be incorporated in au -handling systems utilizing evaporative coolers 603.5.2 Phenolic ducts. Nonmetallic phenolic ducts shall be constructed and installed in accordance with the SMACNA Phenolic Duct Construction Standards 603.6 Flexible air ducts and flexible air connectors. Flexi- ble air ducts, both metallic and nonmetallic, shall comply with Sections 603 6 1, 603 6 1 1, 603 6 3 and 603 6 4 Flexi- ble air connectors, both metallic and nonmetallic, shall com- ply with Sections 603 6 2 through 603 6 4 603.6.1 Flexible air ducts. Flexible air ducts, both metal- lic and nonmetallic, shall be tested in accordance with UL 181 Such ducts shall be listed and labeled as Class 0 or Class 1 flexible air ducts and shall be installed in accor- dance with Section 304 1 603.6.1.1 Duct length. Flexible air ducts shall not be limited in length 603.6.2 Flexible air connectors. Flexible air connectors, both metallic and nonmetallic, shall be tested in accor- dance with UL 181 Such connectors shall be listed and labeled as Class 0 or Class 1 flexible air connectors and shall be installed in accordance with Section 304 1 603.6.2.1 Connector length. Flexible air connectors shall be limited in length to 14 feet (4267 mm) 603.6.2.2 Connector penetration limitations. Flexible air connectors shall not pass through any wall, floor or ceiling 603.6.3 Air temperature. The design temperature of air to be conveyed in flexible air ducts and flexible air con- nectors shall be less than 250OF (121PC) 603.6.4 Flexible air duct and air connector clearance. Flexible air ducts and air connectors shall be installed with a minimum clearance to an appliance as specified in the appliance manufacturer's installation instructions 603.7 Rigid duct penetrations. Duct system penetrations of walls, floors, ceilings and roofs and air transfer openings in such building components shall be protected as required by Section 607 Ducts in a private garage that penetrate a wall or ceiling that separates a dwelling from a private garage shall be continuous, shall be constructed of sheet steel having a tluckness of not less than 0 0187 inch (0 4712 mm) (No 26 gage) and shall not have openings into the garage Fire and smoke dampers are not required in such ducts passing through the wall or ceiling separating a dwelling from a pri- vate garage except where required by Chapter 7 of the Inter- national Builckng Code 603.8 Underground ducts. Ducts shall be approved for underground installation Metallic ducts not having an approved protective coating shall be completely encased in not less than 2 inches (51 mm) of concrete 603.8.1 Slope. Ducts shall have a minimum slope of inch per foot (10 4 mm/m) to allow drainage to a point provided with access 603.8.2 Sealing. Ducts shall be sealed, secured and tested prior to concrete encasement or direct burial Ducts shall be leak tested as required by Section C403 of the Interna- tional Energy Conservation Code 603.8.3 Plastic ducts and fittings. Plastic ducts shall be constructed of PVC having a minimum pipe stiffness of 8 psi (55 kPa) at 5-percent deflection when tested in accor- dance with ASTM D2412 Plastic duct fittings shall be constructed of either PVC or high -density polyethylene Plastic duct and fittings shall be utilized in underground installations only The maximum design temperature for systems utilizing plastic duct and fittings shall be 150°F (66°C) 603.9 Joints, seams and connections. Longitudinal and transverse joints, seams and connections in metallic and non- metallic ducts shall be constructed as specified in SMACNA HPAC Duct Construction StandardsMetal and Flexible and NAIMA Fibrous Glass Duct Construction Standards Joints, longitudinal and transverse seams and connections in ductwork shall be securely fastened and sealed with welds, gaskets, mastics (adhesives), mastic -plus -embedded -fabric systems, liquid sealants or tapes Tapes and mastics used to seal fibrous glass ductwork shall be listed and labeled in accordance with UL 181A and shall be marked "181 A-P" for pressure -sensitive tape, "181 A-M" for mastic or "181 A-H" for heat -sensitive tape Tapes and mastics used to seal metal- lic and flexible air ducts and flexible air connectors shall comply with UL 181B and shall be marked "181 B-FX" for pressure -sensitive tape or "181 B-M" for mastic Duct con- nections to flanges of air distribution system equipment shall be sealed and mechanically fastened Mechanical fasteners for use with flexible nonmetallic air ducts shall comply with UL 18113 and shall be marked "181 B-C" Closure systems used to seal all ductwork shall be installed in accordance with the manufacturer's instructions Exception: For ducts having a static pressure classifica- tion of less than 2 inches of water column (500 Pa), addi- tional closure systems shall not be required for continuously welded joints and seams and locking -type joints and seams This exception shall not apply to snap- 2018 INTERNAT10NAL MECHANICAL CODE® 73 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)p­tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DUCTSYSTEMS lock and button -lock type joints and seams located outside of conditioned spaces 603.10 Supports. Ducts shall be supported in accordance with SMACNA HPAC Duct Construction StandardsMetal and Flexible. Flexible and other factory -made ducts shall be supported in accordance with the manufacturer's instructions 603.11 Furnace connections. Ducts connecting to a furnace shall have a clearance to combustibles in accordance with the furnace manufacturer's installation instructions 603.12 Condensation. Provisions shall be made to prevent the formation of condensation on the exterior of any duct [BS] 603.13 Flood hazard areas. For structures in flood haz- ard areas, ducts shall be located above the elevation required by Section 1612 of the International Building Code for utili- ties and attendant equipment or shall be designed and con- structed to prevent water from entering or accumulating within the ducts during floods up to such elevation If the ducts are located below the elevation required by Section 1612 of the International Budckng Code for utilities and attendant equipment, the ducts shall be capable of resisting hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding up to such elevation 603.14 Location. Ducts shall not be installed in or within 4 inches (102 mm) of the earth, except where such ducts com- ply with Section 603 8 603.15 Mechanical protection. Ducts installed in locations where they are exposed to mechanical damage by vehicles or from other causes shall be protected by approved barriers 603.16 Weather protection. Ducts including linings, cover- ings and vibration isolation connectors installed on the exte- rior of the building shall be protected against the elements 603.17 Air dispersion systems. Au dispersion systems shall 1 Be installed entirely in exposed locations 2 Be utilized in systems under positive pressure 3 Not pass through or penetrate fire -resistant -rated con- struction 4 Be listed and labeled in compliance with UL 2518 603.18 Registers, grilles and diffusers. Duct registers, grilles and diffusers shall be installed in accordance with the manufacturer's instructions Volume dampers or other means of supply air adjustment shall be provided in the branch ducts or at each individual duct register, grille or diffuser Each vol- ume damper or other means of supply air adjustment used in balancing shall be provided with access 603.18.1 Floor registers. Floor registers shall resist, with- out structural failure, a 200-pound (90 8 kg) concentrated load on a 2-mch-diameter (51 mm) disc applied to the most critical area of the exposed face 603.18.2 Prohibited locations. Diffusers, registers and grilles shall be prohibited in the floor or its upward exten- sion within toilet and bathing rooms required by the Inter- national Building Code to have smooth, hard, nonabsorbent surfaces Exception: Dwelling units SECTION 604 INSULATION 604.1 General. Duct insulation shall conform to the require- ments of Sections 604 2 through 604 13 and the International Energy Conservation Code 604.2 Surface temperature. Ducts that operate at tempera- tures exceeding 120OF (490C) shall have sufficient thermal insulation to limit the exposed surface temperature to 120OF (490C) 604.3 Coverings and linings. Coverings and linings, mclud- mg adhesives where used, shall have a flame spread index not more than 25 and a smoke -developed index not more than 50, when tested in accordance with ASTM E84 or UL 723, using the specimen preparation and mounting procedures of ASTM E2231 Duct coverings and linings shall not flame, glow, smolder or smoke when tested in accordance with ASTM C411 at the temperature to which they are exposed in service The test temperature shall not fall below 250OF (121 OC) Cov- erings and linings shall be listed and labeled 604.4 Foam plastic insulation. Foam plastic used as duct coverings and linings shall conform to the requirements of Section 604 604.5 Appliance insulation. Listed and labeled appliances that are internally insulated shall be considered as conform- ing to the requirements of Section 604 604.6 Penetration of assemblies. Duct coverings shall not penetrate a wall or floor required to have a fire -resistance rat- ing or required to be fireblocked 604.7 Identification. External duct insulation, except spray polyurethane foam, and factory -insulated flexible duct shall be legibly printed or identified at intervals not greater than 36 inches (914 mm) with the name of the manufacturer, the ther- mal resistance R-value at the specified installed thickness and the flame spread and smoke -developed indices of the com- posite materials Duct insulation product R-values shall be based on insulation only, excluding air films, vapor retarders or other duct components, and shall be based on tested C-val- ues at 75°F (24°C) mean temperature at the installed thick- ness, in accordance with recognized industry procedures The installed thickness of duct insulation used to detenmme its R- value shall be detenmmed as follows 1 For duct board, duct liner and factory -made rigid ducts not normally subjected to compression, the nominal insulation thickness shall be used 2 For duct wrap, the installed thickness shall be assumed to be 75 percent (25 percent compression) of nominal thickness 3 For factory -made flexible air ducts, the installed thick- ness shall be detenmmed by dividing the difference between the actual outside diameter and nominal inside diameter by two 4 For spray polyurethane foam, the aged R-value per inch, measured in accordance with recognized industry standards, shall be provided to the customer in writing at the tune of foam application 604.8 Lining installation. Linings shall be interrupted at the area of operation of a fire damper and at not less than 6 inches 74 2018 INTERNATIONAL MECHANICAL CODE® I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S ( 1 I TTRR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER DUCT SYSTEMS (152 mm) upstream of and 6 inches (152 mm) downstream of electric -resistance and fuel -burning heaters in a duct system Metal nosmgs or sleeves shall be installed over exposed duct liner edges that face opposite the direction of awflow 604.9 Thermal continuity. Where a duct liner has been interrupted, a duct covering of equal thermal performance shall be installed 604.10 Service openings. Service openings shall not be con- cealed by duct coverings unless the exact location of the opening is properly identified 604.11 Vapor retarders. Where ducts used for cooling are externally insulated, the insulation shall be covered with a vapor retarder having a maximum permeance of 0 05 perm [2 87 ng/(Pa • s • m)] or aluminum foil having a minimum thickness of 2 mils (0 051 mm) Insulations having a perme- ance of 0 05 perm [2 87 ng/(Pa • s • m)] or less shall not be required to be covered Joints and seams shall be sealed to maintain the continuity of the vapor retarder Exception: A vapor retarder is not required for spray poly- urethane foam insulation having a water vapor permeance of not greater than 3 perms per inch [1722 ng/(s • in • Pa)] at the installed thickness 604.12 Weatherproof barriers. Insulated exterior ducts shall be protected with an approved weatherproof barrier 604.13 Internal insulation. Materials used as internal msula- tion and exposed to the airstream in ducts shall be shown to be durable when tested in accordance with UL 181 Exposed internal insulation that is not impermeable to water shall not be used to line ducts or plenums from the exit of a cooling coil to the downstream end of the dram pan SECTION 605 AIR FILTERS 605.1 General. Heating and air-conditioning systems shall be provided with approved air filters Filters shall be installed such that all return air, outdoor air and makeup air is filtered upstream from any heat exchanger or coil Filters shall be installed in an approved convenient location Liquid adhesive coatings used on filters shall have a flash point not lower than 325°F (163°C) 605.2 Approval. Media -type and electrostatic -type air filters shall be listed and labeled Media -type air filters shall comply with UL 900 High -efficiency particulate air filters shall com- ply with UL 586 Electrostatic -type air filters shall comply with UL 867 Air filters utilized within dwelling units shall be designed for the intended application and shall not be required to be listed and labeled 605.3 Airflow over the filter. Ducts shall be constructed to allow an even distribution of air over the entire filter SECTION 606 SMOKE DETECTION SYSTEMS CONTROL 606.1 Controls required. Air distribution systems shall be equipped with smoke detectors listed and labeled for installa- tion in au distribution systems, as required by this section Duct smoke detectors shall comply with UL 268A Other smoke detectors shall comply with UL 268 606.2 Where required. Smoke detectors shall be installed where indicated in Sections 606 2 1 through 606 2 3 Exception: Smoke detectors shall not be required where air distribution systems are incapable of spreading smoke beyond the enclosing walls, floors and ceilings of the room or space in which the smoke is generated 606.2.1 Return air systems. Smoke detectors shall be installed in return air systems with a design capacity greater than 2,000 cfm (0 9 m'/s), in the return air duct or plenum upstream of any filters, exhaust air connections, outdoor air connections, or decontamination equipment and appliances Exception: Smoke detectors are not required in the return air system where all portions of the building served by the air distribution system are protected by area smoke detectors connected to a fire alarm system in accordance with the International Fire Code The area smoke detection system shall comply with Section 6064 606.2.2 Common supply and return air systems. Where multiple air -handling systems share common supply or return air ducts or plenums with a combined design capac- ity greater than 2,000 cfm (0 9 m'/s), the return air system shall be provided with smoke detectors in accordance with Section 606 2 1 Exception: Individual smoke detectors shall not be required for each fan -powered terminal unit, provided that such units do not have an individual design capac- ity greater than 2,000 cfm (0 9 m'/s) and will be shut down by activation of one of the following 1 Smoke detectors required by Sections 606 2 1 and 606 2 3 2 An approved area smoke detector system located in the return air plenum serving such units 3 An area smoke detector system as prescribed in the exception to Section 606 2 1 In all cases, the smoke detectors shall comply with Sec- tions 606 4 and 606 4 1 606.2.3 Return air risers. Where return air risers serve two or more stories and serve any portion of a return air system having a design capacity greater than 15,000 cfm (7 1 m'/s), smoke detectors shall be installed at each story Such smoke detectors shall be located upstream of the connection between the return air riser and any air ducts or plenums [F] 606.3 Installation. Smoke detectors required by this sec- tion shall be installed in accordance with NFPA 72 The required smoke detectors shall be installed to monitor the entire awflow conveyed by the system including return air and exhaust or relief air Access shall be provided to smoke detectors for inspection and maintenance 2018 INTERNAT10NAL MECHANICAL CODE® 75 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 01jM IOZM0 m. oo PAL (PST) tto ( I.ia Affiee^®,AOICC Nofirth¢,e,od,�,00.mfw,,eod,S,00zbyany,dPartyo,AxmboemPOo[vs3ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DUCTSYSTEMS [F] 606.4 Controls operation. Upon activation, the smoke detectors shall shut down all operational capabilities of the air distribution system in accordance with the listing and label- ing of appliances used in the system Au distribution systems that are part of a smoke control system shall switch to the smoke control mode upon activation of a detector [F] 606.4.1 Supervision. The duct smoke detectors shall be connected to a fire alarm system where a fire alarm sys- tem is required by Section 907 2 of the International Fire Code The actuation of a duct smoke detector shall acti- vate a visible and audible supervisory signal at a con- stantly attended location In facilities that are required to be monitored by a supervising station, duct smoke detec- tors shall report only as a supervisory signal, not as a fire alarm Exceptions: 1 The supervisory signal at a constantly attended location is not required where the duct smoke detector activates the building's alarm -indicating appliances 2 In occupancies not required to be equipped with a fire alarm system, actuation of a smoke detector shall activate a visible and audible signal in an approved location Duct smoke detector trouble conditions shall activate a visible or audible sig- nal in an approved location and shall be identi- fied as air duct detector trouble SECTION 607 DUCT AND TRANSFER OPENINGS [BF] 607.1 General. The provisions of this section shall gov- ern the protection of duct penetrations and air transfer open- ings in assemblies required to be protected [BF] 607.1.1 Ducts between shafts. Ducts transitionmg horizontally between shafts shall not require a shaft enclo- sure provided that the duct penetration into each associ- ated shaft is protected with dampers complying with this section [BF] 607.1.2 Ducts that penetrate fire -resistance -rated assemblies without dampers. Ducts that penetrate fire - resistance -rated walls and are not required by this section to have fire dampers shall comply with the requirements of Sections 714 3 through 714 4 3 of the International Build- ing Code Ducts that penetrate horizontal assemblies not required to be contained within a shaft and not required by this section to have fire dampers shall comply with the requirements of Section 714 5 of the International Build- ing Code [BF] 607.1.2.1 Ducts that penetrate nonfire-resis- tance-rated assemblies. The space around a duct pene- trating a nonfire-resistance-rated floor assembly shall comply with Section 717 6 3 of the International Build- ing Code [BF] 607.2Installation. Fire dampers, smoke dampers, com- bination fire/smoke dampers and ceiling radiation dampers located within au distribution and smoke control systems shall be installed in accordance with the requirements of this section, and the manufacturer's instructions and listing [BF] 607.2.1 Smoke control system. Where the installa- tion of a fire damper will interfere with the operation of a required smoke control system in accordance with Section 909 of the International Building Code, approved altema- tive protection shall be used Where mechanical systems including ducts and dampers used for nomial building ventilation serve as part of the smoke control system, the expected performance of these systems in smoke control mode shall be addressed in the rational analysis required by Section 909 4 of the International Building Code 607.2.2 Hazardous exhaust ducts. Fire dampers for haz- ardous exhaust duct systems shall comply with Section 510 [BF] 607.3 Damper testing, ratings and actuation. Damper testing, ratings and actuation shall be in accordance with Sec- tions 607 3 1 through 607 3 3 5 [BF] 607.3.1 Damper testing. Dampers shall be listed and labeled in accordance with the standards in this sec- tion Fire dampers shall comply with the requirements of UL 555 Only fire dampers labeled for use in dynamic sys- tems shall be installed in heating, ventilating and air-con- ditioning systems designed to operate with fans on during a fire Smoke dampers shall comply with the requirements of UL 555S Combination fire/smoke dampers shall com- ply with the requirements of both UL 555 and UL 555S Ceiling radiation dampers shall comply with the require- ments of UL 555C or shall be tested as part of a fire -resis- tance -rated floor/ceiling or roof/ceiling assembly in accordance with ASTM E119 or UL 263 Only ceiling radiation dampers labeled for use in dynamic systems shall be installed in heating, ventilation and air-conditioning systems designed to operate with fans on during a fire Corridor dampers shall comply with requirements of both UL 555 and UL 555S Corridor dampers shall demonstrate acceptable closure performance when subjected to 150 feet per minute (0 76 mps) velocity across the face of the damper using the UL 555 fire exposure test [BF] 607.3.2 Damper rating. Damper ratings shall be in accordance with Sections 607 3 2 1 through 607 3 2 4 [BF] 607.3.2.1 Fire damper ratings. Fire dampers shall have the minimum rating specified in Table 60732 1 [BF] TABLE 607.3.2.1 FIRE DAMPER RATING MINIMUM DAMPER TYPE OF PENETRATION RATING (hour) Less than 3-hour fire -resistance -rated assemblies 11/2 3-hour or greater fire -resistance -rated assemblies 3 [BF] 607.3.2.2 Smoke damper ratings. Smoke damper leakage ratings shall be Class I or II Elevated temperature ratings shall be not less than 250°F (121°C) [BF] 607.3.2.3 Combination fire/smoke damper rat- ings. Combination fire/smoke dampers shall have the 76 2018 INTERNATIONAL MECHANICAL CODE® 1 I[I Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf dwood mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( I.i Agffi,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢e3 ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER DUCT SYSTEMS minimum rating specified for fire dampers in Table 607 3 2 1 and shall have the minimum rating specified for smoke dampers in Section 607 3 2 2 [BF] 607.3.2.4 Corridor damper ratings. Corridor dampers shall have the following ininnnum ratings 1 One -hour fire -resistance rating 2 Class I or II leakage rating as specified in Section 607322 [BF] 607.3.3 Damper actuation. Damper actuation shall be in accordance with Sections 607 3 3 1 through 607 3 3 5 as applicable [BF] 607.3.3.1 Fire damper actuation device. The fire damper actuation device shall meet one of the fol- lowing requirements 1 The operating temperature shall be approxi- mately 50°F (28°C) above the normal tempera- ture within the duct system, but not less than 160°F (71°C) 2 The operating temperature shall be not more than 350°F (177°C) where located in a smoke control system complying with Section 909 of the Inter- national Building Code. [BF] 607.3.3.2 Smoke damper actuation. The smoke damper shall close upon actuation of a listed smoke detector or detectors installed in accordance with Sec- tion 907 3 of the International Building Code and one of the following methods, as applicable 1 Where a smoke damper is installed within a duct, a smoke detector shall be installed inside the duct or outside the duct with sampling tubes protrud- ing into the duct The detector or tubes within the duct shall be within 5 feet (1524 mm) of the damper Air outlets and inlets shall not be located between the detector or tubes and the damper The detector shall be listed for the air velocity, temperature and humidity anticipated at the point where it is installed Other than in mechanical smoke control systems, dampers shall be closed upon fan shutdown where local smoke detectors require a minimum velocity to operate 2 Where a smoke damper is installed above smoke barrier doors in a smoke barrier, a spot -type detector shall be installed on either side of the smoke barrier door opening The detector shall be listed for releasing service if used for direct inter- face with the damper 3 Where a smoke damper is installed within an unducted opening in a wall, a spot -type detector shall be installed within 5 feet (1524 mm) hori- zontally of the damper The detector shall be listed for releasing service if used for direct inter- face with the damper 4 Where a smoke damper is installed in a corridor wall or ceiling, the damper shall be permitted to be controlled by a smoke detection system installed in the corridor 5 Where a smoke detection system is installed in all areas served by the duct in which the damper will be located, the smoke dampers shall be permitted to be controlled by the smoke detection system [BF] 607.3.3.3 Combination fire/smoke damper actuation. Combination fire/smoke damper actuation shall be in accordance with Sections 607 3 3 1 and 607 3 3 2 Combination fire/smoke dampers installed in smoke control system shaft penetrations shall not be activated by local area smoke detection unless it is sec- ondary to the smoke management system controls [BF] 607.3.3.4 Ceiling radiation damper actuation. The operating temperature of a ceiling radiation damper actuation device shall be 50°F (28°C) above the normal temperature within the duct system, but not less than 160°F (71°C) [BF] 607.3.3.5 Corridor damper actuation. Corridor damper actuation shall be in accordance with Sections 607 3 3 1 and 607 3 3 2 [BF] 607.4 Access and identification. Fire and smoke damp- ers shall be provided with an approved means of access, large enough to permit inspection and maintenance of the damper and its operating parts The access shall not affect the integ- rity of fire -resistance -rated assemblies The access openings shall not reduce the fire -resistance rating of the assembly Access points shall be permanently identified on the exterior by a label having letters not less than 0 5 inch (12 7 mm) in height reading FIRE/SMOKE DAMPER, SMOKE DAMPER or FIRE DAMPER Access doors in ducts shall be tight fitting and suitable for the required duct construction [BF] 607.5 Where required. Fire dampers, smoke dampers, combination fire/smoke dampers, ceiling radiation dampers and corridor dampers shall be provided at the locations pre- scribed in Sections 607 5 1 through 607 5 7 Where an assem- bly is required to have both fire dampers and smoke dampers, combination fire/smoke dampers or a fire damper and smoke damper shall be provided [BF] 607.5.1 Fire walls. Ducts and air transfer openings permitted in fire walls in accordance with Section 706 11 of the International Building Code shall be protected with listed fire dampers installed in accordance with their list- ing [BF] 607.5.1.1 Horizontal exits. A listed smoke damper designed to resist the passage of smoke shall be provided at each point that a duct or air transfer open- ing penetrates afire wall that serves as a horizontal exit [BF] 607.5.2 Fire barriers. Ducts and air transfer open- ings that penetrate fire barriers shall be protected with listed fire dampers installed in accordance with their list- ing Ducts and air transfer openings shall not penetrate enclosures for interior exit stairways and ramps and exit passageways except as permitted by Sections 1023 5 and 1024 6, respectively, of the International Building Code Exception: Fire dampers are not required at penetra- tions of fire barriers where any of the following apply 1 Penetrations are tested in accordance with ASTM E119 or UL 263 as part of the fire -resistance - rated assembly 2018 INTERNAT10NAL MECHANICAL CODE® 77 I I I I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.ia Affiee^®,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DUCTSYSTEMS 2 Ducts are used as part of an approved smoke con- trol system in accordance with Section 513 and where the fire damper would interfere with the operation of the smoke control system 3 Such walls are penetrated by ducted HVAC sys- tems, have a required fire -resistance rating of 1 hour or less, are in areas of other than Group H and are in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903 3 1 1 or 903 3 1 2 of the Interna- tional Building Code For the purposes of this exception, a ducted HVAC system shall be a duct system for the structure's HVAC system Such a duct system shall be constructed of sheet steel not less than 26 gage [0 0217 inch (0 55 mm)] thick- ness and shall be continuous from the air -han- dling appliance or equipment to the air outlet and mlet term mals [BF] 607.5.2.1 Horizontal exits. A listed smoke damper designed to resist the passage of smoke shall be provided at each point that a duct or air transfer open - mg penetrates afire barrier that serves as a horizontal exit [BF] 607.5.3 Fire partitions. Ducts and air transfer open- ings that penetrate fire partitions shall be protected with listed fire dampers installed in accordance with their list- ing Exception: In occupancies other than Group H, fire dampers are not required where any of the following apply 1 Corridor walls in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903 3 1 1 or 903 3 1 2 of the Inter- national Building Code and the duct is protected as a through penetration in accordance with Sec- tion 714 of the International Building Code 2 The partitions are tenant partitions in covered and open mall buildings where the walls are not required by provisions elsewhere in the Interna- tional Building Code to extend to the underside of the floor or roof sheathing, slab or deck above 3 The duct system is constructed of approved mate- rials in accordance with Section 603 and the duct penetrating the wall complies with all of the fol- lowing requirements 3 1 The duct shall not exceed 100 square inches (0 06 m') 32 The duct shall be constructed of steel not less than 0 0217 inch (0 55 mm) in thick- ness 3 3 The duct shall not have openings that communicate the corridor with adjacent spaces or rooms 3 4 The duct shall be installed above a ceil- ing 35 The duct shall not terminate at a wall reg- ister in the fire -resistance -rated wall 36 A minmum 12-inch-long (305 mm) by 0 060-mch-thick (1 52 mm) steel sleeve shall be centered in each duct opening The sleeve shall be secured to both sides of the wall and all four sides of the sleeve with minimum C/z mch by C/z mch by 0 060-mch (38 mm by 38 mm by 1 52 mm) steel retaining angles The retaining angles shall be secured to the sleeve and the wall with No 10 (Iv45) screws The annular space between the steel sleeve and the wall opening shall be filled with rock (mineral) wool batting on all sides Such walls are penetrated by ducted HVAC sys- tems, have a required fire -resistance rating of 1 hour or less, and are in areas of other than Group H and are in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903 3 1 1 or 903 3 1 2 of the Intema- tional Building Code For the purposes of this exception, a ducted HVAC system shall be a duct system for conveying supply, return or exhaust air as part of the structure's HVAC system Such a duct system shall be constructed of sheet steel not less than 26 gage in thickness and shall be continuous from the air-handlmg appliance or equipment to the air outlet and inlet terminals [BF] 607.5.4 Corridors/smoke barriers. A listed smoke damper designed to resist the passage of smoke shall be provided at each point a duct or air transfer opening pene- trates a smoke barrier wall or a corridor enclosure required to have smoke and draft control doors in accordance with the International Building Code A corridor damper shall be provided where corridor ceilings, constructed as required for the corridor walls as permitted in Section 708 4, Exception 3, of the Intema- tional Building Code, are penetrated A ceiling radiation damper shall be provided where the ceiling membrane of a fire -resistance -rated floor/ceilmg or roof/ceiling assembly, constructed as permitted in Section 708 4, Exception 2, of the International Building Code, is penetrated Smoke dampers and smoke damper actuation methods shall comply with Section 607 5 4 1 Exceptions: 1 Smoke dampers are not required in corridor pene- trations where the building is equipped through- out with an approved smoke control system in accordance with Section 513 and smoke dampers are not necessary for the operation and control of the system 2 Smoke dampers are not required in smoke barrier penetrations where the openings in ducts are lim- ited to a single smoke compartment and the ducts are constructed of steel 78 2018 INTERNATIONAL MECHANICAL CODE® 11 1 CITY IEhtOo2.01vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Dm,(hvdmepf dv odmm).(Qtyof PnmdNmod)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM(PST)pu�rvantto S ( I I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER DUCT SYSTEMS 3 Smoke dampers are not required in corridor pene- trations where the duct is constructed of steel not less than 0 019 inch (0 48 mm) in thickness and there are no openings serving the corridor 4 Smoke dampers are not required in smoke barri- ers required by Section 407 5 of the International Building Code for Group I-2, Condition 2 where the HVAC system is fully ducted in accordance with Section 603 and where buildings are equipped throughout with an automatic sprinkler system in accordance with Section 903 3 1 1 of the International Building Code and equipped with quick -response sprinklers in accordance with Section 903 3 2 of the International Build- ing Code [BF] 607.5.4.1 Smoke damper. Smoke dampers shall close as required by Section 607 3 3 2 [BF] 607.5.5 Shaft enclosures. Shaft enclosures that are permitted to be penetrated by ducts and air transfer open- ings shall be protected with listed fire and smoke dampers installed in accordance with their listing Exceptions: 1 Fire dampers are not required at penetrations of shafts where any of the following apply 1 1 Steel exhaust subducts extend not less than 22 inches (559 mm) vertically in exhaust shafts provided that there is a continuous airflow upward to the out- doors 1 2 Penetrations are tested in accordance with ASTM El 19 or UL 263 as part of the fire - resistance -rated assembly 1 3 Ducts are used as part of an approved smoke control system in accordance with Section 909 of the International Building Code, and where the fire damper will interfere with the operation of the smoke control system 1 4 The penetrations are in parking garage exhaust or supply shafts that are separated from other building shafts by not less than 2-hour fire -resistance -rated construction In Group B and R occupancies equipped through- out with an automatic sprinkler system in accor- dance with Section 903 3 1 1 of the International Building Code, smoke dampers are not required at penetrations of shafts where latchen, clothes dryer, bathroom and toilet room exhaust open- ings with steel exhaust subducts, having a mini- mum thickness of 0 0187 inch (0 4712 mm) (No 26 gage), extend not less than 22 inches (559 mm) vertically and the exhaust fan at the upper terminus is powered continuously in accordance with the provisions of Section 90911 of the International Building Code, and maintains air- flow upward to the outdoors 3 Smoke dampers are not required at penetrations of exhaust or supply shafts in parking garages that are separated from other building shafts by not less than 2-hour fire -resistance -rated con- struction 4 Smoke dampers are not required at penetrations of shafts where ducts are used as part of an approved mechanical smoke control system designed in accordance with Section 909 of the International Building Code and where the smoke damper will interfere with the operation of the smoke control system 5 Fire dampers and combination fire/smoke damp- ers are not required in kitchen and clothes dryer exhaust systems where dampers are prohibited by this code [BF] 607.5.5.1 Enclosure at the bottom. Shaft enclo- sures that do not extend to the bottom of the building or structure shall be protected in accordance with Section 713 11 of the International Building Code [BF] 607.5.6 Exterior walls. Ducts and air transfer open- ings in fire -resistance -rated exterior walls required to have protected openings in accordance with Section 705 10 of the International Builckng Code shall be protected with listed fire dampers installed in accordance with their list- ing [BF] 607.5.7 Smoke partitions. A listed smoke damper designed to resist the passage of smoke shall be provided at each point where an air transfer opening penetrates a smoke partition Smoke dampers and smoke damper actu- ation methods shall comply with Section 607 3 3 2 Exception: Where the installation of a smoke damper will interfere with the operation of a required smoke control system in accordance with Section 513, approved alternate protection shall be used [BF] 607.6 Horizontal assemblies. Penetrations by air ducts of a floor, floor/ceiling assembly or the ceiling membrane of a roof/ceiling assembly shall be protected by a shaft enclo- sure that complies with Section 713 and Sections 717 6 1 through 717 6 3 of the International Building Code or shall comply with Sections 607 6 1 through 607 6 3 [BF] 607.6.1 Through penetrations. In occupancies other than Groups I-2 and I-3, a duct constructed of approved materials in accordance with Section 603 that penetrates a fire -resistance -rated floor/ceiling assembly that connects not more than two stories is permitted with- out shaft enclosure protection provided that a listed fire damper is installed at the floor line or the duct is protected in accordance with Section 714 5 of the International Building Code. For air transfer openings, see Item 6, Sec- tion 712 19 of the International Building Code Exception: A duct is permitted to penetrate three floors or less without a fire damper at each floor provided that it meets all of the following requirements 1 The duct shall be contained and located within the cavity of a wall and shall be constructed of 2018 INTERNAT10NAL MECHANICAL CODE® 79 I 1 1 1 CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.ia Affiee^®,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, ARF1,,t dtho[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER DUCTSYSTEMS steel having a minimum thickness of 0 0187 inch (0 4712 mm) (No 26 gage) 2 The duct shall open into only one dwelling unit or sleeping unit and the duct system shall be contin- uous from the unit to the exterior of the building 3 The duct shall not exceed a 4-inch (102 mm) nominal diameter and the total area of such ducts shall not exceed 100 square inches for any 100 square feet (64 516 mm' per 9 3 m') of the floor area 4 The annular space around the duct is protected with materials that prevent the passage of flame and hot gases sufficient to ignite cotton waste when subjected to ASTM El19 or UL 263 time - temperature conditions under a minimum posi- tive pressure differential of 0 01 inch (2 49 Pa) of water at the location of the penetration for the time period equivalent to the fire -resistance rat - mg of the construction penetrated 5 Grille openings located in a ceiling of a fire -resis- tance -rated floor/ceiling or roof/ceiling assembly shall be protected with a listed ceiling radiation damper installed in accordance with Section 607621 [BF] 607.6.2 Membrane penetrations. Ducts and air transfer openings constructed of approved materials, in accordance with Section 603, that penetrate the ceiling membrane of a fire -resistance -rated floor/ceiling or roof/ ceiling assembly shall be protected with one of the follow- ing 1 A shaft enclosure in accordance with Section 713 of the International Building Code 2 A listed ceiling radiation damper installed at the ceiling line where a duct penetrates the ceiling of a fire -resistance -rated floor/ceiling or roof/ceiling assembly Exceptions: 1 A fire -resistance -rated assembly tested in accordance with ASTM E119 or UL 263 showing that ceiling radiation dampers are not required in order to maintain the fire - resistance rating of the assembly 2 Where exhaust duct or outdoor air duct penetrations are protected in accordance with Section 714 5 1 2 of the International Building Code, are located within the cav- ity of a wall and do not pass through another dwelling unit or tenant space 3 Where duct and air transfer openings are protected with a duct outlet penetration sys- tem tested as part of a fire -resistance -rated assembly in accordance with ASTM El19 or UL 263 A listed ceiling radiation damper installed at the ceiling line where a diffuser with no duct attached penetrates the ceiling of a fire -resistance -rated floor/ ceiling or roof/ceiling assembly Exceptions: 1 A fire -resistance -rated assembly tested in accordance with ASTM E119 or UL 263 showing that ceiling radiation dampers are not required in order to maintain the fire - resistance rating of the assembly 2 Where duct and air transfer openings are protected with a duct outlet penetration sys- tem tested as part of a fire -resistance -rated assembly in accordance with ASTM E119 or UL 263 [BF] 607.6.2.1 Ceiling radiation dampers testing and installation. Ceiling radiation dampers shall be tested in accordance with Section 607 3 1 Ceiling radiation dampers shall be installed in accordance with the details listed in the fire -resistance -rated assembly and the manufacturer's installation instructions and the list- mg [BF] 607.6.3 Nonfire-resistance-rated floor assemblies. Duct systems constructed of approved materials in accor- dance with Section 603 that penetrate nonfire-resistance- rated floor assemblies shall be protected by any of the fol- lowing methods 1 A shaft enclosure in accordance with Section 713 of the International Building Code 2 The duct connects not more than two stories, and the annular space around the penetrating duct is pro- tected with an approved noncombustible material that resists the free passage of flame and the prod- ucts of combustion 3 In floor assemblies composed of noncombustible materials, a shaft shall not be required where the duct connects not more than three stories, and the annular space around the penetrating duct is pro- tected with an approved noncombustible material that resists the free passage of flame and the prod- ucts of combustion and a fire damper is installed at each floor line Exception: Fire dampers are not required in ducts within individual residential dwelling units [BF] 607.7 Flexible ducts and air connectors. Flexible ducts and au connectors shall not pass through any fire -resis- tance -rated assembly 80 2018 INTERNATIONAL MECHANICAL CODE® 111 CITY IEhtOo2.01vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Dm,(hvdmepf dv odmm).(Qtyof PnmdNmod)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( RR I.i A&g,vo ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 7 COMBUSTION AIR User note: About this chapter., Chapter 7 defers to the International Fuel Gas Code® for combustion air provisions for gas -fired appliances. This code addresses oil fired and solid -fuel -fired appliances, therefore, Chapter 7 is brief, referring to the manufacturer for solid fuel appliances and NFPA 31 for oilfired appliances. Combustion air must be provided to appliances to prevent poor combustion that can create multiple health and safety hazards. SECTION 701 GENERAL 701.1 Scope. Solid fuel -burning appliances shall be provided with combustion air in accordance with the appliance manu- facturer's installation instructions Otl-fired appliances shall be provided with combustion air in accordance with NFPA 31 The methods of providing combustion air in this chapter do not apply to fireplaces, fireplace stoves and direct -vent appliances The requirements for combustion and dilution air for gas -fired appliances shall be in accordance with the Inter- nahonal Fuel Gas Code 701.2 Dampered openings. Where combustion air openings are provided with volume, smoke or fire dampers, the damp- ers shall be interlocked with the firing cycle of the appliances served, so as to prevent operation of any appliance that draws combustion air from the room or space when any of the dampers are closed Manual dampers shall not be installed in combustion air ducts Ducts not provided with dampers and that pass through rated construction shall be enclosed in a shaft in accordance with the International Building Code 2018 INTERNAT10NAL MECHANICAL CODE® 81 I I I I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) mtto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb,t—thod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 82 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S ( " I I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 8 CHIMNEYS AND VENTS User note: About this chapter., Chapter 8 addresses venting means for fuelfiredappliances other than gas -fired. The International Fuel Gas Code® addresses gas -fired appliances. Chimneys include masonry and factory built vents include Type L and pellet vents. SECTION 801 GENERAL 801.1 Scope. This chapter shall govern the installation, main- tenance, repair and approval of factory -built chimneys, chim- ney liners, vents and connectors Tlus chapter shall govern the utilization of masonry chimneys Gas -fired appliances shall be vented in accordance with the International Fuel Gas Code. 801.2 General. Every fuel -burning appliance shall discharge the products of combustion to a vent, factory -built chimney or masonry chimney, except for appliances vented in accor- dance with Section 804 The chimney or vent shall be designed for the type of appliance being vented Exception: Commercial cooking appliances vented by a Type I hood installed in accordance with Section 507 801.2.1 Oil -fired appliances. Oil -fired appliances shall be vented in accordance with this code and NFPA 31 801.3 Masonry chimneys. Masonry chimneys shall be con- structed in accordance with the International Building Code 801.4 Positive flow. Venting systems shall be designed and constructed so as to develop a positive flow adequate to con- vey all combustion products to the outside atmosphere 801.5 Design. Venting systems shall be designed in accor- dance with this chapter or shall be approved engineered sys- tems 801.6 Minimum size of chimney or vent. Except as other- wise provided for in this chapter, the size of the chimney or vent, serving a single appliance, except engineered systems, shall have a minimum area equal to the area of the appliance connection 801.7 Solid fuel appliance flues. The cross -sectional area of a flue serving a solid -fuel -burning appliance shall be not greater than three times the cross -sectional area of the appli- ance flue collar or flue outlet 801.8 Abandoned inlet openings. Abandoned inlet openings in chimneys and vents shall be closed by an approved method 801.9 Positive pressure. Where an appliance equipped with a forced or induced draft system creates a positive pressure in the venting system, the venting system shall be designed and listed for positive pressure applications 801.10 Connection to fireplace. Connection of appliances to chimney flues serving fireplaces shall be in accordance with Sections 801 10 1 through 801 10 3 801.10.1 Closure and access. A noncombustible seal shall be provided below the point of connection to prevent entry of room air into the flue Means shall be provided for access to the flue for inspection and cleaning 801.10.2 Connection to factory -built fireplace flue. An appliance shall not be connected to a flue serving a fac- tory -built fireplace unless the appliance is specifically listed for such installation The connection shall be made in accordance with the appliance manufacturer's installa- tion instructions 801.10.3 Connection to masonry fireplace flue. A con- nector shall extend from the appliance to the flue serving a masonry fireplace such that the flue gases are exhausted directly into the flue The connector shall be provided with access or shall be removable for inspection and cleaning of both the connector and the flue Listed direct connection devices shall be installed in accordance with their listing 801.11 Multiple solid fuel prohibited. A solid fuel -burning appliance or fireplace shall not connect to a chimney passage- way venting another appliance 801.12 Chimney entrance. Connectors shall connect to a chimney flue at a point not less than 12 inches (305 mm) above the lowest portion of the interior of the chimney flue 801.13 Cleanouts. Masonry chimney flues shall be provided with a cleanout opening having a minimum height of 6 inches (152 mm) The upper edge of the opening shall be located not less than 6 inches (152 mm) below the lowest chimney inlet opening The cleanout shall be provided with a tight -fitting noncombustible cover Exception: Cleanouts shall not be required for chimney flues serving masonry fireplaces, if such flues are pro- vided with access through the fireplace opening 801.14 Connections to exhauster. Appliance connections to a chimney or vent equipped with a power exhauster shall be made on the inlet side of the exhauster Joints and piping on the positive pressure side of the exhauster shall be listed for positive pressure applications as specified by the manufac- turer's installation instructions for the exhauster 801.15 Fuel -fired appliances. Masonry chimneys utilized to vent fuel -fired appliances shall be located, constructed and sized as specified in the manufacturer's installation instruc- tions for the appliances being vented 801.16 Flue lining. Masonry chimneys shall be lmed The lining material shall be compatible with the type of appliance connected, in accordance with the appliance listing and man- ufacturer's installation instructions Listed materials used as 2018 INTERNAT10NAL MECHANICAL CODE® 83 I I 1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 01jM IOZM0 m. oo PAL (PST) mtto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb,t—thod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER CHIMNEYS AND VENTS flue linings shall be installed in accordance with their listings and the manufacturer's instructions 801.16.1 Residential and low -heat appliances (general). Flue lining systems for use with residential -type and low - heat appliances shall be limited to the following 1 Clay flue lining complying with the requirements of ASTM C315 or equivalent Clay flue lining shall be installed in accordance with the International Build- ing Code 2 Listed and labeled clumney lining systems comply- ing with UL 1777 3 Other approved materials that will resist, without cracking, softening or corrosion, flue gases and con- densate at temperatures up to 1,800°F (982°C) 801.17 Space around lining. The space surrounding a flue lining system or other vent installed within a masonry chim- ney shall not be used to vent any other appliance This shall not prevent the installation of a separate flue lining in accor- dance with the manufacturer's installation instructions and this code 801.18 Existing chimneys and vents. Where an appliance is permanently disconnected from an existing chimney or vent, or where an appliance is connected to an existing chimney or vent during the process of a new installation, the chimney or vent shall comply with Sections 801 18 1 through 801 18 4 801.18.1 Size. The chimney or vent shall be resized as nec- essary to control flue gas condensation in the interior of the chimney or vent and to provide the appliance or appli- ances served with the required draft For the venting of oil -fired appliances to masonry chimneys, the resizing shall be in accordance with NFPA 31 801.18.2 Flue passageways. The flue gas passageway shall be free of obstructions and combustible deposits and shall be cleaned if previously used for venting a solid or liquid fuel -burning appliance or fireplace The flue liner, chimney inner wall or vent inner wall shall be continuous and shall be free of cracks, gaps, perforations or other damage or deterioration that would allow the escape of combustion products, including gases, moisture and creo- sote Where an oil -fired appliance is connected to an exist- ing masonry chimney, such chimney flue shall be repaired or relined in accordance with NFPA 31 801.18.3 Cleanout. Masonry chimneys shall be provided with a cleanout opening complying with Section 801 13 801.18.4 Clearances. Chimneys and vents shall have air- space clearance to combustibles in accordance with the International Building Code and the chimney or vent man- ufacturer's installation instructions Exception: Masonry chimneys without the required airspace clearances shall be permitted to be used if lined or relined with a chimney lining system listed for use in chimneys with reduced clearances in accordance with UL 1777 The chimney clearance shall be not less than permitted by the terms of the chimney liner listing and the manufacturer's instructions 801.18.4.1 Fireblocking. Noncombustible fireblocking shall be provided in accordance with the International Building Code 801.19 Multistory prohibited. Common venting systems for appliances located on more than one floor level shall be pro- hibited, except where all of the appliances served by the com- mon vent are located in rooms or spaces that are accessed only from the outdoors The appliance enclosures shall not communicate with the occupiable areas of the building 801.20 Plastic vent joints. Plastic pipe and fittings used to vent appliances shall be installed in accordance with the appliance manufacturer's installation instructions SECTION 802 VENTS 802.1 General. Vent systems shall be listed and labeled Type L vents and pellet vents shall be tested in accordance with UL 641 802.2 Vent application. The application of vents shall be in accordance with Table 802 2 TABLE 802.2 VENTAPPLICATION VENT TYPES APPLIANCE TYPES Oil -burring appliances listed and labeled for Type L oil vents venting with Type L vents, gas appliances listed and labeled for venting with Type B vents Pellet vents Pellet fuel -burring appliances listed and labeled for venting with pellet vents 802.3 Installation. Vent systems shall be sized, installed and termmated in accordance with the vent and appliance manu- facturer's installation instructions 802.4 Vent termination caps required. Type L vents shall termmate with a fisted and labeled cap in accordance with the vent manufacturer's installation instructions 802.5 Type L vent terminations. Type L vents shall termi- nate not less than 2 feet (610 mm) above the highest point of the roof penetration and not less than 2 feet (610 mm) higher than any portion of a building within 10 feet (3048 mm) 802.6 Minimum vent heights. Vents shall terminate not less than 5 feet (1524 mm) in vertical height above the highest connected appliance flue collar Exceptions: 1 Venting systems of direct vent appliances shall be installed in accordance with the appliance and the vent manufacturer's instructions 2 Appliances listed for outdoor installations incorpo- rating integral venting means shall be installed in accordance with their listings and the manufac- turer's installation instructions 3 Pellet vents shall be installed in accordance with the appliance and the vent manufacturer's installation instructions 802.7 Support of vents. All portions of vents shall be ade- quately supported for the design and weight of the materials employed 802.8 Insulation shield. Where vents pass through insulated assemblies, an insulation shield constructed of not less than No 26 gage sheet metal shall be installed to provide clear- 84 2018 INTERNATIONAL MECHANICAL CODE® 1 I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf dwood mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( RR I.i A&g,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢e3 ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHIMNEYS AND VENTS ance between the vent and the insulation material The clear- ance shall be not less than the clearance to combustibles specified by the vent manufacturer's installation instructions Where vents pass through attic space, the shield shall termi- nate not less than 2 inches (51 mm) above the insulation materials and shall be secured in place to prevent displace- ment Insulation shields provided as part of a listed vent sys- tem shall be installed in accordance with the manufacturer's installation instructions 802.9 Door swing. Appliance and egLupment vent termmals shall be located such that doors cannot swing within 12 inches (305 mm) horizontally of the vent termmals Door- stops or closers shall not be installed to obtain this clearance SECTION 803 CONNECTORS 803.1 Connectors required. Connectors shall be used to connect appliances to the vertical chimney or vent, except where the chimney or vent is attached directly to the appli- ance 803.2 Location. Connectors shall be located entirely within the room in which the connecting appliance is located, except as provided for in Section 803 10 4 Where passing through an unheated space, a connector shall not be constructed of single -wall pipe 803.3 Size. The connector shall not be smaller than the size of the flue collar supplied by the manufacturer of the appliance Where the appliance has more than one flue outlet, and in the absence of the manufacturer's specific instructions, the con- nector area shall be not less than the combined area of the flue outlets for which it acts as a common connector 803.4 Branch connections. Branch connections to the vent connector shall be made in accordance with the vent manu- facturer's instructions 803.5 Manual dampers. Manual dampers shall not be installed in connectors except in chimney connectors serving solid fuel -burning appliances 803.6 Automatic dampers. Automatic dampers shall be listed and labeled in accordance with UL 17 for oil -fired heating appliances The dampers shall be installed in accor- dance with the manufacturer's instructions An automatic vent damper device shall not be installed on an existing appli- ance unless the appliance is listed and labeled and the device is installed in accordance with the terms of its listing The name of the installer and date of installation shall be marked on a label affixed to the damper device 803.7 Connectors serving two or more appliances. Where two or more connectors enter a common vent or chimney, the smaller connector shall enter at the highest level consistent with available headroom or clearance to combustible mate- rial 803.8 Vent connector construction. Vent connectors shall be constructed of metal The mmimum thickness of the con- nector shall be 0 0136 inch (0 345 mm) (No 28 gage) for gal- vanized steel, 0 022 inch (0 6 mm) (No 26 B & S gage) for copper, and 0 020 inch (0 5 mm) (No 24 B & S gage) for alu- minum TABLE 803.9(1) MINIMUM CHIMNEY CONNECTOR THICKNESS FOR LOW -HEAT APPLIANCES DIAMETER OF CONNECTOR (inches) MINIMUM NOMINAL THICKNESS (galvanized) (inches) 5 and smaller 0 022 (No 26 gage) Larger than 5 and up to 10 0 028 (No 24 gage) Larger than 10 and up to 16 0 034 (No 22 gage) Larger than 16 0 064 (No 16 gage) For SI 1 inch — 25 4 mm TABLE 803.9(2) MINIMUM CHIMNEY CONNECTOR THICKNESS FOR MEDIUM -AND HIGH -HEAT APPLIANCES AREA EQUIVALENT ROUND MINIMUM THICKNESS (square inches) DIAMETER (inches) (inches) 00575 0-154 0-14 (No 16 gage) 0 075 155-201 15-16 (No 14 gage) 202-254 17-18 00994 (No 12 gage) Greater than 254 Greater than 18 0 1292 (No 10 gage) For SI 1 inch — 25 4 mm, 1 square inch — 645 16 min' 803.9 Chimney connector construction. Chimney connec- tors for low -heat appliances shall be of sheet steel pipe hav- ing resistance to corrosion and heat not less than that of galvanized steel specified in Table 803 9(1) Connectors for medium -heat appliances and high -heat appliances shall be of sheet steel not less than the thickness specified in Table 803 9(2) 803.10 Installation. Connectors shall be installed in accor- dance with Sections 803 10 1 through 803 10 6 803.10.1 Supports and joints. Connectors shall be sup- ported in an approved manner, and joints shall be fastened with sheet metal screws, rivets or other approved means 803.10.2 Length. The maximum horizontal length of a single -wall connector shall be 75 percent of the height of the chimney or vent 803.10.3 Connection. The connector shall extend to the inner face of the chimney or vent lmer, but not beyond A connector entering a masonry chimney shall be cemented to masonry in an approved manner Where thimbles are installed to facilitate removal of the connector from the masonry chimney, the thimble shall be permanently cemented in place with high -temperature cement 803.10.4 Connector pass -through. Chimney connectors shall not pass through any floor or ceiling, nor through a fire -resistance -rated wall assembly Chimney connectors for domestic -type appliances shall not pass through walls or partitions constructed of combustible material to reach a masonry chimney except where one of the following apply 1 The connector is labeled for wall pass -through and is installed in accordance with the manufacturer's instructions 2018 INTERNATIONAL MECHANICAL CODE® 85 I I1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dwood mm).(Qtyof FRmdNmod)O,d,,Nomb,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER CHIMNEYS AND VENTS 2 The connector is put through a device labeled for wall pass -through 3 The connector has a diameter not larger than 10 inches (254 mm) and is installed in accordance with one of the methods in Table 803 10 4 Concealed metal parts of the pass -through system in contact with flue gases shall be of stainless steel or equiva- lent material that resists corrosion, softening or cracking up to 1,800'F (980°C) TABLE 803.10.4 CHIMNEY CONNECTOR SYSTEMS AND CLEARANCES TO COMBUSTIBLE WALL MATERIALS FOR DOMESTIC HEATING APPLIANCES" "• ' A 3 5-inch-truck brick wall shall be framed into the combustible wall An 0 625-inch-truck fire -clay liner System A (ASTM C315 or equivalent)'shall be firmly cemented (12-inch in the center of the brick wall maintaining a 12-inch clearance) clearance to combustibles The clay liner shall run from the outer surface of the bricks to the inner surface of the clumney liner A labeled solid -insulated factory -built clumney section (1-inch insulation) the same inside diameter as the con- nector shall be utilized Sheet steel supports cut to maintain a 9-inch clearance to combustibles shall be System B fastened to the wall surface and to the clumney section (9-inch Fasteners shall not penetrate the clumney flue liner clearance) The clumney length shall be flush with the masonry clumney liner and sealed to the masonry with water - insoluble refractory cement Clumney manufacturers' parts shall be utilized to securely fasten the clumney connector to the clumney section A steel ventilated durable having a mimmum duckness of 0 0236 inch (No 24 gage) having two 1-inch Sur channels shall be installed with a steel clumney con - System C nector Steel supports shall be cut to maintain a 6-inch (6-inch clearance between the durable and combustibles The clearance) clumney connector and steel supports shall have a min- imum thickness of 0 0236 inch (No 24 gage) One side of the support shall be fastened to the wall on all sides Glass -fiber insulation shall fill the 6-inch space between the durable and the supports A labeled solid -insulated factory -built clumney section (1-inch insulation) with a diameter 2 inches larger than the clumney connector shall be installed with a steel clumney connector having a minmum duckness of System D 0 0236 inch (24 gage) Sheet steel supports shall be (2-inch positioned to maintain a 2-inch clearance to combusti- clearance) bles and to hold the clumney connector to ensure that a 1-inch airspace surrounds the clumney connector through the clumney section The steel support shall be fastened to the wall on all sides and the clumney sec- tion shall be fastened to the supports Fasteners shall not penetrate the liner of the clumney section For SI 1 inch = 25 4 mm, 1 0 Btu . m/fl . h .'F = 0 144 W/m' . K a Insulation material that is part of the wall pass -through system shall be noncombustible and shall have a thermal conductivity of 1 0 Btu . m/ft' . h OF or less b All clearances and thicknesses are minimums c Materials utilized to seal penetrations for the connector shall be noncombustible d Connectors for all systems except System B shall extend through the wall pass -through system to the inner face of the flue Inver e ASTM C315 803.10.5 Pitch. Connectors shall rise vertically to the chimney or vent with a mimmum pitch equal to one-fourth unit vertical in 12 units horizontal (2-percent slope) 803.10.6 Clearances. Connectors shall have a minimum clearance to combustibles in accordance with Table 803 10 6 The clearances specified in Table 803 10 6 apply, except where the listing and labeling of an appli- ance specifies a different clearance, in which case the labeled clearance shall apply The clearance to combusti- bles for connectors shall be reduced only in accordance with Section 308 TABLE 803.10.6 CONNECTOR CLEARANCES TO COMBUSTIBLES TYPE OF APPLIANCE MINIMUM CLEARANCE (inches) Domestic -type appliances Clumney and vent connectors Electric and oil incinerators 18 Oil and solid -fuel appliances 18 Oil appliances labeled for venting with Type L vents 9 Commercial, industrial -type appliances Low -heat appliances Clumney connectors Oil and solid -fuel boilers, furnace 18 and water heaters Oil unit heaters 18 Other low -heat industrial appliances 18 Medium -heat appliances Clumney connectors All oil and solid -fuel appliances 36 High -heat appliances (As determined by the Masonry or metal connectors code official) All oil and solid -fuel appliances For SI 1 inch = 25 4 min SECTION 804 DIRECT -VENT, INTEGRAL VENT AND MECHANICAL DRAFT SYSTEMS 804.1 Direct -vent terminations. Vent terminals for chrect- vent appliances shall be installed in accordance with the man- ufacturer's instructions 804.2 Appliances with integral vents. Appliances incorpo- rating integral venting means shall be installed in accordance with their listings and the manufacturer's installation mstruc- tions 804.2.1 Terminal clearances. Appliances designed for natural draft venting and incorporating integral venting means shall be located so that a minimum clearance of 9 inches (229 mm) is maintained between vent termmals and from any openings through which combustion products enter the building Appliances using forced draft venting shall be located so that a minimum clearance of 12 inches (305 mm) is maintained between vent terminals and from 86 2018 INTERNATIONAL MECHANICAL CODE® 1 I CopynEhtOoZ.0I7ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf dv od mm).(Qtyof PRmdNmod)O,d,,Nomb,,x10081vms ocJM 10-0 m. oo PM (PST) Tummtto S I ( RR I.i A&g,­,AOICC Nof th,, ,od,S,o,,,o u ,,, od,S,o,,byany ,dputyo, AxmboemPOow.d 9e�gleuva ody mpyncg andoetwodwgp�okb¢e3 ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER CHIMNEYS AND VENTS any openings through which combustion products enter the building 804.3 Mechanical draft systems. Mechanical draft systems of either forced or induced draft design shall be listed and labeled in accordance with UL 378 and shall comply with Sections 804 3 1 through 804 3 8 804.3.1 Forced draft systems. Forced draft systems and all portions of induced draft systems under positive pres- sure during operation shall be designed and installed so as to be gas tight to prevent leakage of combustion products into a building 804.3.2 Automatic shutoff. Power exhausters serving automatically fired appliances shall be electrically con- nected to each appliance to prevent operation of the appli- ance when the power exhauster is not in operation 804.3.3 Termination. The termination of chimneys or vents equipped with power exhausters shall be located not less than 10 feet (3048 mm) from the lot line or from adja- cent buildings The exhaust shall be directed away from the building 804.3.4 Horizontal terminations. Horizontal temima- tions shall comply with the following requirements 1 Where located adjacent to walkways, the temima- tion of mechanical draft systems shall be not less than 7 feet (2134 mm) above the level of the walk- way 2 Vents shall terminate not less than 3 feet (914 mm) above any forced air inlet located within 10 feet (3048 mm) 3 The vent system shall terminate not less than 4 feet (1219 mm) below, 4 feet (1219 mm) horizontally from or 1 foot (305 mm) above any door, window or gravity air inlet into the bwldmg 4 The vent termination point shall not be located closer than 3 feet (914 mm) to an interior comer formed by two walls perpendicular to each other 5 The vent termination shall not be mounted directly above or within 3 feet (914 mm) horizontally from an oil tank vent or gas meter 6 The bottom of the vent termination shall be located not less than 12 inches (305 mm) above finished grade 804.3.5 Vertical terminations. Vertical terminations shall comply with the following requirements 1 Where located adjacent to walkways, the temima- tion of mechanical draft systems shall be not less than 7 feet (2134 mm) above the level of the walk- way 2 Vents shall terminate not less than 3 feet (914 mm) above any forced air inlet located within 10 feet (3048 mm) horizontally 3 Where the vent termination is located below an adja- cent roof structure, the termination point shall be located not less than 3 feet (914 mm) from such structure 4 The vent shall terminate not less than 4 feet (1219 mm) below, 4 feet (1219 mm) horizontally from or 1 foot (305 mm) above any door, window or gravity air inlet for the building 5 A vent cap shall be installed to prevent ram from entering the vent system 6 The vent termination shall be located not less than 3 feet (914 mm) horizontally from any portion of the roof structure 804.3.6 Exhauster connections. An appliance vented by natural draft shall not be connected into a vent, chimney or vent connector on the discharge side of a mechanical flue exhauster 804.3.7 Exhauster sizing. Mechanical flue exhausters and the vent system served shall be sized and installed in accordance with the manufacturer's installation instruc- tions 804.3.8 Mechanical draft systems for manually fired appliances and fireplaces. A mechanical draft system shall be permitted to be used with manually fired appli- ances and fireplaces where such system complies with all of the following requirements 1 The mechanical draft device shall be listed and labeled in accordance with UL 378, and shall be installed in accordance with the manufacturer's instructions 2 A device shall be installed that produces visible and audible warning upon failure of the mechanical draft device or loss of electrical power, at any time that the mechanical draft device is turned on This device shall be equipped with a battery backup if it receives power from the building wiring 3 A smoke detector shall be installed in the room with the appliance or fireplace This device shall be equipped with a battery backup if it receives power from the building wiring SECTION 805 FACTORY -BUILT CHIMNEYS 805.1 Listing. Factory -built chimneys shall be listed and labeled and shall be installed and terminated in accordance with the manufacturer's installation instructions 805.2 Solid fuel appliances. Factory -built chimneys installed in dwelling units with solid fael-buming appliances shall comply with the Type HT requirements of UL 103 and shall be marked "Type HT" and "Residential Type and Building Heating Appliance Chimney. " Exception: Chimneys for use with open combustion chamber fireplaces shall comply with the requirements of UL 103 and shall be marked "Residential Type and Build- ing Heating Appliance Chimney. " Chimneys for use with open combustion chamber appli- ances installed in buildings other than dwelling units shall comply with the requirements of UL 103 and shall be marked "Building Heatng Apphance Chimney" or "Residential Type and Building Heating Appliance Chimney. " 2018 INTERNAT10NAL MECHANICAL CODE® 87 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.ia Affiee^®,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER CHIMNEYS AND VENTS 805.3 Factory -built chimney offsets. Where a factory -built chimney assembly incorporates offsets, no part of the chim- ney shall be at an angle of more than 30 degrees (0 52 rad) from vertical at any point in the assembly and the chimney assembly shall not include more than four elbows 805.4 Support. Where factory -built chimneys are supported by structural members, such as joists and rafters, such mem- bers shall be designed to support the additional load 805.5 Medium -heat appliances. Factory-bwlt chimneys for medium -heat appliances producing flue gases having a tem- perature above 1,000°F (538°C) measured at the entrance to the chimney shall comply with UL 959 805.6 Decorative shrouds. Decorative shrouds shall not be installed at the termination of factory -built chimneys except where such shrouds are listed and labeled for use with the specific factory -built chimney system and are installed in accordance with Section 304 1 805.7 Insulation shield. Where factory -built chimneys pass through insulated assemblies, an insulation shield constructed of steel having a thickness of not less than 0 0187 inch (0 4712 mm) (No 26 gage) shall be installed to provide clear- ance between the chimney and the insulation material The clearance shall be not less than the clearance to combustibles specified by the chimney manufacturer's installation instruc- tions Where chimneys pass through attic space, the shield shall terminate not less than 2 inches (51 mm) above the insu- lation materials and shall be secured in place to prevent dis- placement Insulation shields provided as part of a listed chimney system shall be installed in accordance with the manufacturer's instructions SECTION 806 METAL CHIMNEYS 806.1 General. Metal chimneys shall be constructed and installed in accordance with NFPA 211 88 2018 INTERNATIONAL MECHANICAL CODE® 1 I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( Fa I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 9 SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL -BURNING EQUIPMENT User note: About this chapter., Chapter 9 focuses on specific types of appliances and fireplaces. It also addresses heatrejectionequipment combus tion engines, gas turbines, kilns, fuel cells, evaporative coolers, radiant heating systems and hydrogen systems. SECTION 901 GENERAL 901.1 Scope. This chapter shall govern the approval, design, installation, construction, maintenance, alteration and repair of the appliances and equipment specifically identified herein and factory -built fireplaces The approval, design, installa- tion, construction, maintenance, alteration and repair of gas - fired appliances shall be regulated by the International Fuel Gas Code 901.2 General. The requirements of this chapter shall apply to the mechanical equipment and appliances regulated by this chapter, in addition to the other requirements of this code 901.3 Hazardous locations. Fireplaces and solid fuel -bum - mg appliances shall not be installed in hazardous locations 901.4 Solid fuel -burning fireplaces and appliances in Group I-2, Condition 2. In Group I-2, Condition 2 occupan- cies, solid fuel -burning fireplaces and appliances are prohib- ited SECTION 902 MASONRY FIREPLACES 902.1 General. Masonry fireplaces shall be constructed in accordance with the International Building Code 902.2 Fireplace accessories. Listed and labeled fireplace accessories shall be installed in accordance with the condi- tions of the listing and the manufacturer's instructions Fire- place accessories shall comply with UL 907. SECTION 903 FACTORY -BUILT FIREPLACES 903.1 General. Factory -built fireplaces shall be listed and labeled and shall be installed in accordance with the condi- tions of the listing Factory -built fireplaces shall be tested in accordance with UL 127 903.2 Hearth extensions. Hearth extensions of approved fac- tory -built fireplaces shall be installed in accordance with the listing of the fireplace The hearth extension shall be readily distinguishable from the surrounding floor area Listed and labeled hearth extensions shall comply with UL 1618 903.3 Unvented gas log heaters. An unvented gas log heater shall not be installed in a factory -built fireplace unless the fireplace system has been specifically tested, listed and labeled for such use in accordance with UL 127 903.4 Gasketed fireplace doors. A gasketed fireplace door shall not be installed on a factory -built fireplace except where the fireplace system has been specifically tested, listed and labeled for such use in accordance with UL 127 SECTION 904 PELLET FUEL -BURNING APPLIANCES 904.1 General. Pellet fael-burning appliances shall be listed and labeled in accordance with ASTM E1509 and shall be installed in accordance with the terms of the listing SECTION 905 FIREPLACE STOVES AND ROOM HEATERS 905.1 General. Fireplace stoves and solid -fuel -type room heaters shall be listed and labeled and shall be installed in accordance with the conditions of the listing Fireplace stoves shall be tested in accordance with UL 737 Solid -fuel -type room heaters shall be tested in accordance with UL 1482 Fireplace inserts intended for installation in fireplaces shall be listed and labeled in accordance with the requirements of UL 1482 and shall be installed in accordance with the manu- facturer's instructions 905.2 Connection to fireplace. The connection of solid fuel appliances to chimney flues serving fireplaces shall comply with Sections 8017 and 801 10 905.3 Hearth extensions. Hearth extensions for fireplace stoves shall be installed in accordance with the listing of the fireplace stove The hearth extension shall be readily distin- guishable from the surrounding floor area Listed and labeled hearth extensions shall comply with UL 1618 SECTION 906 FACTORY -BUILT BARBECUE APPLIANCES 906.1 General. Factory -built barbecue appliances shall be of an approved type and shall be installed in accordance with the manufacturer's instructions, this chapter and Chapters 3, 5, 7 and 8, and the International Fuel Gas Code 2018 INTERNATIONAL MECHANICAL CODE® 89 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)pu,rvantto ( I.i Affiee^®,AOICC Nof th,,e,od�oamfw ,,e od�o¢tbyany ,dPartyo, AMb�Nm-tho�vs3 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢e3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL -BURNING EQUIPMENT SECTION 907 INCINERATORS AND CREMATORIES 907.1 General. Incinerators and crematories shall be listed and labeled in accordance with UL 791 and shall be installed in accordance with the manufacturer's instructions SECTION 908 COOLING TOWERS, EVAPORATIVE :ONDENSERS AND FLUID COOLERS 908.1 General. A cooling tower used in conjunction with an au -conditioning appliance shall be installed in accordance with the manufacturer's instructions Factory -built cooling towers shall be listed in accordance with UL 1995 908.2 Access. Cooling towers, evaporative condensers and fluid coolers shall be provided with ready access 908.3 Location. Cooling towers, evaporative condensers and fluid coolers shall be located to prevent the discharge vapor plumes from entering occupied spaces Plume discharges shall be not less than 5 feet (1524 mm) above or 20 feet (6096 mm) away from any ventilation inlet to a building Location on the property shall be as required for buildings in accor- dance with the International Building Code 908.4 Support and anchorage. Supports for cooling towers, evaporative condensers and fluid coolers shall be designed in accordance with the International Building Code Seismic restraints shall be as required by the International Building Code 908.5 Water supply. Cooling towers, evaporative coolers and fluid coolers shall be provided with an approved water supply, sized for peak demand The quality of water shall be provided in accordance with the equipment manufacturer's recommendations The piping system and protection of the potable water supply system shall be installed as required by the International Plumbing Code 908.6 Drainage. Drains, overflows and blowdown provisions shall be indirectly connected to an approved disposal loca- tion Discharge of chemical waste shall be approved by the appropriate regulatory authority 908.7 Refrigerants and hazardous fluids. Heat exchange equipment that contains a refrigerant and that is part of a closed refrigeration system shall comply with Chapter 11 Heat exhange equipment containing heat transfer fluids which are flammable, combustible or hazardous shall comply with the International Fire Code 908.8 Cooling towers. Cooling towers, both open circuit and closed circuit type, and evaporative condensers shall comply with Sections 908 8 1 and 908 8 2 908.8.1 Conductivity or flow -based control of cycles of concentration. Cooling towers and evaporative condens- ers shall include controls that automate system bleed based on conductivity, fraction of metered makeup volume, metered bleed volume, recirculating pump run time or bleed tune 908.8.2 Drift eliminators. Cooling towers and evapora- tive condensers shall be equipped with drift eliminators that have a maximum drift rate of 0 005 percent of the mr- culated water flow rate as established in the equipment's design specifications SECTION 909 VENTED WALL FURNACES 909.1 General. Vented wall furnaces shall be installed in accordance with their listing and the manufacturer's mstruc- tions OJl-fired furnaces shall be tested in accordance with UL 730 909.2 Location. Vented wall furnaces shall be located so as not to cause a fire hazard to walls, floors, combustible fur- nishings or doors Vented wall furnaces installed between bathrooms and adjoining rooms shall not circulate air from bathrooms to other parts of the building 909.3 Door swing. Vented wall furnaces shall be located so that a door cannot swing within 12 inches (305 mm) of an air inlet or air outlet of such furnace measured at right angles to the opening Doorstops or door closers shall not be installed to obtain this clearance 909.4 Ducts prohibited. Ducts shall not be attached to wall furnaces Casing extension boots shall not be installed unless listed as part of the appliance 909.5 Manual shutoff valve. A manual shutoff valve shall be installed ahead of all controls 909.6 Access. Vented wall furnaces shall be provided with access for cleaning of heating surfaces, removal of burners, replacement of sections, motors, controls, filters and other working parts, and for adjustments and lubrication of parts requiring such attention Panels, grilles and access doors that must be removed for normal servicing operations shall not be attached to the building construction SECTION 910 FLOOR FURNACES 910.1 General. Floor furnaces shall be installed in accor- dance with their listing and the manufacturer's instructions OJl-fired furnaces shall be tested in accordance with UL 729 910.2 Placement. Floor furnaces shall not be installed in the floor of any aisle or passageway of any auditorium, public hall, place of assembly, or in any egress element from any such room or space With the exception of wall register models, a floor furnace shall not be placed closer than 6 inches (152 mm) to the near- est wall, and wall register models shall not be placed closer than 6 inches (152 mm) to a comer The furnace shall be placed such that a drapery or similar combustible object will not be nearer than 12 inches (305 mm) to any portion of the register of the furnace Floor fur- naces shall not be installed in concrete floor construction built on grade The controlling thermostat for a floor furnace shall be located within the same room or space as the floor furnace or shall be located in an adjacent room or space that is permanently open to the room or space containing the floor furnace 910.3 Bracing. The floor around the furnace shall be braced and headed with a support framework design in accordance with the International Building Code 90 2018 INTERNATIONAL MECHANICAL CODE® 1 I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) T--tto S I ( RR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL -BURNING EQUIPMENT 910.4 Clearance. The lowest portion of the floor furnace shall have not less than a 6-inch (152 mm) clearance from the grade level, except where the lower 6-inch (152 mm) portion of the floor furnace is sealed by the manufacturer to prevent entrance of water, the minimum clearance shall be reduced to not less than 2 inches (51 mm) Where these clearances are not present, the ground below and to the sides shall be exca- vated to form a pit under the furnace so that the required clearance is provided beneath the lowest portion of the fur- nace A 12-inch (305 mm) minimum clearance shall be pro- vided on all sides except the control side, which shall have an 18-mch (457 mm) minimum clearance SECTION 911 DUCTFURNACES 911.1 General. Duct furnaces shall be installed in accordance with the manufacturer's instructions Electric duct furnaces shall comply with UL 1996 SECTION 912 INFRARED RADIANT HEATERS 912.1 General. Electric infrared radiant heaters shall com- ply with UL 499 912.2 Support. Infrared radiant heaters shall be fixed in a position independent of fuel and electric supply lines Hang- ers and brackets shall be noncombustible material 912.3 Clearances. Heaters shall be installed with clearances from combustible material in accordance with the manufac- turer's installation instructions SECTION 913 CLOTHES DRYERS 913.1 General. Clothes dryers shall be installed in accor- dance with the manufacturer's instructions Electric residen- tial clothes dryers shall be tested in accordance with UL 2158 Electric coin -operated clothes dryers shall be tested in accordance with UL 2158 Electric commercial clothes dryers shall be tested in accordance with UL 1240 913.2 Exhaust required. Clothes dryers shall be exhausted in accordance with Section 504 913.3 Clearances. Clothes dryers shall be installed with clearance to combustibles in accordance with the manufac- turer's instructions SECTION 914 SAUNA HEATERS 914.1 Location and protection. Sauna heaters shall be located so as to mimmize the possibility of accidental contact by a person in the room 914.1.1 Guards. Sauna heaters shall be protected from accidental contact by an approved guard or barrier of material having a low coefficient of thermal conductivity The guard shall not substantially affect the transfer of heat from the heater to the room 914.2 Installation. Sauna heaters shall be listed and labeled in accordance with UL 875 and shall be installed in accor- dance with their listing and the manufacturer's instructions 914.3 Access. Panels, grilles and access doors that are required to be removed for normal servicing operations shall not be attached to the building 914.4 Heat and time controls. Sauna heaters shall be equipped with a thermostat that will limit room temperature to 194°F (90°C) If the thermostat is not an integral part of the sauna heater, the heat -sensing element shall be located within 6 inches (152 mm) of the ceiling If the heat -sensing element is a capillary tube and bulb, the assembly shall be attached to the wall or other support, and shall be protected against phys- ical damage 914.4.1 Timers. A timer, if provided to control main burner operation, shall have a maximum operating time of 1 hour The control for the timer shall be located outside the sauna room 914.5 Sauna room. A ventilation opening into the sauna room shall be provided The opening shall be not less than 4 inches by 8 inches (102 mm by 203 mm) located near the top of the door into the sauna room 914.5.1 Warning notice. The following perm anent notice, constructed of approved material, shall be mechanically attached to the sauna room on the outside WARNING DO NOT EXCEED 30 MINUTES IN SAUNA EXCESSIVE EXPOSURE CAN BE HARM- FUL TO HEALTH ANY PERSON WITH POOR HEALTH SHOULD CONSULT A PHYSICIAN BEFORE USING SAUNA The words shall contrast with the background and the wording shall be in letters not less than '/q mch (6 4 mm) high Exception: This section shall not apply to one- and two-family dwellings SECTION 915 ENGINE AND GAS TURBINE -POWERED EQUIPMENT AND APPLIANCES 915.1 General. The installation of liquid -fueled stationary internal combustion engines and gas turbines, including exhaust, fuel storage and piping, shall meet the requirements of NFPA 37 Stationary engine generator assemblies shall meet the requirements of UL 2200 915.2 Powered equipment and appliances. Permanently installed equipment and appliances powered by internal com- bushon engines and turbines shall be installed in accordance with the manufacturer's instructions and NFPA 37 SECTION 916 POOL AND SPA HEATERS 916.1 General. Pool and spa heaters shall be installed in accordance with the manufacturer's instructions OJl-fired pool and spa heaters shall be tested in accordance with UL 726 Electric pool and spa heaters shall be tested in accor- 2018 INTERNAT10NAL MECHANICAL CODE® 91 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tto ( I.ia Ag,, ^®,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL -BURNING EQUIPMENT dance with UL 1261 Pool and spa heat pump water heaters shall comply with UL 1995 or CSA C22 2 No 236 Exception: Portable residential spas and portable residen- tial exercise spas shall comply with UL 1563 or CSA C22 2 No 218 1 SECTION 917 COOKING APPLIANCES 917.1 Cooking appliances. Cooking appliances that are designed for permanent installation, including ranges, ovens, stoves, broilers, grills, fryers, griddles and barbecues, shall be listed labeled and installed in accordance with the manufac- turer's instructions Commercial electric cooking appliances shall be listed and labeled in accordance with UL 197 Household electric ranges shall be listed and labeledin accor- dance with UL 858 Microwave cooking appliances shall be listed and labeled in accordance with UL 923 Oil -burning stoves shall be listed and labeled in accordance with UL 896 Solid -fuel -fired ovens shall be listed and labeled in accor- dance with UL 2162 917.2 Domestic appliances. Cooking appliances installed within dwelling units and within areas where domestic cook- ing operations occur shall be listed and labeled as household - type appliances for domestic use SECTION 918 FORCED -AIR WARM -AIR FURNACES 918.1 Forced -air furnaces. Oil -fired furnaces shall be tested in accordance with UL 727 Electric furnaces shall be tested in accordance with UL 1995 Solid fuel furnaces shall be tested in accordance with UL 391 Forced -air furnaces shall be installed in accordance with the listings and the manufac- turer's instructions 918.2 Heat pumps. Electric heat pumps shall be tested in accordance with UL 1995 918.3 Dampers. Volume dampers shall not be placed in the au inlet to a furnace in a manner that will reduce the required air to the furnace 918.4 Circulating air ducts for forced -air warm -air fur- naces. Circulating air for fuel -burning forced -air -type, warm -air furnaces shall be conducted into the blower housing from outside the furnace enclosure by continuous air -tight ducts 918.5 Outdoor and return air openings. Outdoor intake openings shall be located in accordance with Section 401 4 Return air openings shall be located in accordance with Sec- tion 601 5 918.6 Outdoor opening protection. Outdoor air intake openings shall be protected in accordance with Section 401 5 SECTION 919 CONVERSION BURNERS 919.1 Conversion burners. The installation of conversion burners shall conform to ANSI Z21 8 SECTION 920 UNIT HEATERS 920.1 General. Unit heaters shall be installed in accordance with the listing and the manufacturer's instructions Oil -fired unit heaters shall be tested in accordance with UL 731 920.2 Support. Suspended -type unit heaters shall be sup- ported by elements that are designed and constructed to accommodate the weight and dynamic loads Hangers and brackets shall be of noncombustible material Suspended - type oil -fired unit heaters shall be installed in accordance with NFPA 31 920.3 Ductwork. A unit heater shall not be attached to a warm -air duct system unless listed for such installation SECTION 921 VENTED ROOM HEATERS 921.1 General. Vented room heaters shall be listed and labeled and shall be installed in accordance with the condi- tions of the listing and the manufacturer's instructions SECTION 922 KEROSENE AND OIL -FIRED STOVES 922.1 General. Kerosene and oil -fired stoves shall be listed and labeled and shall be installed in accordance with the con- ditions of the listing and the manufacturer's instructions Ker- osene and oil -fired stoves shall comply with NFPA 31 and UL 896 SECTION 923 SMALL CERAMIC KILNS 923.1 General. Kilns shall be listed and labeled unless other- wise approved in accordance with Section 105 2 Electric kilns shall comply with UL 499 The approval of unlisted appliances in accordance with Section 105 2 shall be based on approved engineering evaluation 923.1.1 Installation. Kilns shall be installed in accordance with the manufacturer's instructions and the provisions of this code SECTION 924 STATIONARY FUEL CELL POWER SYSTEMS 924.1 General. Stationary fuel cell power systems having a power output not exceeding 10 MW shall be tested in accor- dance with ANSI/CSA America FC 1 and shall be installed in accordance with the manufacturer's instructions, NFPA 853, the Intemational Building Code and the International Fire Code SECTION 925 MASONRY HEATERS 925.1 General. Masonry heaters shall be constructed in accordance with the International Building Code. 92 2018 INTERNATIONAL MECHANICAL CODE® 1 I CopyaghtOoz0ly ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) Tummtto S I ( Fa I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL -BURNING EQUIPMENT SECTION 926 GASEOUS HYDROGEN SYSTEMS 926.1 Installation. The installation of gaseous hydrogen sys- tems shall be in accordance with the applicable requirements of this code, the International Fire Code, the International Fuel Gas Code and the International Builckng Code SECTION 927 RADIANT HEATING SYSTEMS 927.1 General. Electric radiant heating systems shall be installed in accordance with the manufacturer's instructions and shall be listed for the application 927.2 Clearances. Clearances for radiant heating panels or elements to any wiring, outlet boxes and junction boxes used for installing electrical devices or mounting luminaires shall be in accordance with the International Building Code and NFPA 70 927.3 Installation on wood or steel framing. Radiant panels installed on wood or steel framing shall conform to the fol- lowing requirements 1 Heating panels shall be installed parallel to framing members and secured to the surface of framing mem- bers or shall be mounted between framing members 2 Mechanical fasteners shall penetrate only the unheated portions provided for this purpose Panels shall not be fastened at any point closer than'/q inch (6 4 mm) to an element Other methods of attachment of the panels shall be in accordance with the panel installation instructions 3 Unless listed and labeled for field cutting, heating pan- els shall be installed as complete units 927.4 Installation in concrete or masonry Radiant heating systems installed in concrete or masonry shall conform to the following requirements Radiant heating systems shall be identified as being suitable for the installation, and shall be secured in place as specified in the manufacturer's instructions Radiant heating panels and radiant heating panel sets shall not be installed where they bridge expansion joints unless they are protected from expansion and contraction 927.5 Finish surfaces. Finish materials installed over radiant heating panels and systems shall be installed in accordance with the manufacturer's instructions Surfaces shall be secured so that fasteners do not pierce the radiant heating ele- ments SECTION 928 EVAPORATIVE COOLING EQUIPMENT 928.1 General. Evaporative cooling equipment shall 1 Be installed in accordance with the manufacturer's instructions 2 Be installed on level platforms in accordance with Sec- tion 304 10 3 Have openings in exterior walls or roofs flashed in accordance with the International Building Code 4 Be provided with an approved water supply, sized for peak demand The quality of water shall be provided in accordance with the equipment manufacturer's recom- mendations The piping system and protection of the potable water supply system shall be installed as required by the International Plumbing Code 5 Have au intake opening locations in accordance with Section 401 4 SECTION 929 HIGH -VOLUME LARGE -DIAMETER FANS 929.1 General. Where provided, high -volume large -diameter fans shall be tested and labeled in accordance with AMCA 230, listed and labeled in accordance with UL 507, and installed in accordance with the manufacturer's instructions 2018 INTERNAT10NAL MECHANICAL CODE® 93 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tto ( I.i Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 94 2018 INTERNATIONAL MECHANICAL CODE® ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S ( " I I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEA G RE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 10 BOILERS, WATER HEATERS AND PRESSURE VESSELS User note: About this chapter., Chapter 10 addresses boilers, water heaters, expansion tanks and pressure vessels in general, such as compressed air vessels. This chapter includes requirements for components ofhydronic HVAC systems, with the focus being on safety, maintenance, testing and safety control devices. SECTION 1001 GENERAL 1001.1 Scope. This chapter shall govern the installation, alteration and repair of boilers, water heaters and pressure vessels Exceptions: 1 Pressure vessels used for unheated water supply 2 Portable unfired pressure vessels and Interstate Commerce Commission containers 3 Containers for bulk oxygen and medical gas 4 Unfired pressure vessels having a volume of 5 cubic feet (0 14 m') or less operating at pressures not exceeding 250 pounds per square inch (psi) (1724 kPa) and located within occupancies of Groups B, F, H, M, R, S and U 5 Pressure vessels used in refrigeration systems that are regulated by Chapter 11 of this code 6 Pressure tanks used in conjunction with coaxial cables, telephone cables, power cables and other similar humidity control systems 7 Any boiler or pressure vessel subject to inspection by federal or state inspectors SECTION 1002 WATER HEATERS 1002.1 General. Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accordance with the manufacturer's instructions, the Internaional Plumbing Code and this code Water heaters shall be capable of being removed without first removing a permanent portion of the building structure The potable water connections and relief valves for all water heaters shall conform to the require- ments of the Internaional Plumbing Code Domestic electric water heaters shall comply with UL 174 or UL 1453 Com- mercial electric water heaters shall comply with UL 1453 Oil -fired water heaters shall comply with UL 732 Solid - fuel -fired water heaters shall comply with UL 2523 Solar thermal water heating systems shall comply with Chapter 14 and ICC 900/SRCC 300 1002.2 Water heaters utilized for space heating. Water heaters utilized both to supply potable hot water and provide hot water for space -heating applications shall be listed and labeled for such applications by the manufacturer and shall be installed in accordance with the manufacturer's instruc- tions and the Intemahonal Plumbing Code 1002.2.1 Sizing. Water heaters utilized for both potable water heating and space -heating applications shall be sized to prevent the space -heating load from diminishing the required potable water -heating capacity 1002.2.2 Temperature limitation. Where a combination potable water -heating and space -heating system requires water for space heating at temperatures higher than 140°F (60°C), a temperature -actuated mixing valve that conforms to ASSE 1017 shall be provided to temper the water sup- plied to the potable hot water distribution system to a tem- perature of 140°F (60°C) or less 1002.3 Supplemental water -heating devices. Potable water - heating devices that utilize refrigerant -to -water heat exchang- ers shall be approved and installed in accordance with the International Plumbing Code and the manufacturer's instruc- tions SECTION 1003 PRESSURE VESSELS 1003.1 General. All pressure vessels, unless otherwise approved, shall be constructed and certified in accordance with the ASME Boiler and Pressure Vessel Code, and shall be installed in accordance with the manufacturer's instruc- tions and nationally recognized standards Directly fired pres- sure vessels shall meet the requirements of Section 1004 1003.2 Piping. All piping materials, fittings, joints, connec- tions and devices associated with systems utilized in conjunc- tion with pressure vessels shall be designed for the specific application and shall be approved 1003.3 Welding. Welding on pressure vessels shall be per- formed by an R-Stamp holder in accordance with the Nahonal Board Ispechon Code, Part 3 or in accordance with an approved standard SECTION 1004 BOILERS 1004.1 Standards. Boilers shall be designed, constructed and certified in accordance with the ASME Boiler and Pressure Vessel Code, Section I or IV Controls and safety devices for boilers with fuel input ratings of 12,500,000 Btu/hr (3,662,500 W) or less shall meet the requirements of ASME CSD-1 Controls and safety devices for boilers with inputs greater than 12,500,000 Btu/hr (3,662,500 W) shall meet the requirements of NFPA 85 Packaged oil -fired boilers shall be listed and labeled in accordance with UL 726 Packaged elec- 2018 INTERNAT10NAL MECHANICAL CODE® 95 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)pu,rvantto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER BOILERS, WATER HEATERS AND PRESSURE VESSELS tric boilers shall be listed and labeled in accordance with UL 834 Solid -fuel -fired boilers shall be listed and labeled in accordance with UL 2523 1004.2 Installation. In addition to the requirements of this code, the installation of boilers shall conform to the manufac- turer's instructions Operating instructions of a permanent type shall be attached to the boiler Boilers shall have all con- trols set, adjusted and tested by the installer The manufac- turer's rating data and the nameplate shall be attached to the boiler 1004.3 Working clearance. Clearances shall be maintained around boilers, generators, heaters, tanks and related equip- ment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges Where boilers are installed or replaced, clearance shall be provided to allow access for inspection, maintenance and repair Passageways around all sides of boilers shall have an unobstructed width of not less than 18 inches (457 mm), unless otherwise approved 1004.3.1 Top clearance. Clearances from the tops of boil- ers to the ceiling or other overhead obstruction shall be in accordance with Table 1004 3 1 TABLE 1004.3.1 BOILER TOP CLEARANCES MINIMUM CLEARANCES FROM TOP OF BOILER TO BOILER TYPE CEILING OR OTHER OVERHEAD OBSTRUCTION (feet) All boilers with manholes on top of the boiler except where a greater clearance is required in 3 thus table All boilers without manholes on top of the boiler except lugh-pressure steam boilers and 2 where a greater clearance is required in this table High-pressure steam boilers with steam generat- ing capacity not exceeding 5,000 pounds per 3 hour High-pressure steam boilers with steam gener- 7 acing capacity exceeding 5,000 pounds per hour High-pressure steam boilers having heating sur- 3 face not exceeding 1,000 square feet High-pressure steam boilers having heating sur- 7 face in excess of 1,000 square feet High-pressure steam boilers with input not 3 exceeding 5,000,000 Btu/h High-pressure steam boilers with input in 7 excess of 5,000,000 Btu/h Steam -heating boilers and hot water -heating 3 boilers with mput exceeding 5,000,000 Btu/h Steam -heating boilers exceeding 5,000 pounds 3 of steam per hour Steam -heating boilers and hot water -heating boilers hawing heating surface exceeding 1,000 3 square feet For SI 1 foot =3048 into, 1 square foot =0 0929 in', 1 pound per hour = 0 4536 kg/h, 1 Btu/hr = 0 293 W 1004.4 Mounting. Equipment shall be set or mounted on a level base capable of supporting and distributing the weight contained thereon Boilers, tanks and equipment shall be secured in accordance with the manufacturer's installation instructions 1004.5 Floors. Boilers shall be mounted on floors of non- combustible construction, unless listed for mounting on com- bustible flooring 1004.6 Boiler rooms and enclosures. Boiler rooms and enclosures and access thereto shall comply with the Intema- tional Building Code and Chapter 3 of this code Boiler rooms shall be equipped with a floor dram or other approved means for disposing of liquid waste 1004.7 Operating adjustments and instructions. Hot water and steam boilers shall have all operating and safety controls set and operationally tested by the installing contractor A complete control diagram and boiler operating instructions shall be furnished by the installer for each installation SECTION 1005 BOILER CONNECTIONS 1005.1 Valves. Every boiler or modular boiler shall have a shutoff valve in the supply and return piping For multiple boiler or multiple modular boiler installations, each boiler or modular boiler shall have individual shutoff valves in the supply and return piping Exception: Shutoff valves are not required in a system having a single low-pressure steam boiler 1005.2 Potable water supply. The water supply to all boilers shall be connected in accordance with the International Plumbing Code SECTION 1006 SAFETY AND PRESSURE RELIEF VALVES AND CONTROLS 1006.1 Safety valves for steam boilers. Steam boilers shall be protected with a safety valve 1006.2 Safety relief valves for hot water boilers. Hot water boilers shall be protected with a safety relief valve 1006.3 Pressure relief for pressure vessels. Pressure vessels shall be protected with a pressure relief valve or pressure -lim- iting device as required by the manufacturer's installation instructions for the pressure vessel 1006.4 Approval of safety and safety relief valves. Safety and safety relief valves shall be listed and labeled and shall have a minimum rated capacity for the equipment or appli- ances served Safety and safety relief valves shall be set at not greater than the nameplate pressure rating of the boiler or pressure vessel 1006.5 Installation. Safety or relief valves shall be installed directly into the safety or relief valve opening on the boiler or pressure vessel Valves shall not be located on either side of a safety or relief valve connection The relief valve shall dis- charge by gravity 96 2018 INTERNATIONAL MECHANICAL CODE® 1 I CITY IEhtOo2.01vICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf dwood mm).(Qtyof PRmdNmod)O,d,,Nomb,,x10081vms ocJM 10-0 m. oo PM (PST) T--tto S I ( Fa I.i AEffi,­,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOow.d 9e�gleuva ody mpyncg andoetwodwgp�okb¢e3 ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER BOILERS, WATER HEATERS AND PRESSURE VESSELS 1006.6 Safety and relief valve discharge. Safety and relief valve discharge pipes shall be of rigid pipe that is approved for the temperature of the system High -pressure -steam safety valves shall be vented to the outside of the structure The dis- charge piping serving pressure relief valves, temperature relief valves and combinations of such valves shall 1 Not be directly connected to the drainage system 2 Discharge through an air break located in the same room as the appliance 3 Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air break 4 Serve a single relief device and shall not connect to piping serving any other relief device or equipment 5 Discharge to the floor, to the pan serving the boiler or storage tank, to a waste receptor or to the outdoors 6 Discharge in a manner that does not cause personal injury or structural damage 7 Discharge to a termination point that is readily observable by the building occupants 8 Not be trapped 9 Be installed so as to flow by gravity 10 Not terminate more than 6 inches (152 mm) above the floor or waste receptor 11 Not have a threaded connection at the end of such pip- ing 12 Not have valves or tee fittings 13 Be constructed of those materials listed in Section 605 4 of the International Plumbing Code or materi- als tested, rated and approved for such use in accor- dance with ASN E Al 12 4 1 1006.7 Boiler safety devices. Boilers shall be equipped with controls and limit devices as required by the manufacturer's installation instructions and the conditions of the listing 1006.8 Electrical requirements. The power supply to the electrical control system shall be from a two -wire branch cir- cuit that has a grounded conductor, or from an isolation trans- former with a two -wire secondary Where an isolation transformer is provided, one conductor of the secondary winding shall be grounded Control voltage shall not exceed 150 volts nominal, line to line Control and limit devices shall interrupt the ungrounded side of the circuit A means of man- ually disconnecting the control circuit shall be provided and controls shall be arranged so that when deenergized, the burner shall be inoperative Such disconnecting means shall be capable of being locked in the off position and shall be provided with ready access SECTION 1007 BOILER LOW-WATER CUTOFF 1007.1 General. Steam and hot water boilers shall be pro- tected with a low-water cutoff control Exception: A low-water cutoff is not required for coJl- type and water -tube -type boilers that require forced circu- lation of water through the boiler and that are protected with a flow sensing control 1007.2 Operation. Low-water cutoff controls and flow sens- ing controls required by Section 1007 1 shall automatically stop the combustion operation of the appliance when the water level drops below the lowest safe water level as estab- lished by the manufacturer or when water circulation stops, respectively SECTION 1008 BOTTOM BLOWOFF VALVE 1008.1 General. Steam boilers shall be equipped with bottom blowoff valve(s) The valve(s) shall be installed in the open- ing provided on the boiler The minimum size of the valve(s) and associated piping shall be the size specified by the boiler manufacturer or the size of the boiler blowoff-valve opening Where the maximum allowable working pressure of the boiler exceeds 100 psig (689 kPa), two bottom blowoff valves shall be provided consisting of either two slow -open- ing valves in series or one quick -opening valve and one slow - opening valve in series, with the quick -opening valve installed closest to the boiler 1008.2 Discharge. Blowoff valves shall discharge to a safe place of disposal Where discharging to the drainage system, the installation shall conform to the International Plumbing Code SECTION 1009 HOT WATER BOILER EXPANSION TANK 1009.1 Where required. An expansion tank shall be installed in every hot water system For multiple boiler instal- lations, not less than one expansion tank is required Expan- sion tanks shall be of the closed or open type Tanks shall be rated for the pressure of the hot water system Exception: Expansion tanks shall not be required in the collector loop of dram -back systems 1009.2 Closed -type expansion tanks. Closed -type expan- sion tanks shall be installed in accordance with the manufac- turer's instructions Expansion tanks for systems designed to have an operating pressure in excess of 30 psi (207 kPa) shall be constructed and certified in accordance with the ASN E Boiler and Pressure Vessel Code The size of the tank shall be based on the capacity of the hot -water -heating system The minimum size of the tank shall be determined in accordance with the following equation where all necessary information is known (0 00041 T— 0 0466) VS VJ (Equation 10-1) (PGl (PGl p f) \,pG 2018 INTERNAT10NAL MECHANICAL CODE® 97 I I 1 I CopyrightOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER BOILERS, WATER HEATERS AND PRESSURE VESSELS For SI (0 000738 T — 0 03348) VS Vt = rr r 1 \P) \PG/ where Vr = Nfinimum volume of tanks (gallons) (L) V = Volume of system, not including expansion tanks (gallons) (L) T = Average operating temperature (OF) (OC) Pa = Atmospheric pressure (psi) (kPa) Pt = Fill pressure (psi) (kPa) Po = Maximum operating pressure (psi) (kPa) Where all necessary information is not known, the mim- mum size of the tank shall be determined from Table 1009 2 TABLE 1009.2 CLOSED -TYPE EXPANSION TANK SIZING SYSTEM VOLUME IN GALLONS TANK CAPACITIES IN GALLONS Pressurized Diaphragm Type Nonpressurized Type 100 9 15 200 17 30 300 25 45 400 33 60 500 42 75 1,000 83 12 2,000 165 300 For SI 1 gallon =3 795 L 1009.3 Open -type expansion tanks. Open -type expansion tanks shall be located not less than 4 feet (1219 mm) above the highest heating element The tank shall be adequately sized for the hot water system An overflow with a minimum diameter of 1 inch (25 mm) shall be installed at the top of the tank The overflow shall discharge to the drainage system in accordance with the International Plumbing Code SECTION 1010 GAUGES 1010.1 Hot water boiler gauges. Every hot water boiler shall have a pressure gauge and a temperature gauge, or a combi- nation pressure and temperature gauge The gauges shall indi- cate the temperature and pressure within the normal range of the system's operation 1010.2 Steam boiler gauges. Every steam boiler shall have a water -gauge glass and a pressure gauge The pressure gauge shall indicate the pressure within the normal range of the sys- tem's operation 1010.2.1 Water -gauge glass. The gauge glass shall be installed so that the midpoint is at the normal boiler water level SECTION 1011 TESTS 1011.1 Tests. Upon completion of the assembly and installa- tion of boilers and pressure vessels, acceptance tests shall be conducted in accordance with the requirements of the ASME Boiler and Pressure Vessel Code or the manufacturer's requirements, and such tests shall be approved A copy of all test documents along with all manufacturer's data reports required by the ASME Boiler and Pressure Vessel Code shall be submitted to the code official 1011.2 Test gauges. An indicating test gauge shall be con- nected directly to the boiler or pressure vessel where it is vis- ible to the operator throughout the duration of the test The pressure gauge scale shall be graduated over a range of not less than one and one-half times and not greater than four tines the maximum test pressure Gauges utilized for testing shall be calibrated and certified by the test operator 98 2018 INTERNATIONAL MECHANICAL CODE® CITY IEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) T--tto S I (firill Fa I.i A&g,vo ,AOICC Nof th,, ,od,S,o,,,o u ,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER CHAPTER 11 REFRIGERATION User note: About this chapter., Chapter 11 provides for the protection of life and property from the potential fire and health hazards associated with refrigerant chemicals and the machinery that contains such chemicals. Some refrigerants are toxic, some are flammable and some are both. This chapter refers to the International Fire Code®, ASHRAE 15 and BAR standards 2 through 5. SECTION 1101 GENERAL 1101.1 Scope. This chapter shall govern the design, installa- tion, construction and repair of refrigeration systems that vaporize and liquefy a fluid during the refrigerating cycle Refrigerant piping design and installation, including pressure vessels and pressure relief devices, shall conform to this code Permanently installed refrigerant storage systems and other components shall be considered as part of the refrigera- tion system to which they are attached 1101.2 Factory -built equipment and appliances. Listed and labeled self-contained, factory -built equipment and appli- ances shall be tested in accordance with UL 207, 412, 471 or 1995 Such equipment and appliances are deemed to meet the design, manufacture and factory test requirements of this code if installed in accordance with their listing and the man- ufacturer's instructions 1101.3 Protection. Any portion of a refrigeration system that is subject to physical damage shall be protected in an approved manner 1101.4 Water connection. Water supply and discharge con- nections associated with refrigeration systems shall be made in accordance with this code and the Internahonal Plumbing Code 1101.5 Fuel gas connection. Fuel gas devices, equipment and appliances used with refrigeration systems shall be installed in accordance with the International Fuel Gas Code. 1101.6 General. Refrigeration systems shall comply with the requirements of this code and, except as modified by this code, ASHRAE 15 Ammonia -refrigerating systems shall comply with this code and, except as modified by this code, ASHRAE 15, IIAR 2, IIAR 3, IIAR 4 and IIAR 5 1101.7 Maintenance. Mechanical refrigeration systems shall be maintained in proper operating condition, free from accu- mulations of oil, dirt, waste, excessive corrosion, other debris and leaks 1101.8 Change in refrigerant type. The type of refrigerant in refrigeration systems having a refrigerant circuit contain- ing more than 220 pounds (99 8 kg) of Group Al or 30 pounds (13 6 kg) of any other group refrigerant shall not be changed without prior notification to the code official and compliance with the applicable code provisions for the new refrigerant type [F] 1101.9 Refrigerant discharge. Notification of refriger- ant discharge shall be provided in accordance with the Inter- nahonalFireCode 1101.10 Locking access port caps. Refrigerant circuit access ports located outdoors shall be fitted with locking -type tam- per -resistant caps or shall be otherwise secured to prevent unauthorized access Exception: This section shall not apply to refrigerant cir- cuit access ports on equipment installed in controlled areas such as on roofs with locked access hatches or doors SECTION 1102 SYSTEM REQUIREMENTS 1102.1 General. The system classification, allowable refrig- erants, maximum quantity, enclosure requirements, location limitations, and field pressure test requirements shall be determined as follows 1 Determine the refrigeration system's classification, in accordance with Section 1103 3 2 Determine the refrigerant classification in accordance with Section 1103 1 3 Determine the maximum allowable quantity of refriger- ant in accordance with Section 1104, based on type of refrigerant, system classification and occupancy 4 Determine the system enclosure requirements in accor- dance with Section 1104 5 Refrigeration equipment and appliance location and installation shall be subject to the limitations of Chapter 3 6 Nonfactory-tested, field -erected equipment and appli- ances shall be pressure tested in accordance with Sec- tion 1108 1102.2 Refrigerants. The refrigerant shall be that which the equipment or appliance was designed to utilize or converted to utilize Refrigerants not identified in Table 1103 1 shall be approved before use 1102.2.1 Mixing. Refrigerants, including refrigerant blends, with different designations in ASHRAE 34 shall not be mixed in a system Exception: Addition of a second refrigerant is allowed where permitted by the equipment or appliance manu- 2018 INTERNAT10NAL MECHANICAL CODE® 99 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) mtto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFRIGERATION facturer to improve oil return at low temperatures The refrigerant and amount added shall be in accordance with the manufacturer's instructions 1102.2.2 Purity. Refrigerants used in refrigeration sys- tems shall be new, recovered or reclaimed refrigerants in accordance with Section 1102 2 2 1, 1102 2 2 2 or 1102223 Where required by the equipment or appliance owner or the code official, the installer shall furnish a signed declaration that the refrigerant used meets the requirements of Section 1102221, 1102222 or 1102223 Exception: The refrigerant used shall meet the purity specifications set by the manufacturer of the equipment or appliance in wluch such refrigerant is used where such specifications are different from that specified in Sections 110222 1, 1102 2 2 2 and 1102223 1102.2.2.1 New refrigerants. Refrigerants shall be of a purity level specified by the equipment or appliance manufacturer 1102.2.2.2 Recovered refrigerants. Refrigerants that are recovered from refrigeration and air-conditioning systems shall not be reused in other than the system from which they were recovered and in other systems of the same owner Recovered refrigerants shall be fil- tered and dried before reuse Recovered refrigerants that show clear signs of contamination shall not be reused unless reclaimed in accordance with Section 1102223 1102.2.2.3 Reclaimed refrigerants. Used refrigerants shall not be reused in a different owner's equipment or appliances unless tested and found to meet the purity requirements of ARI 700 Contaminated refrigerants shall not be used unless reclaimed and found to meet the purity requirements of ARI 700 1102.3 Access port protection. Refrigerant access ports shall be protected in accordance with Section 1101 10 when- ever refrigerant is added to or recovered from refrigeration or au -conditioning systems SECTION 1103 REFRIGERATION SYSTEM CLASSIFICATION 1103.1 Refrigerant classification. Refrigerants shall be clas- sified in accordance with ASHRAE 34 as listed in Table 1103 1 1103.2 Occupancy classification. Locations of refrigerating systems are described by occupancy classifications that con- sider the ability of people to respond to potential exposure to refrigerants Where equipment or appliances, other than pip- ing, are located outside a building and within 20 feet (6096 mm) of any building opening, such equipment or appliances shall be governed by the occupancy classification of the building Occupancy classifications shall be defined as fol- lows 1 Institutional occupancy is that portion of premises from which occupants cannot readily leave without the assis- tance of others because they are disabled, debilitated or confined Institutional occupancies include, among oth- ers, hospitals, nursing homes, asylums and spaces con - taming locked cells 2 Public assembly occupancy is that portion of premises where large numbers of people congregate and from which occupants cannot quickly vacate the space Pub- lic assembly occupancies include, among others, audi- toriums, ballrooms, classrooms, passenger depots, restaurants and theaters 3 Residential occupancy is that portion of premises that provides the occupants with complete independent lw- mg facilities, including permanent provisions for lw- mg, sleeping, eating, cooking and sanitation Residential occupancies include, among others, donru- tones, hotels, multiunit apartments and private resi- dences 4 Commercial occupancy is that portion of premises where people transact business, receive personal ser- vice or purchase food and other goods Commercial occupancies include, among others, office and profes- sional buildings, markets (but not large mercantile occupancies) and work or storage areas that do not qualify as industrial occupancies 5 Large mercantile occupancy is that portion of premises where more than 100 persons congregate on levels above or below street level to purchase personal mer- chandise 6 Industrial occupancy is that portion of premises that is not open to the public, where access by authorized per- sons is controlled, and that is used to manufacture, pro- cess or store goods such as chemicals, food, lee, meat or petroleum 7 Nfixed occupancy occurs where two or more occupan- cies are located within the same building Where each occupancy is isolated from the rest of the building by tight walls, floors and ceilings and by self -closing doors, the requirements for each occupancy shall apply to its portion of the bwldmg Where the various occu- pancies are not so isolated, the occupancy having the most stringent requirements shall be the governing occupancy 1103.3 System classification. Refrigeration systems shall be classified according to the degree of probability that refriger- ant leaked from a failed connection, seal or component could enter an occupied area The distinction is based on the basic design or location of the components 1103.3.1 Low -probability systems. Double -indirect open -spray systems, indirect closed systems and indirect - vented closed systems shall be classified as low-probabil- Jty systems, provided that all refrigerant -containing piping and fittings are isolated where the quantities in Table 1103 1 are exceeded 1103.3.2 High -probability systems. Direct systems and indirect open -spray systems shall be classified as high - probability systems Exception: An indirect open -spray system shall not be required to be classified as a high -probability system if 100 2018 INTERNATIONAL MECHANICAL CODE® 1 I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER REFRIGERATION y0 W Q O O O O O O O 0 O VD0 0 0 O O O O p O O O O O 0 O W Q OZ N N N N N N N N N N N N N N N N cv N N N N N J 0 0 0 0 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O W � p a U N O W a u ^E o 0 0 0 0 0 0 0 0 0 0 0 0 0 u O rc w a z Z o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 rc LL W K LL O � o f y O 6 � 'aU Q C U J O a �z QO wLL N N fyl N N N fyl fyl fyl N w N W Q LL J U O w w J N � Td Q tj C ti O R W b J7 x ° ° ° ° ° N ri o ° ,� U N �y oj SS to �n 'C' fn aFi w i` o y° SS U41 N U U F J Z Q CX VW W , Pa In Q fn Q Z LL U W N fn fn Q N N fn N O (�I N f�l O Q O Vl — — — N N N L1a N N N N N U Q 2018 INTERNAT10NAL MECHANICAL CODE® 101 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsedby HDOP, Van Cm,(hvdmep,,d—od Pm),(Qtyof FRmdNmod)O[d6 Nomb6x100elvms OIJM 10-0 m. oo PAL (PST) tto ( I.—A,e^®,AOICC NOf th,,e,od,¢,oamfw ,,e od,¢,o¢tbyany ,dPartyo, AMb�tmaNho d 9cgle ass¢Ody mpyncg and Mwodwgp�dkb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISIRIBVTIO NIS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFRIGERATION 0 y0 ywj rc o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 K H O O O O O O O O O O O O O O O O O O O O WQ N N N N N N N N N N N N N N N N N N N N OZ LL O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O J O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O V W 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0- O O O O O O O O O O Q a N O W a U o t` 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o t� tJ a N�o� o �n e N o fn o� Q e m o� O� Q fn m u1 t` m 0 N N -. N N rn rn N N N rn rn -. -. Q Q rc w a Ro 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 rc E o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 w a o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 w n o t� o o e rn rn o t� rn of o �n �n of o Q Q Q—-- e- Q— Q—— � -. N N N N -. N LL W K LL O 0 0 Z � w Q a C U J O a z0 QO O LL Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q N LL N KV �m w m o 0 of N o �n o in o 0 0 o O N ,-. ,-. rn e N N t` of o o e o u1 e Q VO fM fM O O O O fn V1 Vl O O O Vl 0 O O O v O Vl v Q_ Q_ v Q v v N_ N N N W W Q Q Q Q Q Q Q Q N N N O O N Vl N tp O O tp tp tp tp V - N N � �- O O N N Q N N N Ot Ot N N Q N O Vl Vl Vl Vl Q Q Q Vl Vl N N W fn Q Q N N .� fn fn fn Vl Vl Vl N N N N N Vl � F, N F, N N Vl Vl O O Vl Vl P P W_ Q Vl Vl Vl OR JN N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N I N O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 0 0 0 O O O O O O O O O O O O O O O O O O O O O O O O O O O o 0 0 0 0 LL N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N F J Z Q t? W 0 0¢ N M Q �Q V¢l m¢� r (=,1 W 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -Er Q 102 2018 INTERNATIONAL MECHANICAL CODE® C',ght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP, Cm Cm, (hv dmep ,,d—od om),(Qtyof FRm6 dNmod)O[dNomb6x100elvms Oljm 10-0 m. oo PAL (PST) L-mPott, S I ( LomP, Agffiem�mtanih IC NO FLLh, T,odomo,, oALLh, gAod,A,o,, by any thod Party O[ Axmboem POow.d &,gle—oolym, and Mwodwg p,okb¢ed ANY VNAVTHO SPEED REP RODVCIION OR DIPTRIBVTIO N IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFRIGERATION wrc rc s o 0 0 0 0 0 0 0 0 0 O m o 0 0 0 0 0 0 o 0 0 Q O x cv cv cv cv cv cv cv cv cv cv N .LL..O O O O O O O O O O O O O O O O O O O O O O O O O O W J O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 0 0 0 a N O W a u U o 0 o 0 0 0 o 0 0 0 0 0 0 tJ e of m m of u1 of p K W a R o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o d d d d o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N LL W K LL 0 0 p f � d Z y Q a C U O a z2 QO O LL Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q LL'N LL N �g e o o O o � m o � o z o iv u Ot P W ti Vl Vl N Vl W Q O W v `d b Q N O m N b � N ,ti W a O U ti ti W W Vl O O O O O O P O Ot tD w O Vl 0 W tD N O �C Vl O N -74 [i� v w tD tD tD tD tD `d b N tD m N� v O v v v tD �y v v tD Q O O `� ti � � N m m m m m m m m m N m Q m Vl Q^ tD Vl W N N N Q^ O O m Vl Vl m Ot y) O Vl Vl Q Vl Vl Vl Vl Vl Vl Vl Q Vl ti Vl '� Vl P N O P P P P Vl P O O Vl '� '� O O '-' oI N N N m N N N N N N N m N ci m N ci m N W �n oI N N N N N N W oI N oI N N ci m ci m oI N � ci m jN N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N tl � LL N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N F J Z Q U 2o ¢ ¢ a ¢ ¢ a ¢ a w ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ ¢ mm a ¢ ¢ ¢ a i rc W Ot Ot O�� N N N N N N N N N N N N N m N Q N Vl N tD N P N W N Ot N O� m m N m m m m m m mm m Q m Vl m tD m tD m P m W m Ot m O e W e N e V W Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q 17 17 Q Q Q Q Q Q Q 2018 INTERNATIONAL MECHANICAL CODE® 103 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsedby HDOP, Van Cm,(hvdmep,,d—od Pm),(Qtyof FRmdNmod)O[d6 Nomb6x100elvms OIJM 10-0 m. oo PAL (PST) tto ( I.—A,e^®,AOICC NOf th,,e,od,¢,oamfw ,,e od,¢,o¢tbyany ,dPartyo, AMb�NmaNho d 9cgle ass¢Ody mpyncg and Mwodwgp�dkb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISIRIBVTIO NIS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFRIGERATION CZ U 0 IF U O LL co N J J a0 V Hz Z K W G K w K wo wrc yWj¢ o o o o 0 0 0 ox N N N N N N N .LL..O W J O O O O O O O O O O O O O O O O O O O O O (J W a N O W a U U f" 0 p a rn rn rn Q ,-. N rn Q u1 N N rn K W a z Ro 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 rc E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LL W K LL 0 0 p z d J w �� Ot ,-. to N vl tD Q to O to to P tD to ,-. W N Q to Q � �'a o Q a C U O a Fz z0 OLL Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q LL'N LL N rc JQW F 0 N z 0 0 0 0 0 N N N p o � Z V OQN aJ Q N N N vl vl Ot vl O tD vl vl S Li T W U O tD OR OR N Q Q O " N_ N to to O to fn fn to W W Ot tD Q O N N ti N N ti N ti N ti Vl Q O Q ,y Q Q Ot �� Q Q Vl O Vl Vl N V% V% Vl `d v V1 Q V1 fn tD tD N N V1 N V1 fn ^ fn N N b N� Q Q N N Vl N fn Q ti W 0 N fyl fyl P fyl fyl fyl � fyl fyl N N N fyl N N N a a a a a a a a a O O O O O O O O O O N N N N N ON N N N N N N LL F ,z Q K U O ZW' R' fn Q Q Q Q Q Vl Q tD Q P Q W Q Ot Q O Vl .� Vl .� Vl N Vl O O O N O fn O Q O P O W O W O Ot O V'LL Q Q Q Q Q Q Q Q Q Q Q Q Vl Vl Vl Vl Vl Vl Vl Vl Vl K fP4 P4 P4 P4 P4 P4 104 2018 INTERNATIONAL MECHANICAL CODE® firill ' CITFIghtOoz0ly ICC ALL RIGHTS RESERVED Awsedby HDOP, Van Cm, (hv dmep ,,d—od Pm),(Qtyof FRmdNmod)O[d6N=b6x100elvms ocJM 10-0 m. oo PAL (PST)pu�rvantto S I ( Ll17,—Affiee^®t',AOICC Nof th,, ,od,�,o,,,o ih,,e od,�,o¢tbyany ,dPartyo, AMb�NmPOod &,gl—,odA,o,,,g and Mwodwgp,okb¢ed ANY VNAVTHORIVED REPRODUCTION ORD ISIRIBVTIO NIS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFRIGERATION y0 .LLOLL .. W U W O O O O U7 tD 0 0 0 tD 0 tD O Q O N O O N O W O I O SEC O I a O W a U Q Q e of of N N u1 u1 u1 t` U O rc z ¢ o 0 0 0 0 0 0 0 0 0 0 0 0 w n o 0 0 0 0 0 o O o 0 0 � Q � LL W K LL O o F Z O � d O O M.2 6 P W Ot Vl O — Ot V1 W W � .Qr vl In P h Qa aU o o '" N o 0 0 0 O Q u1 Q V o C U a° f z QO K¢ O LL Q Q Q Q Q Q Q Q Pa Pa Q Q Q Q Q Q Q N LL N KV C as 0 J w as p p U O SO b ri b cC x O lx .'c ,rye o J O O O O O x U U x O N E x U U V U O O O O a� SOT, 0 E Qm W J W w� Q Q Q Q Cg Q N u x ro ro o fn o V W 2018 INTERNATIONAL MECHANICAL CODE® 105 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsedby HDOP, Van Dme(hv dmep ,,d—od om),(Qtyof FRmdNmod)O[d6N=b6x100elvms ocJM 10-0 m. oo PAL (PST) Potto ( LieAg,,—® 'Ath ICC No (L h, T,odomo,, m ALLh¢ gAodomo,, by any thod Party o, Axmboem P Ood 9cgle ¢i , ody ,o,,,g and oetwodwgp,okb¢ed ANY VNAVTHORIVED REPRODUCTION OR DIPTRIBVTIO N IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFRIGERATION E* the pressure of the secondary coolant is at all times (operating and standby) greater than the pressure of the refrigerant SECTION 1104 SYSTEM APPLICATION REQUIREMENTS 1104.1 General. The refrigerant, occupancy and system clas- sification cited in this section shall be determined in accor- dance with Sections 1103 1, 1103 2 and 1103 3, respectively 1104.2 Machinery room. Except as provided in Sections 1104 2 1 and 1104 2 2, all components containing the refrig- erant shall be located either outdoors or in a machinery room where the quantity of refrigerant in an independent circuit of a system exceeds the amounts shown in Table 1103 1 For refrigerant blends not listed in Table 1103 1, the same requirement shall apply where the amount for any blend com- ponent exceeds that indicated in Table 1103 1 for that compo- nent Tlus requirement shall also apply where the combined amount of the blend components exceeds a limit of 69,100 parts per million (ppm) by volume Machinery rooms required by this section shall be constructed and maintained in accordance with Section 1105 for Group Al and Bl refrig- erants and in accordance with Sections 1105 and 1106 for Group A2, B2, A3 and B3 refrigerants Exceptions: 1 Machinery rooms are not required for listed equip- ment and appliances containing not more than 6 6 pounds (3 kg) of refrigerant, regardless of the refrig- erant's safety classification, where installed in accordance with the equipment's or appliance's list- ing and the equipment or appliance manufacturer's installation instructions 2 Piping m conformance with Section 1107 is allowed in other locations to connect components installed in a machinery room with those installed outdoors 1104.2.1 Institutional occupancies. The amounts shown in Table 1103 1 shall be reduced by 50 percent for all areas of institutional occupancies except kitchens, labora- tories and mortuaries The total of all Group A2, B2, A3 and B3 refrigerants shall not exceed 550 pounds (250 kg) in occupied areas or machinery rooms 1104.2.2 Industrial occupancies and refrigerated rooms. This section applies only to rooms and spaces that are within industrial occupancies, contain a refrigerant evaporator, are maintained at temperatures below 68°F (20°C), and are used for manufacturing, food and bever- age preparation, meat cutting, other processes and storage Where a machinery room would otherwise be required by Section 1104 2, a machinery room shall not be required where all of the following conditions are met 1 The space containing the machinery is separated from other occupancies by tight construction with tight -fitting doors 2 Access is restricted to authorized personnel Refrigerant detectors are installed as required for machinery rooms in accordance with Section 11053 Exceptions: 1 Refrigerant detectors are not required in unoccupied areas that contain only continu- ous piping that does not include valves, valve assemblies, equipment, or equipment connections Where approved alternatives are provided, refrigerant detectors for ammonia refrigera- tion are not required for rooms or areas that are always occupied, and for rooms or areas that have lugh humidity or other harsh environmental conditions that are incompatible with detection devices 4 Surfaces having temperatures exceeding 800°F (427°C) and open flames are not present where any Group A2, B2, A3 or B3 refrigerant is used (see Section 1104 3 4) 5 All electrical equipment and appliances conform to Class 1, Division 2, hazardous location classifica- tion requirements of NFPA 70 where the quantity of any Group A2, B2, A3 or B3 refrigerant, other than ammonia, in a single independent circuit would exceed 25 percent of the lower flammability limit (LFL) upon release to the space 6 All refrigerant -containing parts in systems with a total connected compressor power exceeding 100 horsepower (hp) (74 6 kW) ---except evaporators used for refrigeration or dehumidification, condens- ers used for heating, control and pressure relief valves for either, low -probability pumps and con- necting piping —are located either outdoors or in a machinery room 1104.3 Refrigerant restrictions. Refrigerant applications, maximum quantities and use shall be restricted in accordance with Sections 1104 3 1 through 1104 3 4 1104.3.1 Air-conditioning for human comfort. In other than industrial occupancies where the quantity in a single independent circuit does not exceed the amount in Table 1103 1, Group Bl, B2 and B3 refrigerants shall not be used in high -probability systems for au -conditioning for human comfort 1104.3.2 Nonindustrial occupancies. Group A2 and B2 refrigerants shall not be used in high -probability systems where the quantity of refrigerant in any independent refrigerant circuit exceeds the amount shown in Table 1104 3 2 Group A3 and B3 refrigerants shall not be used except where approved Exception: This section does not apply to laboratories where the floor area per occupant is not less than 100 square feet (9 3 m) 1104.3.3 All occupancies. The total of all Group A2, B2, A3 and B3 refrigerants other than R-717, ammonia, shall not exceed 1,100 pounds (499 kg) except where approved 106 2018 INTERNATIONAL MECHANICAL CODE® 1 I Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER REFRIGERATION 1104.3.4 Protection from refrigerant decomposition. Where any device having an open flame or surface tem- perature greater than 800°F (427°C) is used in a room con- taining more than 6 6 pounds (3 kg) of refrigerant in a single independent circuit, a hood and exhaust system shall be provided in accordance with Section 510 Such exhaust system shall exhaust combustion products to the outdoors Exception: A hood and exhaust system shall not be required where any of the following apply 1 The refrigerant is R-717, R-718 or R-744 2 The combustion air is ducted from the outdoors in a manner that prevents leaked refrigerant from being combusted 3 A refrigerant detector is used to stop the combus- tion in the event of a refrigerant leak (see Sec- tions 11053 and 1105 5) 1104.4 Volume calculations. Volume calculations shall be in accordance with Sections 1104 4 1 through 1104 4 3 1104.4.1 Noncommunicating spaces. Where the refriger- ant -containing parts of a system are located in one or more spaces that do not communicate through permanent open- ings or HVAC ducts, the volume of the smallest, enclosed occupied space shall be used to determine the permissible quantity of refrigerant in the system 1104.4.2 Communicating spaces. Where an evaporator or condenser is located in an air duct system, the volume of the smallest, enclosed occupied space served by the duct system shall be used to determine the maximum allowable quantity of refrigerant in the system Exception: If airflow to any enclosed space cannot be reduced below one -quarter of its maximum, the entire space served by the air duct system shall be used to determine the maximum allowable quantity of refriger- ant in the system 1104.4.3 Plenums. Where the space above a suspended ceiling is continuous and part of the supply or return air plenum system, this space shall be included in calculating the volume of the enclosed space 1105.2 Openings. Ducts and air handlers in the machinery room that operate at a lower pressure than the room shall be sealed to prevent any refrigerant leakage from entering the airstream [F] 1105.3 Refrigerant detector. Refrigerant detectors in machinery rooms shall be provided as required by Sections 605 8 and 605 17 of the International Fire Code 1105.4 Tests. Periodic tests of the mechanical ventilating system shall be performed in accordance with manufacturer's specifications and as required by the code official 1105.5 Fuel -burning appliances. Fuel -burning appliances and equipment having open flames and that use combustion air from the machinery room shall not be installed in a machinery room Exceptions: 1 Where the refrigerant is carbon dioxide or water 2 Fuel -burning appliances shall not be prohibited in the same machinery room with refrigerant -contain- ing equipment or appliances where combustion air is ducted from outside the machinery room and sealed in such a manner as to prevent any refrigerant leak- age from entering the combustion chamber, or where a refrigerant vapor detector is employed to automati- cally shut off the combustion process in the event of refrigerant leakage 1105.6 Ventilation. Machinery rooms shall be mechanically ventilated to the outdoors Exception: Where a refrigerating system is located out- doors more than 20 feet (6096 mm) from any building opening and is enclosed by a penthouse, lean-to or other open structure, natural or mechanical ventilation shall be provided Location of the openings shall be based on the relative density of the refrigerant to air The free -aperture cross section for the ventilation of the machinery room shall be not less than F = G (Equation 11-1) For SI F = 0 138.,r where SECTION 1105 F = The free opening area in square feet (m) MACHINERY ROOM, GENERAL REQUIREMENTS G = The mass of refrigerant in pounds (kg) in the largest [BF] 1105.1 Design and construction. Machinery rooms system, any part of which is located in the shall be designed and constructed in accordance with the machinery room International Building Code and this section TABLE 1104.3.2 MAXIMUM PERMISSIBLE QUANTITIES OF REFRIGERANTS TYPE OF REFRIGERATION SYSTEM MAXIMUM POUNDS FOR VARIOUS OCCUPANCIES Institutional Assembly Residential All other occupancies Sealed absorption system In exit access 0 0 33 33 In adjacent outdoor locations 0 0 22 22 In other trim exit access 0 66 66 66 Unit systems In other trim exit access 0 0 66 66 For SI 1 pound = 0 454 kg 2018 INTERNATIONAL MECHANICAL CODE® 107 I I1 I CITFIghtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dwood mm).(Qtyof FRmdNmod)O,d,,Nomb,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFRIGERATION 1105.6.1 Discharge location. The discharge of the air shall be to the outdoors in accordance with Chapter 5 Exhaust from mechanical ventilation systems shall be dis- charged not less than 20 feet (6096 mm) from a property line or openings into buildings 1105.6.1.1 Indoor exhaust opening location. Indoor mechanical exhaust intake openings shall be located where refrigerant leakage is likely to concentrate based on the refrigerant's relative density to au, and the loca- tions of the air current paths and refrigerating machm- ery 1105.6.2 Makeup air. Provisions shall be made for makeup air to replace that being exhausted Openings for makeup air shall be located to avoid intake of exhaust air Supply and exhaust ducts to the machinery room shall not serve any other area, shall be constructed in accordance with Chapter 5 and shall be covered with corrosion -resis- tant screen of not less than '/q inch (6 4 mm) mesh 1105.6.3 Ventilation rate. For other than ammoma sys- tems, the mechanical ventilation systems shall be capable of exhausting the minimum quantity of air both at normal operating and emergency conditions, as required by Sec- tions 1105 6 3 1 and 1105 6 3 2 The minimum required emergency ventilation rate for ammonia shall be 30 air changes per hour in accordance with IIAR2 Multiple fans or multispeed fans shall be allowed to produce the emer- gency ventilation rate and to obtain a reduced airflow for normal ventilation 1105.6.3.1 Quantity —normal ventilation. During occupied conditions, the mechanical ventilation system shall exhaust the larger of the following 1 Not less than 0 5 cfm per square foot (0 0025 m'/s •m') of machinery room area or 20 cfm (0 009 m /s) per person 2 A volume required to limit the room temperature rise to 18'F (IO'C) taking into account the ambi- ent heating effect of all machinery in the room 1105.6.3.2 Quantity —emergency conditions. Upon actuation of the refrigerant detector required in Section 1105 3, the mechanical ventilation system shall exhaust air from the machinery room in the following quantity Q = 100 x �FG (Equation 11-2) For SI Q = 0 07 x FG where Q = The airflow in cubic feet per minute (m'/s) G = The design mass of refrigerant in pounds (kg) in the largest system, any part of which is located in the machinery room. 1105.7 Termination of relief devices. Pressure relief devices, fusible plugs and purge systems located within the machinery room shall terminate outside of the structure at a location not less than 15 feet (4572 mm) above the adjoining grade level and not less than 20 feet (6096 mm) from any window, ventilation opening or exit 1105.8 Ammonia ammoma systems ASHRAE 15 discharge. Pressure relief valves for shall discharge in accordance with [F] 1105.9 Emergency pressure control system. Perma- nently installed refrigeration systems containing more than 6 6 pounds (3 kg) of flammable, toxic or highly toxic refrig- erant or ammoma shall be provided with an emergency pres- sure control system in accordance with Section 605 10 of the International Fire Code. SECTION 1106 MACHINERY ROOM, SPECIAL REQUIREMENTS 1106.1 General. Where required by Section 1104 2, the machinery room shall meet the requirements of this section in addition to the requirements of Section 1105 1106.2 Elevated temperature. There shall not be an open flame -producing device or continuously operating hot surface over 800'F (427°C) permanently installed in the room 1106.3 Ammonia room ventilation. Ventilation systems in ammonia machinery rooms shall be operated continuously at the ventilation rate specified in Section 1105 6 3 Exceptions: 1 Machinery rooms equipped with a vapor detector that will automatically start the ventilation system at the ventilation rate specified in Section 110563, and that will actuate an alarm at a detection level not to exceed 1,000 ppm 2 Machinery rooms conforming to the Class 1, Divi- sion 2, hazardous location classification require- ments of NFPA 70 1106.4 Flammable refrigerants. Where refrigerants of Groups A2, A3, B2 and B3 are used, the machinery room shall conform to the Class 1, Division 2, hazardous location classification requirements of NFPA 70 Exceptions: 1 Ammonia machinery rooms that are provided with ventilation in accordance with Section 11063 2 Machinery rooms for systems containing Group A2L refrigerants that are in accordance with Section 11065 1106.5 Special requirements for Group A21, refrigerant machinery rooms. Machinery rooms for systems containing Group AM refrigerants shall comply with Sections 1106 5 1 through 1106 5 3 Exception: Machinery rooms conforming to the Class I, Division 2, hazardous location classification requirements of NFPA 70 are not required to comply with Sections 1106 5 1 and 1106 5 2 [F] 1106.5.1 Refrigerant detection system. The machin- ery room shall be provided with a refrigerant detection system The refrigerant detection system shall be in accor- dance with Section 605 8 of the International Fire Code and all of the following 1 The detectors shall activate at or below a refrigerant concentration of 25% of the LFL. 2 Upon activation, the detection system shall activate the emergency ventilation system required by Sec- tion 1106 5 2 3 The detection, signaling and control circuits shall be supervised 108 2018 INTERNATIONAL MECHANICAL CODE® firi1 I UER CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) T--tto S I ( I.i A&g,vo ,AOICC Nof th,, ,od,S,00.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER REFRIGERATION 1106.5.2 Emergency ventilation system. An emergency ventilation system shall be provided at the minimum exhaust rate specified in ASHRAE 15 or Table 1106 5 2 Shutdown of the emergency ventilation system shall be by manual means TABLE 1106.5.2 MINIMUM EXHAUST RATES REFRIGERANT Q(misec) QlcfmI R32 154 32,600 R143 136 28,700 R444A 646 13,700 R444B 106 22,400 R445A 783 16,600 R446A 239 50,700 R447A 238 50,400 R451A 704 15,000 R451B 705 15,000 R1234yf 780 16,600 R1234ze(E) 592 12,600 1106.5.3 Emergency ventilation system discharge. The emergency ventilation system point of discharge to the atmosphere shall be located outside of the structure at not less than 15 feet (4572 mm) above the adjoining grade level and not less than 20 feet (6096 mm) from any win- dow, ventilation opening or exit [F] 1106.6 Remote controls. Remote control of the mechani- cal equipment and appliances located in the machinery room shall comply with Sections 1106 6 1 and 1106 6 2 [F] 1106.6.1 Refrigeration system emergency shutoff. A clearly identified switch of the break -glass type or with an approved tamper -resistant cover shall provide off -only control of refrigerant compressors, refrigerant pumps, and normally closed, automatic refrigerant valves located in the machinery room Additionally, this equipment shall be automatically shut off whenever the refrigerant vapor con- centration in the machinery room exceeds the vapor detec- tor's upper detection limit or 25 percent of the LEL, whichever is lower [F] 1106.6.2 Ventilation system. A clearly identified switch of the break -glass type or with an approved tamper - resistant cover shall provide on -only control of the machinery roam ventilation fans [F] 1106.7 Emergency signs and labels. Refrigeration units and systems shall be provided with approved emergency signs, charts, and labels in accordance with the International Fire Code SECTION 1107 REFRIGERANT PIPING 1107.1 General. The design of refrigerant piping shall be in accordance with ASN E B31 5 Refrigerant piping shall be installed, tested and placed in operation in accordance with this chapter 1107.2 Piping location. Refrigerant piping that crosses an open space that affords passageway in any bwldmg shall be not less than 7 feet 3 inches (2210 mm) above the floor unless the piping is located against the ceiling of such space Refrig- erant piping shall not be placed in any of the following 1 A fire -resistance -rated exit access corridor 2 An interior exit stairway 3 An interior exit ramp 4 An exit passageway 5 An elevator, dumbwaiter or other shaft containing a moving object 6 A shaft that has one or more openings into a fire -resis- tance -rated exit access corridor, interior exit stairway or ramp or exit passageway 1107.2.1 Piping in concrete floors. Refrigerant piping installed in concrete floors shall be encased in pipe ducts The piping shall be isolated and supported to prevent dam- aging vibration, stress and corrosion 1107.2.2 Refrigerant penetrations. Refrigerant piping shall not penetrate floors, ceilings or roofs Exceptions: 1 Penetrations connecting the basement and the first floor 2 Penetrations connecting the top floor and a machinery penthouse or roof installation 3 Penetrations connecting adjacent floors served by the refrigeration system 4 Penetrations by piping in a direct system where the refrigerant quantity does not exceed Table 1103 1 for the smallest occupied space through which the piping passes 5 In other than industrial occupancies and where the refrigerant quantity exceeds Table 1103 1 for the smallest space, penetrations for piping that connects separate pieces of equipment that are either 51 Enclosed by an approved gas -tight, fire -resistive duct or shaft with open- ings to those floors served by the refrig- eration system 52 Located on the exterior of the building where vented to the outdoors or to the space served by the system and not used as an air shaft, closed court or similar space 1107.3 Pipe enclosures. Rigid or flexible metal enclosures or pipe ducts shall be provided for soft, annealed copper tubmg and used for refrigerant piping erected on the premises and containing other than Group Al or B1 refrigerants Enclo- sures shall not be required for connections between condens- ing units and the nearest riser box(es), provided such connections do not exceed 6 feet (1829 mm) in length 1107.4 Condensation. Refrigerating piping and fittings, brine piping and fittings that, during normal operation, will 2018 INTERNATIONAL MECHANICAL CODE® 109 I I l I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFRIGERATION reach a surface temperature below the dew point of the sur- rounding air, and are located in spaces or areas where con- densation will cause a safety hazard to the building occupants, structure, electrical equipment or any other equip - mentor appliances, shall be protected in an approved manner to prevent such damage 1107.5 Materials for refrigerant pipe and tubing. Piping materials shall be as set forth in Sections 1107 5 1 through 110755 1107.5.1 Steel pipe. Carbon steel pipe with a wall thick- ness not less than Schedule 80 shall be used for Group A2, A3, B2 or B3 refrigerant liquid lines for sizes 15 inches (38 mm) and smaller Carbon steel pipe with a wall thick- ness not less than Schedule 40 shall be used for Group Al or Bl refrigerant liquid Imes 6 inches (152 mm) and smaller, Group A2, A3, B2 or B3 refrigerant liquid lines sizes 2 inches (51 mm) through 6 inches (152 mm) and all refrigerant suction and discharge lines 6 inches (152 mm) and smaller Type F steel pipe shall not be used for refrig- erant lines having an operating temperature less than -20°F (-29°C) 1107.5.2 Copper and copper -alloy pipe. Standard iron - pipe size, copper and copper -alloy (not less than 80-per- cent copper) pipe shall conform to ASTM B42 and ASTM B43 1107.5.3 Copper tube. Copper tube used for refrigerant piping erected on the premises shall be seamless copper tube of Type ACR (hard or annealed) complying with ASTM B280 or ASTM B819 Annealed temper copper tube shall not be used in sizes larger than a 2-inch (51 mm) nominal size Mechanical joints other than press -connect joints listed for refrigerant piping shall not be used on annealed temper copper tube in sizes larger than % inch (22 2 mm) OD size 1107.5.4 Copper tubing joints. Copper tubing joints used in refrigerating systems containing Group A2, A3, B2 or B3 refrigerants shall be brazed Soldered joints shall not be used in such refrigerating systems 1107.5.5 Aluminum tube. Type 3003-0 aluminum tubing with high-pressure fittings shall not be used with methyl chloride and other refrigerants known to attack aluminum 1107.6 Joints and refrigerant -containing parts in air ducts. Joints and all refrigerant -containing parts of a refriger- ating system located in an air duct of an au -conditioning sys- tem carrying conditioned au to and from human -occupied space shall be constructed to withstand, without leakage, a pressure of 150 percent of the higher of the design pressure or pressure relief device setting 1107.7 Exposure of refrigerant pipe joints. Refrigerant pipe joints erected on the premises shall be exposed for visual inspection prior to being covered or enclosed 1107.8 Stop valves. Systems containing more than 6 6 pounds (3 kg) of a refrigerant in systems using positive -dis- placement compressors shall have stop valves installed as fol- lows 1 At the inlet of each compressor, compressor unit or condensing unit 2 At the discharge outlet of each compressor, compressor unit or condensing unit and of each liquid receiver Exceptions: 1 Systems that have a refrigerant pumpout function capable of storing the entire refrigerant charge in a receiver or heat exchanger 2 Systems that are equipped with provisions for pumpout of the refrigerant using either portable or permanently installed recovery equipment 3 Self-contained systems 1107.8.1 Liquid receivers. Systems containing 100 pounds (45 kg) or more of a refrigerant, other than systems utilizing nonpositive displacement compressors, shall have stop valves, in addition to those required by Section 1107 8, on each inlet of each liquid receiver Stop valves shall not be required on the inlet of a receiver in a con- densing unit, nor on the inlet of a receiver that is an inte- gral part of the condenser 1107.8.2 Copper tubing. Stop valves used with soft annealed copper tubing or hard -drawn copper tubing'/g inch (22 2 mm) OD standard size or smaller shall be securely mounted, independent of tubing fastenings or supports 1107.8.3 Identification. Stop valves shall be identified where their intended purpose is not obvious Numbers shall not be used to label the valves, unless a key to the numbers is located near the valves SECTION 1108 FIELD TEST 1108.1 General. Every refrigerant -containing part of every system that is erected on the premises, except compressors, condensers, vessels, evaporators, safety devices, pressure gauges and control mechanisms that are listed and factory tested, shall be tested and proved tight after complete installa- tion, and before operation Tests shall include both the high - and low-pressure sides of each system at not less than the lower of the design pressures or the setting of the pressure relief device(s) The design pressures for testing shall be those listed on the condensing unit, compressor or compres- sor unit nameplate, as required by ASHRAE 15 Exceptions: 1 Gas bulk storage tanks that are not permanently con- nected to a refrigeration system 2 Systems erected on the premises with copper tubing not exceeding % inch (15 8 mm) OD, with wall thickness as required by ASHRAE 15, shall be tested in accordance with Section 1108 1, or by means of refrigerant charged into the system at the saturated vapor pressure of the refrigerant at 70°F (21°C) or higher 3 Limited -charge systems equipped with a pressure relief device, erected on the premises, shall be tested at a pressure not less than one and one-half times the pressure setting of the relief device If the equipment or appliance has been tested by the manufacturer at 110 2018 INTERNATIONAL MECHANICAL CODE® Fk ff.,( 1 I CITY IEhtOo2.01v ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto I RR I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER REFRIGERATION one and one-half times the design pressure, the test after erection on the premises shall be conducted at the design pressure 1108.1.1 Booster compressor. Where a compressor is used as a booster to obtain an intermediate pressure and discharges into the suction side of another compressor, the booster compressor shall be considered to be a part of the low side, provided that it is protected by a pressure relief device 1108.1.2 Centrifugal/nonposifive displacement com- pressors. In field-testing systems using centrifugal or other nonposifive displacement compressors, the entire system shall be considered as the low -side pressure for field test purposes 1108.2 Test gases. Tests shall be performed with an inert dried gas including, but not limited to, nitrogen and carbon dioxide Oxygen, au, combustible gases and mixtures con - taming such gases shall not be used Exception: The use of air is allowed to test R-717, ammo- nia, systems provided that they are subsequently evacu- ated before charging with refrigerant 1108.3 Test apparatus. The means used to build up the test pressure shall have either a pressure -limiting device or a pres- sure -reducing device and a gauge on the outlet side 1108.4 Declaration. A certificate of test shall be provided for all systems containing 55 pounds (25 kg) or more of refriger- ant The certificate shall give the name of the refrigerant and the field test pressure applied to the high side and the low side of the system The certification of test shall be signed by the installer and shall be made part of the public record [F] SECTION 1109 PERIODIC TESTING [F] 1109.1 Testing required. The following emergency devices and systems shall be periodically tested in accor- dance with the manufacturer's instructions and as required by the code official 1 Treatment and flaring systems 2 Valves and appurtenances necessary to the operation of emergency refrigeration control boxes 3 Fans and associated equipment intended to operate emergency ventilation systems 4 Detection and alarm systems 2018 INTERNATIONAL MECHANICAL CODE® ill I I l I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 112 2018 INTERNATIONAL MECHANICAL CODE® Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGRE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 12 HYDRONIC PIPING User note: About this chapter., Chapter 12 addresses the piping systems used in heating and cooling systems. Such piping typically conveys water, water and antifreeze solutions, steam and condensate. The fluids conveyed are heated or cooled by boilers, chillers, and heat pumps, which are all components ofHVAC systems. SECTION 1201 GENERAL 1201.1 Scope. The provisions of this chapter shall govern the construction, installation, alterahon and repair of hydronic piping systems This chapter shall apply to hydronic piping systems that are part of heating, ventilation and air -condition - mg systems Such piping systems shall include steam, hot water, chilled water, steam condensate and ground source heat pump loop systems Potable cold and hot water distribu- tion systems shall be installed in accordance with the Interna- honal Plumbing Code 1201.2 Sizing. Piping and piping system components for hydronic systems shall be sized for the demand of the system 1201.3 Standards. As an alternative to the provisions of Sec- tions 1202 and 1203, piping shall be designed, installed, inspected and tested in accordance with ASME B31 9. SECTION 1202 MATERIAL 1202.1 Piping. Piping material shall conform to the standards cited in this section Exception: Embedded piping regulated by Section 1209 1202.2 Used materials. Reused pipe, fittings, valves or other materials shall be clean and free of foreign materials and shall be approved by the code official for reuse 1202.3 Material rating. Materials shall be rated for the oper- ating temperature and pressure of the hydronic system Mate- rials shall be suitable for the type of fluid in the hydronic system 1202.4 Piping materials standards. Hydronic pipe shall conform to the standards listed in Table 1202 4 The exterior of the pipe shall be protected from corrosion and degradation TABLE 1202.4 HYDRONIC PIPE MATERIAL STANDARD (see Chapter 15) Acrylomtnle butadiene styrene ASTM D1527, ASTM F2806 (ABS) plastic pipe Chlonmted polyvinyl chlonde ASTM D2846, ASTM F441, (CPVC) plastic pipe ASTM F442 Copper or copper -alloy pipe ASTM B42, ASTM B43, ASTM B302 Copper or copper -alloy tube ASTM B75, ASTM B88, (Type K, L or M) ASTM B 135, ASTM B251 Cross -linked polyethylene/ aluminum/cross-linked ASTM F1281, polyethylene (PEX-AL-PEX) CSA CAN/CSA-B-137 10 pressure pipe Cross -linked polyethylene ASTM F876 (PEX) tubing Ductile iron pipe AW WA C115/A21 15, AW WA C151 /A21 51 Lead pipe FS WW-P-325B Polyethylene/aluminum/poly- ethylene (PE -AL -PE) pressure ASTM F1282, CSA B137 9 pipe Polypropylene (PP) plastic pipe ASTM F2389 Polyvinyl chloride (PVC) ASTM D1785, ASTM D2241 plastic pipe Raised temperature poly- ASTM F2623, ASTM F2769, ethylene CSA B 137 18 (PE-RT) Steel pipe ASTM A53, ASTM A106 Steel tubing ASTM A254 2018 INTERNATIONAL MECHANICAL CODE® 113 I I 1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)pu,rvantto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER HYDRONIC PIPING 1202.5 Pipe fittings. Hydronic pipe fittings shall be approved for installation with the piping materials to be installed, and shall conform to the respective pipe standards or to the standards listed in Table 1202 5 TABLE 1202.5 HYDRONIC PIPE FITTINGS MATERIAL STANDARD (see Chapter 15) ASME B 16 15, Copper and copper alloys ASME B 16 18, ASME B 16 22, ASME B16 26, ASME B16 24, ASME B16 51, ASSE 1061, ASTM F1974 ANSI/AW WA C110/A21 10, AW WA Ductile iron and gray iron C153/A21 53, ASTM A395, ASTM A536, ASTM F1476, ASTM F1548 Ductile iron ANSI/AWWA C153/A21 53 Grayiron ASTMA126 Malleable iron ASME B 16 3 ASSE 1061, ASTM D3261, ASTM PE-RT fittings F1807, ASTM F2098, ASTM F2159, ASTM F2735, ASTM F2769, CSA B137 1, CSA B137 18 ASSE 1061, ASTM F877, ASTM PEX fittings F1807, ASTM F1960, ASTM F2080, ASTM F2159 ASTM D2466, ASTM D2467, Plastic ASTM F438, ASTM F439, ASTM F877, ASTM F2389, ASTM F2735 ASME B 16 5, ASME B 16 9, ASME B 16 11, ASME B 16 28, Steel ASTM A53, ASTM At 06, ASTM A234, ASTM A395, ASTM A420, ASTM A536, ASTM F1476, ASTM F1548 1202.6 Valves. Valves shall be constructed of materials that are compatible with the type of piping material and fluids in the system Valves shall be rated for the temperatures and pressures of the systems in which the valves are installed 1202.7 Flexible connectors, expansion and vibration com- pensators. Flexible connectors, expansion and vibration con- trol devices and fittings shall be of an approved type SECTION 1203 JOINTS AND CONNECTIONS 1203.1 Approval. Joints and connections shall be of an approved type Joints and connections shall be tight for the pressure of the hydromc system 1203.1.1 Joints between different piping materials. Joints between different piping materials shall be made with approved adapter fittings 1203.2 Preparation of pipe ends. Pipe shall be cut square, reamed and chamfered, and shall be free of burrs and obstruc- tions Pipe ends shall have full -bore openings and shall not be undercut 1203.3 Joint preparation and installation. Where required by Sections 1203 4 through 1203 12, the preparation and installation of brazed, mechanical, soldered, solvent- cemented, threaded and welded joints shall comply with Sec- tions 1203 3 1 through 1203 3 8 2 1203.3.1 Brazed joints. Joint surfaces shall be cleaned An approved flux shall be applied where required The joint shall be brazed with a filler metal conforming to AW S A5 8 1203.3.2 Mechanical joints. Mechanical joints shall be installed in accordance with the manufacturer's mstruc- tions 1203.3.3 Soldered joints. Solder joints shall be made in accordance with ASTM B828 Cut tube ends shall be reamed to the full inside diameter of the tube end A flux conforming to ASTM B813 shall be applied The joint shall be soldered with a solder conforming to ASTM B32 1203.3.4 Solvent -cemented joints. Joint surfaces shall be clean and free of moisture An approved primer shall be applied to CPVC and PVC pipe-lomt surfaces Joints shall be made while the cement is wet Solvent cement con- forming to the following standards shall be applied to all joint surfaces 1 ASTM D2235 for ABS joints 2 ASTMF493forCPVClomts 3 ASTM D2564 for PVC joints CPVC joints shall be made in accordance with ASTM D2846 Exception: For CPVC pipe joint connections, a primer is not required where all of the following conditions apply 1 The solvent cement used is third -party certified as conforming to ASTM F493 2 The solvent cement is yellow in color 3 The solvent cement is used only for joining '/z inch (12 7 mm) through 2-inch (51 mm) diameter CPVC pipe and fittings 4 The CPVC pipe and fittings are manufactured in accordance with ASTM D2846 1203.3.5 Threaded joints. Threads shall conform to ASME B1 20 1 Schedule 80 or heavier plastic pipe shall be threaded with dies specifically designed for plastic pipe Thread lubricant, pipe -joint compound or tape shall be applied on the male threads only and shall be approved for application on the piping material 1203.3.6 Welded joints. Joint surfaces shall be cleaned by an approved procedure Joints shall be welded with an approved filler metal 1203.3.7 Grooved and shouldered mechanical joints. Grooved and shouldered mechanical joints shall conform to the requirements of ASTM F 1476 and shall be installed in accordance with the manufacturer's instructions 1203.3.8 Mechanically formed tee fittings. Mechanically extracted outlets shall have a height not less than three times the thickness of the branch tube wall 1203.3.8.1 Full flow assurance. Branch tubes shall not restrict the flow in the run tube A dimple/depth stop shall be formed in the branch tube to ensure that pene- 114 2018 INTERNATIONAL MECHANICAL CODE® 1 I CopynghtOoZ.0I7ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm DmA(hvmdmepf dA od mm).(Qtyof FRmdNmod)O[do,N=b,,x10081vms ocJPK 10-0 m. oo PAL(PST) IA,mootto S I ( LomP,Ag-PKtaAth ICC No(Uth,T,odomoo.m AUO, gAodomo,, by any Ood Party o, AAmboe®amhoossd 9oghA oKIA,o,aogPodoetwodmgIAokb¢ed ANY VNAVTHORIVED RBPROD VCIION OR DISI RI B VTION IS VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER HYDRONIC PIPING tration into the outlet is of the correct depth For inspec- tion purposes, a second dimple shall be placed Yq inch (6 4 mm) above the first dimple Dimples shall be aligned with the tube run 1203.3.8.2 Brazed joints. Mechanically formed tee fit- tings shall be brazed in accordance with Section 12033 1 1203.4 ABS plastic pipe. Joints between ABS plastic pipe or fittings shall be solvent -cemented or threaded j oints conform - NO mg to Section 1203 3 1203.5 Copper or copper -alloy pipe. Joints between copper or copper -alloy pipe or fittings shall be brazed, mechanical, soldered, threaded or welded joints conforming to Section 12033 1203.6 Copper or copper -alloy tubing. Joints between cop- per or copper -alloy tubing or fittings shall be brazed, mechan- ical or soldered joints conform mg to Section 1203 3, flared joints conforming to Section 1203 6 1, push -fit joints con- form ing to Section 1203 62 or press -connect joints conform - mg to Section 1203 6 3 1203.6.1 Flared joints. Flared joints shall be made by a tool designed for that operation 1203.6.2 Push -fit joints. Push -fit joints shall be installed in accordance with the manufacturer's instructions 1203.6.3 Press -connect joints. Press-connect7oints shall be installed in accordance with the manufacturer's instruc- tions 1203.7 CPVC plastic pipe. Joints between CPVC plastic pipe or fittings shall be solvent -cemented or threaded joints conforming to Section 1203 3 1203.8 Polybutylene plastic pipe and tubing. Joints between polybutylene plastic pipe and tubing or fittings shall be mechanical joints conforming to Section 1203 3 or heat- fusionjointsconforming to Section 1203 8 1 1203.8.1 Heat -fusion joints. Joints shall be of the socket - fusion or butt -fusion type Joint surfaces shall be clean and free of moisture Joint surfaces shall be heated to melt temperatures and joined The joint shall be undisturbed until cool Joints shall be made in accordance with ASTM D3309 1203.9 Cross -linked polyethylene (PEX) plastic tubing. Joints between cross -linked polyethylene plastic tubing and fittings shall conform to Sections 1203 9 1 through 1203 9 3 Mechanical joints shall conform to Section 1203 3 1203.9.1 Compression -type fittings. Where compres- sion -type fittings include inserts and ferrules or O-rmgs, the fittings shall be installed without omitting the inserts and ferrules or O-rmgs 1203.9.2 Plastic -to -metal connections. Soldering on the metal portion of the system shall be performed not less than 18 inches (457 mm) from a plastic -to -metal adapter in the same water line 1203.9.3 Push -fit joints. Push -fit joints that create a seal on the outside diameter of the tubing shall not be used with tubing that has an ethylene vinyl alcohol copolymer I (EVOH) oxygen barrier layer 1203.10 PVC plastic pipe. Joints between PVC plastic pipe and fittings shall be solvent -cemented or threaded joints con- forming to Section 1203 3 1203.11 Steel pipe. Joints between steel pipe or fittings shall be mechanical joints that are made with an approved elasto- meric seal, or shall be threaded or welded joints conform mg to Section 1203 3 1203.12 Steel tubing. Joints between steel tubing or fittings shall be mechanical or welded joints conforming to Section 12033 1203.13 Polypropylene (PP) plastic. Joints between PP plastic pipe and fittings shall comply with Sections 1203 13 1 and 1203 13 2 1203.13.1 Heat -fusion joints. Heat -fusion joints for poly- propylene (PP) pipe and tubing joints shall be installed with socket -type heat -fused polypropylene fittings, elec- tro-fasion polypropylene fittings or by butt fusion Joint surfaces shall be clean and free from moisture The joint shall be undisturbed until cool Joints shall be made in accordance with ASTM F2389 1203.13.2 Mechanical and compression sleeve joints. Mechanical and compression sleeve joints shall be installed in accordance with the manufacturer's mstruc- tions 1203.14 Raised temperature polyethylene (PE-RT) plastic tubing. Joints between raised temperature polyethylene tub- ing and fittings shall conform to Sections 1203 14 1 through I 1203 14 3 Mechanical joints shall conform to Section 12033 1203.14.1 Compression -type fittings. Where compres- sion -type fittings include inserts and ferrules or 0-rings, the fittings shall be installed without omitting the inserts and ferrules or 0-rings 1203.14.2 PE-RT-to-metal connections. Solder joints in a metal pipe shall not occur within 18 inches (457 mm) of a transition from such metal pipe to PE-RT pipe 1203.14.3 Push -fit joints. Push-fitloints that create a seal on the outside diameter of the tubing shall not be used I with tubing that has an ethylene vinyl alcohol copolymer (EVOH) oxygen barrier layer 1203.15 Polyethylene/aluminum/polyethylene (PE -AL - PE) pressure pipe. Joints between polyethylene/aluminum/ polyethylene pressure pipe and fittings shall conform to Sec- tions 1203 15 1 and 1203 15 2 Mechanical joints shall com- ply with Section 1203 3 1203.15.1 Compression -type fittings. Where compres- sion -type fittings include inserts and ferrules or 0-rings, the fittings shall be installed without omitting the inserts and ferrules or 0-rings 1203.15.2 PE -AL -PE -to -metal connections. Solder joints in a metal pipe shall not occur within 18 inches (457 mm) of a transition from such metal pipe to PE -AL -PE pipe 2018 INTERNAT10NAL MECHANICAL CODE® 115 I 1 1 1 CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.ia Affiee^®,AOICC Nof th,,e,od�oo.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER HYDRONIC PIPING 1203.16 Cross -linked polyethylene/aluminum/cross- linked polyethylene (PEX-AL-PEX) pressure pipe. Joints between cross -linked polyethylene/aluminum/cross-linked polyethylene pressure pipe and fittings shall conform to Sec- tions 1203 16 1 and 1203 16 2 Mechanical joints shall com- ply with Section 1203 3 1203.16.1 Compression -type fittings. Where compres- sion -type fittings include inserts and ferrules or O-rmgs, the fittings shall be installed without omitting the inserts and ferrules or O-rings 1203.16.2 PEX-AL-PEX-to-metal connections. Solder joints in a metal pipe shall not occur within 18 inches (457 mm) of a transition from such metal pipe to PEX-AL-PEX pipe SECTION 1204 PIPE INSULATION 1204.1 Insulation characteristics. Pipe insulation installed in buildings shall conform to the requirements of the Interna- tional Energy Conservation Code, shall be tested in accor- dance with ASTM E84 or UL 723, using the specimen preparation and mounting procedures of ASTM E2231, and shall have a maximum flame spread index of 25 and a smoke - developed index not exceeding 450 Insulation installed in an au plenum shall comply with Section 602 2 1 Exception: The maximum flame spread index and smoke - developed index shall not apply to one- and two-family dwellings 1204.2 Required thickness. Hydronic piping shall be insu- lated to the thickness required by the International Energy Conservation Code. SECTION 1205 VALVES 1205.1 Where required. Shutoff valves shall be installed in hydronic piping systems in the locations indicated in Sections 1205 1 1 through 1205 1 6 1205.1.1 Heat exchangers. Shutoff valves shall be installed on the supply and return side of a heat exchanger Exception: Shutoff valves shall not be required where heat exchangers are integral with a boiler, or are a com- ponent of a manufacturer's boiler and heat exchanger packaged unit and are capable of being isolated from the hydronic system by the supply and return valves required by Section 1005 1 1205.1.2 Central systems. Shutoff valves shall be installed on the building supply and return of a central util- ity system 1205.1.3 Pressure vessels. Shutoff valves shall be installed on the connection to any pressure vessel 1205.1.4 Pressure -reducing valves. Shutoff valves shall be installed on both sides of a pressure -reducing valve 1205.1.5 Equipment and appliances. Shutoff valves shall be installed on connections to mechanical equipment and appliances This requirement does not apply to com- ponents of a hydronic system such as pumps, air separa- tors, metering devices and similar equipment 1205.1.6 Expansion tanks. Shutoff valves shall be installed at connections to nondiaphragm-type expansion tanks 1205.2 Reduced pressure. A pressure relief valve shall be installed on the low-pressure side of a hydromc piping system that has been reduced in pressure The relief valve shall be set at the maximum pressure of the system design The valve shall be installed in accordance with Section 1006 SECTION 1206 PIPING INSTALLATION 1206.1 General. Piping, valves, fittings and connections shall be installed in accordance with the conditions of approval 1206.2 System drain down. Hydronic piping systems shall be designed and installed to permit the system to be drained Where the system drams to the plumbing drainage system, the installation shall conform to the requirements of the Inter- national Plumbing Code Exception: The buried portions of systems embedded underground or under floors 1206.3 Protection of potable water. The potable water sys- tem shall be protected from backflow in accordance with the International Plumbing Code 1206.4 Pipe penetrations. Openings for pipe penetrations in walls, floors or ceilings shall be larger than the penetrating pipe Openings through concrete or masonry building ele- ments shall be sleeved The annular space surrounding pipe penetrations shall be protected in accordance with the Inter- national Building Code 1206.5 Clearance to combustibles. A pipe in a hydronic pip- ing system in which the exterior temperature exceeds 250°F (121°C) shall have a minimum clearance of 1 inch (25 mm) to combustible materials 1206.6 Contact with building material. A hydronic piping system shall not be in direct contact with building materials that cause the piping material to degrade or corrode, or that interfere with the operation of the system 1206.7 Water hammer. The flow velocity of the hydronic piping system shall be controlled to reduce the possibility of water hammer Where a quick -closing valve creates water hammer, an approved water -hammer arrestor shall be installed The arrestor shall be located within a range as spec- ified by the manufacturer of the quick -closing valve 1206.8 Steam piping pitch. Steam piping shall be installed to dram to the boiler or the steam trap Steam systems shall not have drip pockets that reduce the capacity of the steam Piping 116 2018 INTERNATIONAL MECHANICAL CODE® Fk ff.,( 1 I CopyaghtOoz0ly ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto I RR I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER HYDRONIC PIPING 1206.9 Strains and stresses. Piping shall be installed so as to prevent detrimental strains and stresses in the pipe Provi- sions shall be made to protect piping from damage resulting from expansion, contraction and structural settlement Piping shall be installed so as to avoid structural stresses or strains within building components 1206.9.1 Flood hazard. Piping located in a flood hazard area shall be capable of resisting hydrostatic and hydrody- namic loads and stresses, including the effects of buoy- ancy, during the occurrence of flooding to the design flood elevation 1206.10 Pipe support. Pipe shall be supported in accordance with Section 305 1206.11 Condensation. Provisions shall be made to prevent the formation of condensation on the exterior of piping SECTION 1207 TRANSFER FLUID 1207.1 Flash point. The flash point of transfer fluid in a hydronic piping system shall be not less than 50°F (28°C) above the maximum system operating temperature 1207.2 Makeup water. The transfer fluid shall be compatible with the makeup water supplied to the system SECTION 1208 TESTS 1208.1 General. Hydronic piping systems shall be tested hydrostatically at one and one-half tunes the maximum sys- tem design pressure, but not less than 100 psi (689 kPa) The duration of each test shall be not less than 15 minutes Exception: For PEX piping systems, testing with a com- pressed gas shall be an alternative to hydrostatic testing where compressed air or other gas pressure testing is spe- cifically authorized by all of the manufacturers' instruc- tions for the PEX pipe and fitting products installed at the time the system is being tested, and compressed air or other gas testing is not otherwise prohibited by applicable codes, laws or regulations outside of this code SECTION 1209 EMBEDDED PIPING 1209.1 Materials. Piping for heating panels shall be stan- dard -weight steel pipe, Type L copper tubing, polybutylene or other approved plastic pipe or tubing rated at 100 psi (689 kPa) at 180°F (82°C) 1209.2 Pressurizing during installation. Piping to be embedded in concrete shall be pressure tested prior to pour - mg concrete During pouring, the pipe shall be maintained at the proposed operating pressure 1209.3 Embedded joints. Joints of pipe or tubing that are embedded in a portion of the building, such as concrete or plaster, shall be in accordance with the requirements of Sec- tions 1209 3 1 through 1209 3 5 1209.3.1 Steel pipe joints. Steel pipe shall be welded by electrical are or oxygen/acetylene method 1209.3.2 Copper tubing joints. Copper tubing shall be joined by brazing complying with Section 1203 3 1 1209.3.3 Polybutylene joints. Polybutylene pipe and tub- ing shall be installed in continuous lengths or shall be joined by heat fusion in accordance with Section 1203 8 1 1209.3.4 Polyethylene of raised temperature (PE-RT) joints. PE-RT tubing shall be installed in continuous lengths or shall be joined by hydromc fittings listed in Table 1202 5 1209.3.5 Cross -linked polyethylene (PEX) joints. PEX tubing shall be installed in continuous lengths or shall be joined by hydronic fittings listed in Table 1202 5 1209.4 Not embedded related piping. Joints of other piping in cavities or running exposed shall be joined by approved methods in accordance with manufacturer's installation instructions and related sections of this code 1209.5 Thermal barrier required. Radiant floor heating systems shall be provided with a thermal barrier in accor- dance with Sections 1209 5 1 and 1209 5 2 Insulation R-val- ues for slab -on -grade and suspended floor installation shall be in accordance with the International Energy Conservation Code Exception: Insulation shall not be required in engineered systems where it can be demonstrated that the insulation will decrease the efficiency or have a negative effect on the installation 1209.5.1 Thermal break required. A thermal break shall be provided consisting of asphalt expansion j oint materials or similar insulating materials at a point where a heated slab meets a foundation wall or other conductive slab 1209.5.2 Thermal barrier material marking. Insulating materials utilized in thermal barriers shall be installed such that the manufacturer's R-value mark is readily observable upon inspection SECTION 1210 PLASTIC PIPE GROUND -SOURCE HEAT PUMP LOOP SYSTEMS 1210.1 Ground -source heat pump -loop water piping. Ground -source heat pump ground -loop piping and tubing material for water -based systems shall conform to the stan- dards cited in this section 1210.2 Used materials. Reused pipe, fittings, valves, and other materials shall not be permitted in ground -source heat pump loop systems 1210.3 Material rating. Pipe and tubing shall be rated for the operating temperature and pressure of the ground -source heat pump loop system Fittings shall be suitable for the pressure 2018 INTERNAT10NAL MECHANICAL CODE® 117 I I 1 I CITFIghtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER HYDRONIC PIPING applications and recommended by the manufacturer for installation with the pipe and tubing material installed Where used underground, materials shall be suitable for burial 1210.4 Piping and tubing materials standards. Ground - source heat pump ground -loop pipe and tubing shall conform to the standards listed in Table 1210 4 1210.5 Fittings. Ground -source heat pump pipe fittings shall be approved for installation with the piping materials to be installed, shall conform to the standards listed in Table 1210 5 and, if installed underground, shall be suitable for burial 1210.6 Joints. Joints and connections shall be of an approved type Joints and connections shall be tight for the pressure of the ground -source loop system Joints used underground shall be approved for buried applications 1210.6.1 Joints between different piping materials. Joints between different piping materials shall be made with approved transition fittings 1210.6.2 Preparation of pipe ends. Pipe shall be cut square, be reamed, and be free of burrs and obstructions CPVC, PE, and PVC pipe shall be chamfered Pipe ends shall have full -bore openings and shall not be undercut 1210.6.3 Joint preparation and installation. Where required by Sections 1210 6 4 through 1210 6 8, the preparation and installation of mechanical and thermoplas- tic -welded joints shall comply with Sections 1210 6 3 1 and 1210632 1210.6.3.1 Mechanical joints. Mechanical joints shall be installed in accordance with the manufacturer's instructions 1210.6.3.2 Thermoplastic -welded joints. Joint sur- faces for thennoplastle-welded joints shall be cleaned by an approved procedure Joints shall be welded in accor- dance with the manufacturer's instructions 1210.6.4 CPVC plastic pipe. Joints between CPVC plas- tic pipe or fittings shall be solvent -cemented or threaded joints complying with Section 1203 3 1210.6.5 Cross -linked polyethylene (PEX) plastic tub- ing. Joints between cross -linked polyethylene plastic tub- ing and fittings shall comply with Sections 1210 6 5 1 and 1210 6 5 2 Mechanical joints shall comply with Section 121063 1210.6.5.1 Compression -type fittings. Where com- pression -type fittings include inserts and ferrules or 0- rings, the fittings shall be installed without omitting the inserts and ferrules or 0-rings 1210.6.5.2 Plastic -to -metal connections. Soldering on the metal portion of the system shall be performed not less than 18 inches (457 mm) from a plastic -to -metal adapter in the same water line TABLE 1210.4 GROUND -SOURCE LOOP PIPE MATERIAL STANDARD (see Chapter 15) Chlonnatedpolyvrnyl chloride (CPVC) ASTM D2846, ASTM F441, ASTM F442 Cross -linked polyethylene (PEX) ASTM F876, CSA B137 5 Polyethylene/alummum/polyethylene (PE -AL -PE) pressure pipe ASTM F1282, CSA B1379 High -density polyethylene (HDPE) ASTM D2737, ASTM D3035, ASTM F714, AWWA C901, CSA B137 1, CSA C448, NSF 358-1 Polypropylene (PP-R) ASTM F2389, CSA B137 11, NSF 358-2 Polyvinyl chloride (PVC) ASTM D1785, ASTM D2241 Rusedtemperature polyethylene (PE-RT) ASTM F2623, ASTM F2769, CSA B137 18 TABLE 1210.5 GROUND -SOURCE LOOP PIPE FITTINGS PIPE MATERIAL STANDARD (see Chapter 15) Chlorinated polyvinyl chloride (CPVC) ASTM D2846, ASTM F437, ASTM F438, ASTM F439, CSA B 137 6 Cross -linked polyethylene (PEX) ASTM F877, ASTM F1807, ASTM F1960, ASTM F2080, ASTM F2159, ASTM F2434, CSA B137 5 Polyethylene/aluminum/polyethylene (PE -AL -PE) ASTM F1282, ASTM F2434, CSA B137 9 High Density Polyethylene (HDPE) ASTM D2683, ASTM D3261, ASTM F1055, CSA B137 1, CSA C448, NSF 358-1 Polypropylene (PP-R) ASTM F2389, CSA B 137 11, NSF 358-2 Polyvinyl chlonde (PVC) ASTM D2464, ASTM D2466, ASTM D2467, CSA B 137 2, CSA B137 3 Rased temperature polyethylene (PE-RT) ASTM D3261, ASTM F1807, ASTM F2098, ASTM F2159, ASTM F2735, ASTM F2769, CSA B 137 1, CSA B 137 18 118 2018 INTERNATIONAL MECHANICAL CODE® 1 1 1 C',F,EhtO@Z017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( 0I.i AEffi,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd ANYVNAVTHORIVED RBPROD VCIION ORDISI-IION LEA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSEAGREEMBNT.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHERBUNDER HYDRONIC PIPING 1210.6.6 Polyethylene plastic pipe and tubing for ground -source heat pump loop systems. Joints between polyethylene plastic pipe and tubing or fittings for ground - source heat pump loop systems shall be heat -fusion joints complying with Section 1210 6 6 1, electrofusion joints complying with Section 1210 6 6 2, or stab -type insertion joints complying with Section 1210 6 6 3 1210.6.6.1 Heat -fusion joints. Joints shall be of the socket -fusion, saddle -fusion or butt -fusion type, joined in accordance with ASTM D2657 Joint surfaces shall be clean and free from moisture Joint surfaces shall be heated to melt temperatures and joined The joint shall be undisturbed until cool Fittings shall be manufac- tured in accordance with ASTM D2683 or ASTM D3261 1210.6.6.2 Electrofusion joints. Joints shall be of the electrofasion type Joint surfaces shall be clean and free from moisture, and scoured to expose virgin resin Joint surfaces shall be heated to melt temperatures for the period of time specified by the manufacturer The joint shall be undisturbed until cool Fittings shall be manu- factured in accordance with ASTM F 1055 1210.6.6.3 Stab -type insert fittings. Joint surfaces shall be clean and free from moisture Pipe ends shall be chamfered and inserted into the fittings to full depth Fittings shall be manufactured in accordance with ASTM F1924 1210.6.7 Polypropylene (PP) plastic. Joints between PP plastic pipe and fittings shall comply with Sections 121067 1 and 1210672 1210.6.7.1 Heat -fusion joints. Heat -fusion joints for polypropylene (PP) pipe and tubing joints shall be installed with socket -type heat -fused polypropylene fit- tings, electrofusion polypropylene fittings or by butt fusion Joint surfaces shall be clean and free from mois- ture The joint shall be undisturbed until cool Joints shall be made in accordance with ASTM F2389 1210.6.7.2 Mechanical and compression sleeve joints. Mechanical and compression sleeve joints shall be installed in accordance with the manufacturer's instructions 1210.6.8 Raised temperature polyethylene (PE-RT) plastic tubing. Joints between raised temperature polyeth- ylene tubing and fittings shall comply with Sections 1210 6 8 1 and 1210 6 8 2 Mechanical j omts shall comply with Section 1210 6 3 1210.6.8.1 Compression -type fittings. Where com- pression -type fittings include inserts and ferrules or 0- rings, the fittings shall be installed without omitting the inserts and ferrules or O-rings 1210.6.8.2 PE-RT-to-metal connections. Solderjoints in a metal pipe shall not occur within 18 inches (457 mm) of a transition from such metal pipe to PE-RT pipe 1210.6.9 PVC plastic pipe. Joints between PVC plastic pipe and fittings shall be solvent -cemented or threaded joints comply with Section 1203 3 1210.7 Shutoff valves. Shutoff valves shall be installed in ground -source loop piping systems in the locations indicated in Sections 1210 7 1 through 1210 7 7 1210.7.1 Heat exchangers. Shutoff valves shall be installed on the supply and return side of a heat exchanger Exception: Shutoff valves shall not be required where heat exchangers are integral with a boiler or are a com- ponent of a manufacturer's boiler and heat exchanger packaged unit and are capable of being isolated from the hydronic system by the supply and return valves re- quired by Section 1005 1 1210.7.2 Central systems. Shutoff valves shall be installed on the building supply and return of a central util- ity system 1210.7.3 Pressure vessels. Shutoff valves shall be installed on the connection to any pressure vessel 1210.7.4 Pressure -reducing valves. Shutoff valves shall be installed on both sides of a pressure -reducing valve 1210.7.5 Equipment and appliances. Shutoff valves shall be installed on connections to mechanical equipment and appliances This requirement does not apply to com- ponents of a ground -source loop system such as pumps, air separators, metering devices, and similar equipment 1210.7.6 Expansion tanks. Shutoff valves shall be installed at connections to nondiaphragm-type expansion tanks 1210.7.7 Reduced pressure. A pressure relief valve shall be installed on the low-pressure side of a hydronic piping system that has been reduced in pressure The relief valve shall be set at the maximum pressure of the system design The valve shall be installed in accordance with Section 1006 1210.8 Installation. Piping, valves, fittings, and connections shall be installed in accordance with the conditions of approval 1210.8.1 Protection of potable water. Where ground - source heat pump ground -loop systems have a connection to a potable water supply, the potable water system shall be protected from backflow in accordance with the Inter- national Plumbing Code 1210.8.2 Pipe penetrations. Openings for pipe penetra- tions in walls, floors and ceilings shall be larger than the penetrating pipe Openings through concrete or masonry building elements shall be sleeved The annular space sur- rounding pipe penetrations shall be protected in accor- dance with the International Building Code 1210.8.3 Clearance from combustibles. A pipe in a ground -source heat pump piping system having an exterior surface temperature exceeding 250°F (121°C) shall have a minimum clearance of 1 inch (25 mm) from combustible materials 2018 INTERNAT10NAL MECHANICAL CODE® 119 I 1 1 1 CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER HYDRONIC PIPING 1210.8.4 Contact with building material. A ground - source heat pump ground -loop piping system shall not be in direct contact with building materials that cause the pip- ing or fitting material to degrade or corrode, or that inter- fere with the operation of the system 1210.8.5 Strains and stresses. Piping shall be installed so as to prevent detrimental strains and stresses in the pipe Provisions shall be made to protect piping from damage resulting from expansion, contraction and structural settle- ment Piping shall be installed so as to avoid structural stresses or strains within building components 1210.8.6 Flood hazard. Piping located in a flood hazard area shall be capable of resisting hydrostatic and hydrody- namic loads and stresses, including the effects of buoy- ancy, during the occurrence of flooding to the design flood elevation 1210.8.7 Pipe support. Pipe shall be supported in accor- dance with Section 305 1210.8.8 Velocities. Ground -source heat pump ground - loop systems shall be designed so that the flow velocities do not exceed the maximum flow velocity recommended by the pipe and fittings manufacturer and shall be con- trolled to reduce the possibility of water hammer 1210.8.9 Labeling and marking. Ground -source heat pump ground -loop system piping shall be marked with tape, metal tags or other method where it enters a building indicating "GROUND -SOURCE HEAT PUMP LOOP SYSTEM" The marking shall indicate any antifreeze used in the system by name and concentration 1210.8.10 Chemical compatibility. Antifreeze and other materials used in the system shall be chemically compati- ble with the pipe, tubing, fittings, and mechanical systems 1210.9 Makeup water. The transfer fluid shall be compatible with the makeup water supplied to the system 1210.10 Tests. Before connection header trenches are back - filled, the assembled loop system shall be pressure tested with water at 100 psi (689 kPa) for 15 minutes, in which time there shall not be observed leaks Flow and pressure loss testing shall be performed and the actual flow rates and pressure drops shall be compared to the calculated design values If actual flow rate or pressure drop values differ from calculated design values by more than 10 percent, the cause shall be identified and corrective action taken 1210.11 Embedded piping. Ground -source heat pump ground -loop piping to be embedded in concrete shall be pres- sure tested prior to pouring concrete During pouring, the pipe shall be maintained at the proposed operating pressure 120 2018 INTERNATIONAL MECHANICAL CODE® 11 1 Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 13 FUEL OIL PIPING AND STORAGE User note: About this chapter., Chapter 13 is devoted to fuel oil piping and fuel oil storage related to heating appliances, power generators and similar equipmentlappliances. The requirements focus on preventing fuel leaks and equipment failures that could result in severe fire hazards. SECTION 1301 GENERAL 1301.1 Scope. This chapter shall govern the design, installa- tion, construction and repair of fuel -oil storage and piping systems The storage of fuel oil and flammable and combusti- ble liquids shall be in accordance with Chapters 6 and 57 of the International Fire Code 1301.2 Storage and piping systems. Fuel -oil storage sys- tems shall comply with Section 603 3 of the International Fire Code Fuel -oil piping systems shall comply with the requirements of this code 1301.3 Fuel type. An appliance shall be designed for use with the type of fuel to which it will be connected Such appliance shall not be converted from the fuel specified on the rating plate for use with a different fuel without securing reapproval from the code official 1301.4 Fuel tanks, piping and valves. The tank, piping and valves for appliances burning oil shall be installed in accor- dance with the requirements of this chapter Where an oil burner is served by a tank, any part of which is above the level of the burner inlet connection and where the fuel supply line is taken from the top of the tank, an approved antisiphon valve or other siphon-breakmg device shall be installed in lieu of the shutoff valve 1301.5 Tanks abandoned or removed. All exterior above - grade fill piping shall be removed when tanks are abandoned or removed Tank abandonment and removal shall be in accordance with Section 5704 2 13 of the International Fire Code. SECTION 1302 MATERIAL 1302.1 General. Piping materials shall conform to the stan- dards cited in this section 1302.2 Rated for system. All materials shall be rated for the operating temperatures and pressures of the system, and shall be compatible with the type of liquid 1302.3 Pipe standards. Fuel oil pipe shall comply with one of the standards listed in Table 1302 3 1302.4 Nonmetallic pipe. Nonmetallic pipe shall be listed and labeled as being acceptable for the intended application for flammable and combustible liquids Nonmetallic pipe shall be installed only outdoors, underground TABLE 1302.3 FUEL OIL PIPING MATERIAL STANDARD (see Chapter 15) Copper or copper -alloy pipe ASTM B42, ASTM B43, ASTM B302 Copper or copper -alloy tubing (Type K, L or M) ASTM B75, ASTM B88, ASTM B280, ASME B16 51 Labeled pipe (See Section 1302 4) Nonmetallic pipe ASTM D2996 Steel pipe ASTM A53, ASTM At 06 Steel tubing ASTM A254, ASTM A539 1302.5 Fittings and valves. Fittings and valves shall be approved for the piping systems, and shall be compatible with, or shall be of the same material as, the pipe or tubing 1302.6 Bending of pipe. Pipe shall be approved for bending Pipe bends shall be made with approved equipment The bend shall not exceed the structural limitations of the pipe 1302.7 Pumps. Pumps that are not part of an appliance shall be of a positive -displacement type The pump shall automati- cally shut off the supply when not in operation Pumps shall be listed and labeled in accordance with UL 343 1302.8 Flexible connectors and hoses. Flexible connectors and hoses shall be listed and labeled in accordance with UL 536 SECTION 1303 JOINTS AND CONNECTIONS 1303.1 Approval. Joints and connections shall be approved and of a type approved for fuel -oil piping systems Threaded joints and connections shall be made tight with suitable lubri- cant or pipe compound Unions requiring gaskets or pack- ings, right or left couplings, and sweat fittings employing solder having a melting point of less than 1,000°F (538°C) shall not be used in oil lines Cast-iron fittings shall not be used Joints and connections shall be tight for the pressure required by test 1303.1.1 Joints between different piping materials. Joints between different piping materials shall be made with approved adapter fittings Joints between different metallic piping materials shall be made with approved dielectric fittings or copper -alloy converter fittings 1303.2 Preparation of pipe ends. Pipe shall be cut square, reamed and chamfered and be free from all burrs and obstruc- 2018 INTERNATIONAL MECHANICAL CODE® 121 I I 1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dv od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)pu, tto ( I.i Ag,, ^®,AOICC Nof th,,e,od�oamfw ,,e od�o¢tbyany ,dPartyo, AMb�tmPOo�vs3 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢e3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER FUEL OIL PIPING AND STORAGE E* tions Pipe ends shall have full -bore openings and shall not be undercut 1303.3 Joint preparation and installation. Where required by Sections 1303 4 through 1303 9, the preparation and installation of brazed, mechanical, threaded and weldedjomts shall comply with Sections 1303 3 1 through 1303 3 4 1303.3.1 Brazed joints. All joint surfaces shall be cleaned An approved flux shall be applied where required The joints shall be brazed with a filler metal con- form mg to AWS A5 8 1303.3.2 Mechanical joints. Mechanical joints shall be installed in accordance with the manufacturer's instruc- tions Press -connect joints shall conform to one of the standards listed in Table 1302 3 1303.3.3 Threaded joints. Threads shall conform to ASME Bl 201 Pipe -joint compound or tape shall be applied on the male threads only 1303.3.4 Welded joints. All joint surfaces shall be cleaned by an approved procedure The joint shall be welded with an approved filler metal 1303.4 Copper or copper -alloy pipe. Joints between copper or copper -alloy pipe or fittings shall be brazed, mechanical, threaded or welded joints complying with Section 1303 3 1303.5 Copper or copper -alloy tubing. Joints between cop- per or copper -alloy tubing or fittings shall be brazed, mechan- ical joints complying with Section 1303 3, press -connect joints that conform to one of the standards in Table 1302 3 or flared joints Flared joints shall be made by a tool designed for that operation 1303.6 Nonmetallic pipe. Joints between nonmetallic pipe or fittings shall be installed in accordance with the manufac- turer's instructions for the labeled pipe and fittings 1303.7 Steel pipe. Joints between steel pipe or fittings shall be threaded or welded joints complying with Section 1303 3 or mechanical joints complying with Section 1303 7 1 1303.7.1 Mechanical joints. Joints shall be made with an approved elastomeric seal Mechanical joints shall be installed in accordance with the manufacturer's instruc- tions Mechanical joints shall be installed outdoors, under- ground, unless otherwise approved 1303.8 Steel tubing. Joints between steel tubing or fittings shall be mechanical or welded joints complying with Section 13033 1303.9 Piping protection. Proper allowance shall be made for expansion, contraction, jarring and vibration Piping other than tubing, connected to underground tanks, except straight fill lines and test wells, shall be provided with flexible con- nectors, or otherwise arranged to permit the tanks to settle without impairing the tightness of the piping connections SECTION 1304 PIPING SUPPORT 1304.1 General. Pipe supports shall be in accordance with Section305 SECTION 1305 FUEL OIL SYSTEM INSTALLATION 1305.1 Size. The fuel oil system shall be sized for the maxi- mum capacity of fuel oil required The minimum size of a supply line shall be'/g inch (9 5 mm) inside diameter nominal pipe or'/g inch (9 5 mm) outside diameter tubing The mim- mum size of a return line shall be '/q inch (6 4 mm) inside diameter nominal pipe or s/6 inch (7 9 mm) outside diameter tubing Copper tubing shall have 0 035-inch (0 9 mm) nomi- nal and 0 032-mch (0 8 mm) minimum wall thickness 1305.2 Protection of pipe, equipment and appliances. Fuel oil pipe, equipment and appliances shall be protected from physical damage 1305.2.1 Flood hazard. Fuel oil pipe, equipment and appliances located in flood hazard areas shall be located above the elevation required by Section 1612 of the Inter- national Building Code for utilities and attendant equip- ment or shall be capable of resisting hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding up to such elevation 1305.3 Supply piping. Supply piping shall connect to the top of the fuel oil tank Fuel oil shall be supplied by a transfer pump or automatic pump or by other approved means Exception: This section shall not apply to inside or above- ground fuel oil tanks 1305.4 Return piping. Return piping shall connect to the top of the fuel oil tank Valves shall not be installed on return Piping 1305.5 System pressure. The system shall be designed for the maximum pressure required by the fuel -oil -burning appk- ance Au or other gases shall not be used to pressurize tanks 1305.6 Fill piping. A fill pipe shall terminate outside of a building at a point not less than 2 feet (610 mm) from any building opening at the same or lower level A fill pipe shall terminate in a manner designed to minimize spilling when the filling hose is disconnected Fill opening shall be equipped with a tightmetal cover designed to discourage tampering 1305.7 Vent piping. Liquid fuel vent pipes shall terminate outside of bwldmgs at a point not less than 2 feet (610 mm) measured vertically or horizontally from any bwldmg open- ing Outer ends of vent pipes shall terminate in a weather- proof vent cap or fitting or be provided with a weatherproof hood Vent caps shall have a minimum free open area equal to the cross -sectional area of the vent pipe and shall not employ screens finer than No 4 mesh Vent pipes shall termi- nate sufficiently above the ground to avoid being obstructed with snow or ice Vent pipes from tanks containing heaters shall be extended to a location where oil vapors discharging from the vent will be readily diffused If the static head with a vent pipe filled with oil exceeds 10 pounds per square inch (psi) (69 kPa), the tank shall be designed for the maximum static head that will be imposed Liquid fuel vent pipes shall not be cross connected with fill pipes, Imes from burners or overflow lines from auxiliary tanks 122 2018 INTERNATIONAL MECHANICAL CODE® 1 I CopynEhtOoZ.0I7ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM (PST) L--tto S I ( I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER FUEL OIL PIPING AND STORAGE SECTION 1306 OIL GAUGING 1306.1 Level indication. Tanks in which a constant oil level is not maintained by an automatic pump shall be equipped with a method of determining the oil level 1306.2 Test wells. Test wells shall not be installed inside buildings For outdoor service, test wells shall be equipped with a tight metal cover designed to discourage tampering 1306.3 Inside tanks. The gauging of inside tanks by means of measuring sticks shall not be permitted An inside tank provided with fill and vent pipes shall be provided with a device to indicate either visually or audibly at the fill point when the oil in the tank has reached a predetermined safe level 1306.4 Gauging devices. Gauging devices such as liquid level indicators or signals shall be designed and installed so that oil vapor will not be discharged into a building from the liquid fuel supply system Liquid -level indicating gauges shall comply with UL 180 1306.5 Gauge glass. A tank used in connection with any oil burner shall not be equipped with a glass gauge or any gauge that, when broken, will permit the escape of oil from the tank SECTION 1307 FUEL OIL VALVES 1307.1 Building shutoff. A shutoff valve shall be installed on the fuel -oil supply line at the entrance to the building Inside or above -ground tanks are permitted to have valves installed at the tank The valve shall be capable of stopping the flow of fuel oil to the building or to the appliance served where the valve is installed at a tank inside the building Valves shall comply with UL 842 1307.2 Appliance shutoff. A shutoff valve shall be installed at the connection to each appliance where more than one fuel-oJl-burning appliance is installed 1307.3 Pump relief valve. A relief valve shall be installed on the pump discharge line where a valve is located downstream of the pump and the pump is capable of exceeding the pres- sure limitations of the fuel oil system 1307.4 Fuel -oil heater relief valve. A relief valve shall be installed on the discharge line of fuel-oJl-heating appliances 1307.5 Relief valve operation. The relief valve shall dis- charge fuel oil when the pressure exceeds the limitations of the system The discharge line shall connect to the fuel oil tank SECTION 1308 TESTING 1308.1 Testing required. Fuel oil piping shall be tested in accordance with NFPA 31 2018 INTERNAT10NAL MECHANICAL CODE® 123 I I 1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb,t—thod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 124 2018 INTERNATIONAL MECHANICAL CODE® Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGRE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 14 SOLAR THERMAL SYSTEMS User note: About this chapter., Chapter 14 addresses solar thermalsystems, notphotovoltaic systems. The provisions are intended to protectproperty and life from the hazards associated with high -temperature liquids, pressurized systems and toxic fluids. There are also provisions to protect the building structure and the solar thermal system components from damage. SECTION 1401 GENERAL 1401.1 Scope. This chapter shall govern the design, construc- tion, installation, alteration and repair of solar thermal sys- tems, equipment and appliances intended to utilize solar energy for space heating or cooling, domestic hot water heat - mg, swimming pool heating or process heating 1401.2 Potable water supply. Potable water supplies to solar systems shall be protected against contamination in accor- dance with the International Plumbing Code Exception: Where all solar system piping is a part of the potable water distribution system, in accordance with the requirements of the International Plumbing Code, and all components of the piping system are listed for potable water use, cross -connection protection measures shall not be required 1401.3 Heat exchangers. Heat exchangers used in domestic water -heating systems shall be approved for the intended use The system shall have adequate protection to ensure that the potability of the water supply and distribution system is prop- erly safeguarded 1401.4 Solar thermal equipment and appliances. Solar thermal equipment and appliances shall conform to the requirements of this chapter and ICC 900/SRCC 300 Solar thermal systems shall be listed and labeled in accordance with ICC 900/SRCC 300 and shall be installed in accordance with the manufacturer's instructions and ICC 900/SRCC 300 1401.4.1 Collectors and panels. Solar thermal collectors and panels shall be listed and labeled in accordance with ICC 901/SRCC 100 SECTION 1402 DESIGN AND INSTALLATION 1402.1 General. The design and installation of solar thermal systems shall comply with Sections 1402 1 through 1402 8 Solar thermal systems shall be listed and labeled in accor- dance with ICC 900/SRCC 300 and shall be installed in accordance with the manufacturer's instructions and ICC 900/SRCC 300 1402.2 Access. Access shall be provided to solar thermal equipment for maintenance Solar thermal systems and appurtenances shall not obstruct or interfere with the opera- tion of any doors, windows or other building components requiring operation or access Roof -mounted solar thermal equipment shall not obstruct or interfere with the operation of roof -mounted equipment, appliances, clumneys, roof hatches, smoke vents, skylights and other roof penetrations and open- ings 1402.3 Pressure and temperature. Solar thermal system components containing pressurized fluids shall be protected against pressures and temperatures exceeding design limita- tions with pressure and temperature relief valves or pressure relief valves System components shall have a working pres- sure rating of not less than the setting of the pressure relief device 1402.3.1 Relief device. Each section of the system in which excessive pressures are capable of developing shall have a relief device located so that a section cannot be valved off or otherwise isolated from a relief device Relief valves shall comply with the requirements of Sec- tion 1006 6 For indirect solar systems, pressure relief valves in solar loops shall also comply with ICC 900/ SRCC 300 1402.3.2 Vacuum. System components that might be sub- jected to a vacuum while in operation or during shutdown shall be designed to withstand such vacuum or shall be protected with vacuum relief valves 1402.4 Protection from freezing. System components shall be protected from damage by freezing of heat transfer liquids at the lowest ambient temperatures that will be encountered during the operation of the system Freeze protection shall be provided in accordance with ICC 900/SRCC 300 Dram -back systems shall be installed in compliance with Section 1402 4 1 and systems utilizing freeze -protection valves shall comply with Section 1402 4 2 1402.4.1 Drain -back systems. Drain -back systems shall be designed and installed to allow for manual gravity draining of fluids from areas subject to freezing to loca- tions not subject to freezing, and air filling of the compo- nents and piping Such piping and components shall maintain a horizontal slope in the direction of flow of not less than one-fourth unit vertical in 12 units horizontal (2- percent slope) Piping and components subject to manual gravity draining shall permit subsequent air filling upon drainage and air storage or venting upon refilling 1402.4.2 Freeze -protection valves. Freeze -protection valves shall discharge in a manner that does not create a hazard or structural damage 2018 INTERNAT10NAL MECHANICAL CODE® 125 I I 1 I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST)pu,rvantto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER SOLAR THERMAL SYSTEMS 1402.5 Protection of potable water. Where a solar thermal system heats potable water to supply a potable hot water dis- tribution or any other type of heating system, the solar ther- mal system shall be in accordance with Sections 1402 5 1 through 1402 5 3 as applicable 1402.5.1 Indirect systems. Water supplies of any type shall not be connected to the solar heating loop of an indi- rect solar thermal hot water heating system This require- ment shall not prohibit the presence of inlets or outlets on the solar heating loop for the purposes of servicing the fluid in the solar heating loop 1402.5.2 Direct systems for potable water distribution systems. Where a solar thermal system directly heats pota- ble water for a potable water distribution system, the pipe, fittings, valves and other components that are in contact with the potable water in the system shall comply with the requirements of the International Plumbing Code 1402.5.3 Direct systems for other than potable water distribution systems. Where a solar thermal system directly heats water for a system other than a potable water distribution system, a potable water supply connected to such system shall be protected against backflow in accor- dance with the International Plumbing Code. 1402.6 Protection of equipment Solar thermal equipment exposed to vehicular traffic shall be installed not less than 6 feet (1829 mm) above the finished floor Exception: This section shall not apply where the equip- mentis protected from motor vehicle impact 1402.7 Protection of structure. In the process of installing or repairing any part of a solar thermal system, the building or structure shall be left in a safe structural condition in accor- dance with Sections 302, 1402 7 1 and 1402 7 2 1402.7.1 Controlling condensation. Where attics or structural spaces are part of a passive solar system, venti- lation of such spaces, as required by Section 406, is not required where other approved means of controlling con- densation are provided 1402.7.2 Penetrations. Roof and wall penetrations shall be flashed and sealed to prevent entry of water, rodents and insects in accordance with Section 302 1402.8 Equipment. The solar thermal system shall be equipped in accordance with the requirements of Sections 1402 8 1 through 1402 8 5 3 1402.8.1 Collectors and panels. Solar collectors and pan- els shall comply with Sections 1402 8 1 1 through 1402814 1402.8.1.1 Design. Solar thermal collectors and panels shall be listed and labeled in accordance with ICC 901/ SRCC 100 1402.8.1.2 Rooftop -mounted solar thermal collec- tors and systems. The roof shall be constructed to sup- port the loads imposed by roof -mounted solar collectors Where mounted on or above the roof cover - mg, the collector array and supporting construction shall be constructed of noncombustible materials or fire -retardant -treated wood conforming to the Interna- tional Building Code to the extent required for the type of roof construction of the building to which the collec- tors are accessory 1402.8.1.3 Collectors as roof covering. Roof -mounted solar collectors that also serve as a roof covering shall conform to the requirements for roof coverings in accordance with the International Building Code Exception: The use of plastic solar collector covers shall be limited to those approved light -transmitting plastics meeting the requirements for plastic roof panels in Section 2609 of the International Building Code 1402.8.1.4 Collector sensors. Collector sensor installa- tion, sensor location and the protection of exposed sen- sor wires from degradation shall be in accordance with ICC 900/SRCC 300, NFPA 70 and the collector manu- facturer's instructions 1402.8.2 Ducts. Ducts utilized in solar heating and cool- ing systems shall be constructed and installed in accor- dance with Chapter 6 1402.8.2.1 Filtering. Air transported to occupied spaces through dust -producing materials by means other than natural convection shall be filtered before entering the occupied space in accordance with Section 605 1402.8.3 Piping. Potable piping shall be installed in accor- dance with the International Plumbing Code Hydromc piping shall be installed in accordance with Chapter 10 of this code Mechanical system piping shall be supported in accordance with Section 305 1402.8.3.1 Piping insulation. Piping shall be insulated in accordance with the requirements of the Interna- tional Energy Conservation Code Exterior insulation shall be protected from degradation The entire solar loop shall be insulated Where split -style insulation is used, the seam shall be sealed Fittings shall be fully insulated Insulation shall comply with Section 1204 1 Exceptions: 1 Those portions of the piping that are used to help prevent the system from overheating shall not be required to be insulated 2 Those portions of piping that are exposed to solar radiation, made of the same material as the solar collector absorber plate and covered in the same manner as the solar collector absorber, or that are used to collect additional solar energy, shall not be required to be insu- lated 3 Piping in solar thermal systems using unglazed solar collectors to heat a swimming pool shall not be required to be insulated 1402.8.4 Heat exchangers. Heat exchangers used in domestic water -heating systems shall be approved for the intended use The system shall have adequate protection to ensure that the potability of the water supply and distribu- tion system is properly safeguarded 1402.8.4.1 Double -wall heat exchangers. Heat exchangers utilizing a non -food -grade fluid shall be 126 2018 INTERNATIONAL MECHANICAL CODE® rill 1 1 CopynEhtOoZ.0I7ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PM(PST)pu�rvantto S I ( I.i A&g,vo ,AOICC Nof th,, ,od,S,00.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER SOLAR THERMAL SYSTEMS separated from the potable water by double -wall con- struction An au gap open to the atmosphere shall be provided between the two walls The discharge location from the double -wall heat exchanger shall be visible 1402.8.4.2 Single -wall heat exchangers. Food -grade fluids shall be used as the heat transfer fluid in single - wall heat exchangers 1402.8.5 Water heaters and hot water storage tanks. Auxiliary water heaters, boilers and water storage tanks associated with solar thermal systems shall comply with Chapter 10 and ICC 900/SRCC 300 1402.8.5.1 Hot water storage tank insulation. Hot water storage tanks shall be insulated and such msula- tion shall have anR-value of not less than R-12 5 1402.8.5.2 Outdoor locations. Storage tanks and heat- ing equipment installed in outdoor locations shall be designed for outdoor installation 1402.8.5.3 Storage tank sensors. Storage tank sensors shall comply with ICC 900/SRCC 300 1402.8.6 Solar loop. Solar loops shall be in accordance with Sections 1402 8 6 1 and 1402 8 6 2 1402.8.6.1 Solar loop isolation. Valves shall be installed to allow the solar loop to be isolated from the remainder of the system 1402.8.6.2 Drain and fill valve caps. Dram caps shall be installed on dram and fill valves 1402.8.7 Expansion tanks. Liquid single-phase solar energy systems shall be equipped with expansion tanks sized in accordance with Section 1009, except that addi- tional expansion tank acceptance volume equal to the total volume of liquid contained in the installed solar collectors and piping above the collectors shall be included SECTION 1403 HEAT TRANSFER FLUIDS 1403.1 Flash point. The flash point of the heat transfer fluid utilized in a solar system shall be not less than 50°F (28°C) above the design maximum nonoperating (no -flow) tempera- ture of the fluid attained in the collector 1403.2 Heat transfer fluids. Heat transfer gases and liquids shall be rated to withstand the system's maximum design temperature under operating conditions without degradation Heat transfer fluids shall be in accordance with ICC 900/ SRCC 300 1403.3 Food -grade additives. Any food -grade fluid used as a heat transfer fluid containing additives shall be thud -party listed by an approved agency to the appropriate section of the Code of Federal Regulations, Title 21, Food and Drugs, Chapter 1, Food and Drug Administration, Parts 174-186 1403.4 Toxicity. The use of toxic fluids shall comply with Title 15 of the Federal Hazardous Substances Act and Chap- ter 60 of the Intemahonal Fire Code 1403.5 Flammable gases and liquids. A flammable liquid or gas shall not be utilized as a heat transfer fluid The flash point of liquids used in occupancies classified in Group H or F shall not be lower unless approved SECTION 1404 LABELING 1404.1 Collectors. Factory -built collectors shall bear a label showing the manufacturer's name and address, model num- ber and serial number 1404.2 Water storage tanks. Pressurized water storage tanks shall bear a label showing the manufacturer's name and address, model number, serial number, storage unit maximum and minimum allowable operating temperatures, and storage unit maximum and minimum allowable operating pressures The label shall clarify that these specifications apply only to the water storage tanks 1404.3 Fluid safety labeling. Dram and fill valves shall be labeled with a description and warning that identifies the fluid in that loop as "Potable Water," "Food -Grade Fluid," "Non -Food -Grade Fluid" or "Toxic " Labeling shall also be provided that reads as follows "Fluid could be discharged at high temperature or pressure or both Unauthorized alter- ations to this system could result in a health hazard or a haz- ardous condition " 1404.4 Heat exchangers. Heat exchangers shall be labeled to indicate the heat exchanger type with one of the following 1 "Single -wall without leak protection" 2 "Double -wall without leak protection" 3 "Double -wall with leak protection" 2018 INTERNAT10NAL MECHANICAL CODE® 127 I I 1 I CITFIEhtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL (PST) tto ( I.i Affiee^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 128 2018 INTERNATIONAL MECHANICAL CODE® Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGRE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER CHAPTER 15 REFERENCED STANDARDS User note: About this chapter. This code contains numerous references to standards that are used to provide requirements for materials and methods of construction. This chapter contains a comprehensive list of all standards that are referenced in this code. These standards, in essence, are part of this code to the extent of the reference to the standard. This chapter lists the standards that are referenced in various sections of this document The standards are listed herein by the promulgating agency of the standard, the standard identification, the effective date and title, and the section or sections of this document that reference the standard. The application of the referenced standards shall be as specified in Section 102 8. ACCAAir Conditioning Contractors of America 2800 Slurhngton Road, Suite 300 Arlington, VA 22206 Manual D-2016: Residential Duct Systems 601 4,6032 ANSI/ASHRAE/ACCA 183-2007 (reaffirmed 2014): Peak Cooling and Heating Load Calculations in Buildings Except Low-rise Residential Buildings 312 1 AHRIAu -Conditioning Healing & Refrigeration Institute 2111 Wilson Blvd, Suite 500 Arlington, VA 22201 700-2015 with Addendum 1: Specifications for Refrigerants 1102223 AMCAAir Movement and Control Association International 30 West University Drive Arlington Heights, IL 60004 230-15: Laboratory Methods of Testing Air Circulating Fans for Rating and Certification 929 1 550-09: Test Method for High Velocity Wind Driven Rain Resistant Louvers 401 5,501 32 ANSI/AMCA 210-ANSI/ASHRAE 51-07: Laboratory Methods of Testing Fans for Aerodynamic Performance Rating 403324 ANSIAmerican National Standards Institute 25 West 43rd Street, 4th Floor New York, NY 10036 Z21.1-2010: Household Cooking Gas Appliances 5052 Z21.8-1994 (R2002): Installation of Domestic Gas Conversion Burners 919 1 2018 INTERNATIONAL MECHANICAL CODE® 129 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED A--dby HDOP, Van Cm, rhv dmep -d—od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PAL (PST)p--tto ( I.—A,e^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMb�tmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFERENCED STANDARDS ASHRAE ASHRAE 1791 Tulhe Circle NE Atlanta, GA 30329 ANSFAMCA 210—ANSI/ASHRAE 51-07: Laboratory Methods of Testing Fans for Aerodynamic Performance Rating 403324 ASHRAE2017 ASHRAE Fundamentals Handbook 6032 15-2016: Safety Standard for Refrigeration Systems 1101 6, 1105 8,1108 1 34-2016: Designation and Safety Classification of Refrigerants 202, 1102 2 1, 1103 1 62.1-2016: Ventilation for Acceptable Indoor Air Quality 403311232 170-2017: Ventilation of Health Care Facilities 407 150-2012: Standard Practice for Inspection and Maintenance of Commercial Building HVAC Systems 1023 ASMEAmerican Society of Mechanical Engineers Two Park Avenue New York, NY 10016-5990 A112.4.1-2009: Water Heater Relief Valve Drain Tubes 10066 B1.20.1-2013: Pipe Threads, General Purpose (Inch) 1203 3 5, 1303 3 3 B16.3-2016: Malleable Iron Threaded Fittings, Classes 150 & 300 Table 1202 5 B16.5-2015: Pipe Flanges and Flanged FittingsNPS'/i through NPS 24 Table 1202 5 B16.9-2012: Factory Made Wrought Steel Buttwelding Fittings Table 1202 5 B16.11-2016: Forged Fittings, Socket -welding and Threaded Table 1202 5 B16.15-2013: Cast Alloy Threaded Fittings: Classes 125 and 250 Table 1202 5 B16.18-2012: Cast Copper Alloy Solder Joint Pressure Fittings 513 13 1, Table 1202 5 B16.22-2013: Wrought Copper and Copper Alloy Solder Joint Pressure Fittings 513 13 1, Table 1202 5 B16.24-2016: Cast Copper Alloy Pipe Flanges and Flanged Fittings: Class 150, 300, 400, 600, 900, 1500 and 2500 Table 1202 5 B16.26-2016: Cast Copper Alloy Fittings for Flared Copper Tubes Table 1202 5 B16.28-1994: Wrought Steel Buttwelding Short Radius Elbows and Returns Table 1202 5 B16.51-2013: Copper and Copper Alloy Press -connect Pressure Fittings Table 1202 5 B31.5-2016: Refrigeration Piping and Heat Transfer Components 11071 B31.9-2014: Building Services Piping 1201 3 130 2018 INTERNAT10NAL MECHANICAL CODE® firill ' Clp lght@@2017ICC ALL RIGHTS RESERVED A--dby HDOP, Cm Cm, (hv dmep -d—od mm).(CLAdR—d—od)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) T-mmtto S I ( I.—Agffi,—o ,AOICC Nofi th,, ,od,S,o,,,o u ,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢e3 ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER REFERENCED STANDARDS ASME—continued BPVC-2015: ASME Boiler & Pressure Vessel Code-07 Edition 1009 2,1003 1, 1004 1, 1011 1 CSD-1-2016: Controls and Safety Devices for Automatically Fired Boilers 1004 1 ASSEAmerican Society of Safety Engineers 520 N Northwest Highway Park Ridge, IL 60068 ANSI/ASSE Z359.1-2016: Requirements for ANSUASSE Z359 Fall Protection Code 304 11 ASSE ASSE International 18927 Hickory Creek Drive, Smte 220 Mokena, IL 60448 1017-2010: Performance Requirements for Temperature Actuated Mining Values for Hot Water Distribution Systems 100222 1061-2015: Performance Requirements for Push Fit Fittings Table 1202 5 AS 1T M ASTM International 100 Barr Harbor Drive, P O Box C700 West Conshohocken, PA 19428 A53/A53M-12: Specification for Pipe, Steel, Black and Hot -dipped, Zinc -coated, Welded and Seamless Table 1202 4, Table 1202 5, Table 1302 3 A106/A106M-14: Specification for Seamless Carbon Steel Pipe for High -temperature Service Table 1302 3, Table 1202 5, Table 1202 4 Table 1302 3 A126-04(2014): Specification for Gray Iron Castings for Valves, Flanges and Pipe Fittings Table 1202 5 A234/A234M-15: Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service Table 1202 5 A254-12: Specification for Copper Brazed Steel Tubing Table 1202 4, Table 1302 3 A395/A395M-99(2014): Standard Specification for Ferritic Ductile Iron Pressure -retaining Castings for Use at Elevated Temperatures Table 1202 5, Table 1302 3 A420/A420M-14: Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low -temperature Service Table 1202 5 A536-84(2014): Standard Specification for Ductile Iron Castings Table 1202 5 A539-99: Specification for Electric -resistance -welded Coiled Steel Tubing for Gas and Fuel Oil Lines Table 1302 3 B32-08(2014): Specification for Solder Metal 120333 B42-15a: Specification for Seamless Copper Pipe, Standard Sizes 513 13 1, 1107 5 2, Table 1202 4, Table 1302 3 B43-15: Specification for Seamless Red Brass Pipe, Standard Sizes 513 13 1, 1107 5 2, Table 1202 4, Table 1302 3 B68/B58M-11: Specification for Seamless Copper Tube, Bright Annealed 513 131 B75/B75M-11: Specification for Seamless Copper Tube Table 1302 3 2018 INTERNATIONAL MECHANICAL CODE® 131 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED A--dby HDOP, Van Cm,(hv dmep -dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PAL(PST) T--tto ( I.—Ag,,—o ,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFERENCED STANDARDS ASTM—continued B88-14: Specification for Seamless Copper Water Tube 513 13 1, 1107 5 3, Table 1202 4, Table 1302 3 B135-10: Specification for Seamless Brass Tube Table 1202 4 B251-10: Specification for General Requirements for W rought Seamless Copper and Copper -alloy Tube 513 13 1, Table 1202 4 B280-13: Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service 513 13 1, 1107 5 3, Table 1302 3 B302-12: Specification for Threadless Copper Pipe, Standard Sizes Table 1202 4, Table 1302 3 B813-10: Specification for Liquid and Paste Fluxes for Soldering of Copper and Copper Alloy Tube 120333 B819-00(R2011): Standard Specification for Seamless Copper Tube for Medical Gas Systems 110753 B828-02(2010): Practice for Malting Capillary Joints by Soldering of Copper and Copper Alloy Tube and Fittings 120333 C315-07(2011): Specification for Clay Flue Liners and Chimney Pots 801 16 1, Table 803 10 4 C411-11: Test Method for Hot -surface Performance of High -temperature Thermal Insulation 6043 D56-05(2010): Test Method for Flash Point by Tag Closed Cup Tester 202 D93-15: Test Method for Flash Point of Pensky-Martens Closed Cup Tester 202 D1527-99(2005): Specification for Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe, Schedules 40 and 80 Table 1202 4 D1693-15: Test Method for Environmental Stress -cracking of Ethylene Plastics Table 1202 4 D1785-15: Specification for Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80 and 120 Table 1202 4, Table 1210 4 D2235-04(2011): Specifications for Solvent Cement for Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe and Fittings 120334 D2241-15: Specification for Poly (Vinyl Chloride) (PVC) Pressure -rated Pipe (SDR-Series) Table 1202 4, Table 1210 4 D2282-99(2005): Specification for Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe (SDR-PR) Table 1202 4 D2412-11: Test Method for Determination of External Loading Characteristics of Plastic Pipe by Parallel -plate Loading 60383 D2464-15: Standard Specification for Threaded Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80 Table 1210 5 D2466-15: Specification for Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 Table 1202 5, Table 1210 5 D2467-15: Specification for Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80 Table 1202 5, Table 1210 5 D2564-12: Specification for Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems 120334 D2657--07: Standard Practice for Heat Fusion Joining of Polyolefin Pipe and Fittings Table 1210 5 D2683-14: Specification for Socket -type Polyethylene Fittings for Outside Diameter -controlled Polyethylene Pipe and Tubing Table 1210 5, 1210 6 6 1 D2737-12a: Standard Specification for Polyethylene (PE) Plastic Tubing Table 1210 4 132 2018 INTERNAT10NAL MECHANICAL CODE® firill ' CopyaghtOoz0ly ICC ALL RIGHTS RESERVED A--dby HDOP, Cm Cm, (hv dmep -dwood mm).(CLAdR—d—od)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) T-mmtto S I ( I.—Agffi,—o ,AOICC Nofi th,, ,od,S,o,,,o u ,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢e3 ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER REFERENCED STANDARDS ASTM—continued D2846/D2846M-14: Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Hot and Cold -water Distribution Systems Table 1202 4, 1203 3 4, Table 1210 4 D2996-01(2007)e01: Specification for Filament -wound Fiberglass (Glass Fiber Reinforced Thermosetting Resin) Pipe Table 1302 3 D3035-15: Specification for Polyethylene (PE) Plastic Pipe (DR -PR) Based on Controlled Outside Diameter Table 1210 4 D3261-12e1: Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing Table 1210 5, 1210 6 6 1 D3278-96(2011): Test Methods for Flash Point of Liquids by Small Scale Closed -cup Apparatus 202 D3309-96a(2002): Specification for Polybutylene (PB) Plastic Hot and Cold -water Distribution Systems Table 1202 4, 1203 10 1 E84-2016: Standard Test Method for Surface Burning Characteristics of Building Materials 202, 510 9, 602 2, 602 2 1, 602 2 1 6, 602 2 1 6 1, 602 2 1 6 2, 602 2 16 3, 602 2 17, 604 3, 1204 1 E119-2016: Test Method for Fire Tests of Building Construction and Materials 607 5 2, 607 5 5, 607 6 1, 607 2 1 E136-16: Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 Degrees C 202 E814-13a: Standard Test Method for Fire Tests of Penetration Firestop Systems 506 3 11 2, 506 3 11 3 E1509-12: Specification for Room Heaters, Pellet Fuel -burning Type 904 1 E2231-15: Standard Practice for Specimen Preparation and Mounting of Pipe and Duct Insulation Materials to Assess Surface Burning Characteristics 6043, 1204 1 E2336-16: Standard Test Methods for Fire Resistive Grease Duct Enclosure Systems 506 3 6, 506 3 11 2 F437-15: Specification for Threaded Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80 Table 1210 5 F438-15: Specification for Socket Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 40 Table 1202 5, Table 1210 5 F439-13: Specification for Socket Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80 Table 1202 5, Table 1210 5 F441/F441M-15: Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe, Schedules 40 and 80 Table 1202 4, Table 1210 4 F442/F442M-13e1: Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe (SDR-PR) Table 1202 4, Table 1210 4 F493-14: Specification for Solvent Cements for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe and Fittings 120334 F714-13: Standard Specification for Polyethylene (PE) Plastic Pipe (SDR-PR) Based on Outside Diameter Table 1210 4 F876-15A: Specification for Cross -linked Polyethylene (PEX) Tubing Table 1202 4, Table 1210 4 1`877-11a: Specification for Cross -linked Polyethylene (PEX) Plastic Hot- and Cold -water Distribution Systems Table 1202 4, Table 1202 5, Table 1210 4 F1055-13: Specification for Electrofusion Type Polyethylene Fittings for Outside Diameter Controlled Polyethylene and Cross - linked Polyethylene (PEX) Pipe and Tubing Table 12105, 1210662 F1281-11: Specification for Cross -linked Polyethylene/Aluminum/Crosslinked Polyethylene (PEX-AL-PEX) Pressure Pipe Table 1202 4 F1282-10: Standard Specification for Polyethylene/Aluminum/Polyethylene (PE -AL -PE) Composite Pressure Pipe Table 1202 4 Table 1210 4, Table 1210 5 2018 INTERNATIONAL MECHANICAL CODE® 133 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED A--dby HDOP, Van Cm,(hv dmep -dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PAL(PST) T--tto ( I.—Ag,,—®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMbtmPOo3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFERENCED STANDARDS ASTM—continued F1476-07(2013): Specification for Performance of Gasketed Mechanical Couplings for Use in Piping Applications Table 1202 5, 1203 3 7 F1548-01(2012): Standard Specification for the Performance of Fittings for Use with Gasketed Mechanical Couplings Used in Piping Applications Table 1202 5 F1807-15: Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross -linked Polyethylene (PEX) Tubing and SDR9 Polethylene of Raised Temperature (PE-RT) Tubing Table 1202 5, Table 1210 5 F1924-12: Standard Specification for Plastic Mechanical Fittings for Use on Outside Diameter Controlled Polyethylene Gas Distribution Pipe and Tubing 1210663 F1960-15: Specification for Cold -expansion Fittings with PEX Reinforcing Rings for Use with Cross -linked Polyethylene (PEX) Tubing Table 1202 5 F1974-09(2005): Standard Specification for Metal Insert Fittings for Polyethylene/Aluminum/Polyethylene and Cross -linked Poly- ethylene/Aluminum/Cross-linked Polyethylene Composite Pressure Pipe Table 1202 5 F2080-15: Specification for Cold -expansion Fittings with Metal Compression -sleeves for Cross -linked Polyethylene (PEX) Pipe Table 1202 5 F2098-08: Standard Specification for Stainless Steel Clamps for Securing SDR9 Cross -linked Polyethylene (PEX) Tubing to Metal Insert and Plastic Insert Fittings Table 1202 5 F2159-14: Standard Specification for Plastic Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross -linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE-RT) Tubing Table 1202 5, Table 1210 5 F2389-15: Specification for Pressure -rated Polypropylene Piping Systems Table 1202 4, Table 1202 5, 1203 15 1, Table 1210 4, Table 1210 5, 1210 6 7 1 F2434-14: Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross -linked Polyethylene (PEX) Tubing and SDR9 Cross -linked Polyethylene/Aluminum/Crosslinked Polyethylene (PEX-AL-PEX) Tubing Table 1210 5 F2623-14: Standard Specification for Polyethylene of Raised Temperature (PE-RT) SDR9 Tubing Table 1202 4, Table 1210 4 F2735-09: Standard Specification for Plastic Insert Fittings for SDR9 Cross -linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing Table 1202 5 F2769-14: Polyethylene of Raised Temperature (PE-RT) Plastic Hot- and Cold -water Tubing and Distribution Systems Table 1202 4, Table 1210 5 F2806-10(2015): Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe (Metric SDR-PR) Table 1202 4 AWSAmerican Welding Society 8669 NW 36 Street, #130 Miami, FL 33166 A5.SM/A5.8-2011: Specifications for Filler Metals for Brazing and Braze Welding 1203 3 1, 1303 3 1 134 2018 INTERNAT10NAL MECHANICAL CODE® firill ' CopyaghtOoz0ly ICC ALL RIGHTS RESERVED A--dby HDOP, Cm Cm, rhv dmep -d—od mm).(QtyofR—d—od)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( I.—Agffi,—o ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEMEM.AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER REFERENCED STANDARDS A VV VV A American Water Work Association 6666 West Quincy Avenue Denver, CO 80235 C901-16: Polyethylene (PE) Pressure Pipe and Tubing,'/a in. (19 mm) through 3 in. (76 mm) for Water Service Table 1210 4 C110/A21.10-12: Standard for Ductile Iron & Gray Iron Fittings Table 1202 5 C115/A21.15-11: Standard for Flanged Ductile -iron Pipe with Ductile Iron or Grey -iron Threaded Flanges Table 1202 4 C151/A21.51-09: Standard for Ductile -iron Pipe, Centrifugally Cast for Water Table 1202 4 C153/A21.53-11: Standard for Ductile -iron Compact Fittings for Water Service Table 1202 5 Ci SC Consumer Product Safety Comrmssion 4330 East West Highway Bethesda, MD 20814 CPSC August 2011. Title 15 of the Federal Hazardous Substance Act 202, 1009 1 CSA CSA Group 8501 East Pleasant Valley Road Cleveland, OH 44131-5516 B137.2-16: Polyvinylchloride (PVC) Injection -moulded Gasketed Fittings for Pressure Applications Table 1210 5 B137.3-16: Rigid Poly (Vinyl Chloride) (PVC) Pipe for Pressure Applications Table 1210 5 B137.6-16: Chlorinated Polyvinylchloride (CPVC) Pipe, Tubing and Fittings for Hot- and Cold -water Distribution Systems Table 1210 5 B137.9-16: Polyethylene/Aluminum/Polyethylene (PE -Al —PE) Composite Pressure -pipe Systems Table 1202 4, Table 1210 4, Table 1210 5 B137.10-16: Cross -linked Polyethylene/Aluminum/Cross-linked Polyethylene (PEX-AlrPEX) Composite Pressure -pipe Systems Table 1202 4 CSA C448 Series-16: Design and Installation of Earth Energy Systems Table 1210 5 CSA C22.2 No. 218.1—MS9(R2011): Spas, Hot Tubs and Associated Equipment 9161 CSA C22.2 No. 236-11: Heating and Cooling Equipment 9161 CSA B137.1-16: Polyethylene (PE) Pipe, Tubing and Fittings for Cold -water Pressure Services Table 1210 4, Table 1210 5 CSA B137.5-16: Crosslinked Polyethylene (PEX) Tubing Systems for Pressure Applications Table 1210 4, Table 1210 5 CSA B137.11-16: Polypropylene (PP-R) Pipe and Fittings for Pressure Applications Table 1210 4, Table 1210 5 CSA B137.18-13: Polyethylene of Raised Temperature Resistance (PE-RT) Tubing Systems for Pressure Applications Table 1202 4, Table 1202 5, Table 1210 5 America FC1-2012: Stationary Fuel Cell Power Systems 924 1 2018 INTERNATIONAL MECHANICAL CODE® 135 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tto ( I.—Ag,,vo ,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFERENCED STANDARDS DOL US Department of Labor Occupational Safety and Health Administration c/o Superintendent of Documents U S Government Printing Office Washington, DC 20402-9325 29 CFR Part 1910.1000 (2015): Air Contaminants 5026 29 CFR Part 1910.1025 (2015): Toxic and Hazardous Substances 502 19 FDAU S Food and Drug Administration 10903 New Hampshire Avenue Silver Sprigs, MD 20993 FDA Title 15: Federal Hazardous Substances Act 14034 FDA Title21: Code of Federal Regulations, Title 21, Food and Drugs, Chapter 1, Food and Drug Administration, Parts 174-186 (revised as of April 1, 2015) 14033 FSFederal Specifications* General Services Administration 7th & D Streets Specification Section, Room 6039 Washington, DC 20407 WW-P-325B (1976): Pipe, Bends, Traps, Caps and Plugs; Lead (for Industrial Pressure and Soil and Waste Applications) Table 1202 4 *Standards are available from the Supt of Documents, U S Government Printing Office, Washington, DC 20402-9325 //''�� Il. C International Code Council, Inc 500 New Jersey Ave NW 6th Floor Washungton, DC 20001 IBC-18: International Building Code® 2013, 202, 301 15, 301 16, 301 17, 301 18, 302 1, 302 2, 304 8, 304 11, 308 4 2 2, 308 4 2 4, 4014, 4015, 406 1, 501 3 1, 5013 2, 501 10 2, 502 10, 502 10 1, 504 2, 504 10, 505 3, 506 3 3, 506 3 10, 5063122, 506 4 1, 509 1, 510 6, 51063, 51062,5107, 510711, 51072, 51073, 5108, 51115, 5131, 5132, 5133, 51343, 5135, 51352, 513521, 51353, 513532, 51362, 513 10 5, 513 11 1, 513 12, 513 12 2, 513 20, 601 3, 602 2, 602 2 15 1, 602 2 1 5 2, 602 2 16 1, 602 2 1 6 2, 602 3, 602 4, 603 1, 603 10, 603 13, 603 18 2, 604 5 4, 607 1 1, 607 1 2, 607 3 2 1, 607 5 1, 607 5 2, 607 5 3, 607 5 4, 607 5 4 1, 607 5 5, 607 5 5 1, 607 5 6, 607 6, 607 6 1, 607 6 2, 607 6 2 1, 607 6 3, 7012, 701 4 1, 7014 2, 801 3, 801 16 1, 801 18 4, 801 18 4 1, 902 1, 908 3, 908 4, 910 3, 924 1, 925 1, 926 1, 927 2, 928 1, 1004 6, 1105 1, 1206 4, 1210 8 2, 1305 2 1, 1402 4, 1402 4 1 IECC-18: International Energy Conservation Code® 3012, 303 3, 312 1, 4012, 514 1, 604 1, 1204 1, 1204 2 IFC-18: International Fire Code® 2013, 310 1, 311 1, 502 4, 502 5, 502 7 2, 502 8 1, 502 9 1, 502 9 5, 502 9 5 2, 502 9 5 3, 502 9 8 2, 502 9 8 3, 502 9 8 5, 502 9 8 6, 502 9 11, 502 10, 502 10 3, 502 16 2, 509 1, 510 2 1, 510 2 2, 510 5, 511 1 1, 513 1, 513 2, 51363, 513 12 1, 513 12 3, 513 12 4, 51315, 51316, 51317, 51318, 51319, 606 2 1, 606 4 1, 908 7, 924 1, 926 1, 11019, 1105 3, 1105 9, 1106 5, 1106 6, 1301 1, 13012, 1301 5 IFGC-18: International Fuel Gas Code® 1012, 201 3, 301 6, 701 1, 801 1, 901 1, 906 1, 926 1, 11015 IPC-18: International Plumbing Code® 2013, 301 11, 307 2 2, 512 2, 908 5, 928 1, 1002 1, 1002 2, 1002 3, 1005 2, 1006 6, 1008 2, 1009 3, 1101 4, 1201 1, 1206 2, 1206 3, 1210 8 1, 14012 136 2018 INTERNATIONAL MECHANICAL CODE® " ' C'TF'ghtO@Z017ICC ALL RIGHTS RESERVED Awsedby H®I,,Van Dm,(hv dmep ,,dv oodmm).(Qtyof Pnmdv ood)O,d,,N=b¢x1ooe1vmsooJM14,zmoozoo PM(PST)pu mtto I ( S I.-Ag,,-o ,AOIcC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dpartyo,Axmbot-Ooossd ANYVNAVTHORIVED RBPROD VCIION ORDISI-IION LEA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSEAGREEMENT.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHERBUNDER REFERENCED STANDARDS ICC—continued IRC-18: International Residential Code® 1012 ICC 900/SRCC Standard 300-15: Solar Thermal System Standard 1002 1, 1401 4, 1401 4 1, 1402 1, 1402 3 1, 1402 4, 1402 8 1 1, 1402 8 1 4, 1402 8 5, 1402 8 5 3, 14032 ICC 901/SRCC Standard 100-15: Solar Thermal Collector Standard 1401 4 1, 1402 8 1 1 IIAR IIAR 2-2014: Safe Design of Closed-circuit Ammonia Refrigerating Systems 1101 6,1105 6 3 ANSI/IIAR 3-2012: Ammonia Refrigeration Valves 1101 6 International Institute of Ammoma Refrigeration 1001 N Fairfax Street, Suite 503 Arlington, VA 22314 ANSI/IIAR 4-2015: Installation of Closed-circuit Ammonia Mechanical Refrigerating Systems 11016 ANSI/IIAR 5-2013: Start-up and Commissioning of Closed-circuit Ammonia Refrigeration Systems 11016 MSSManufacturers Standardization Society of the Valve and Fittings Industry, Inc 127 Park Street, NE Vienna, VA 22180 SP 58-2009: Pipe Hangers and Supports —Materials Design and Manufacture, Selection, Application and Installation 3054 NAIMA AH116-09: Fibrous Glass Duct Construction Standards 603 5, 603 9 NBIC-2011: National Board Inspection Code, Part 3 10033 NFPA 2-16: Hydrogen Technologies Code 502 16 1 30A-18: Code for Motor Fuel -dispensing Facilities and Repair Garages 3046 31-16: Standard for the Installation of Oil -burning Equipment 701 1, 801 2 1, 801 18 1, 801 18 2, 920 2, 922 1, 1308 1 North Amencan Insulation Manufacturers Association 11 Canal Center Plaza, Suite 103 Alexandria, VA 22314 National Board of Boiler and Pressure Vessel Inspectors 1055 Crupper Avenue Columbus, OH 43229-1183 National Fire Protection Association 1 Batterymarch Park Quincy, MA 02169-7471 2018 INTERNATIONAL MECHANICAL CODE® 137 I " ' CITFIghtOo2.017ICC ALL RIGHTS RESERVED A--dby HDOP, Van Cm, rhv dmep -dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PAL(PST) T--tto ( I.—Ag,,—o ,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFERENCED STANDARDS NFPA—continued 37-18: Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines 915 1,9152 58-17: Liquefied Petroleum Gas Code 5029 10 69-14: Standard on Explosion Prevention Systems 51093 70-17: National Electrical Code 3017, 306 3 1, 306 4 1, 511 1 1, 513 11, 513 12 2, 602 2 1 1, 927 2, 1104 2 2, 1106 3, 1106 4, 1402814 72-16: National Fire Alarm and Signaling Code 6063 82-14: Standard on Incinerators and Waste and Linen Handling Systems and Equipment 601 1 85-15: Boiler and Combustion Systems Hazards Code 1004 1 91-15: Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists and Noncombustible Particulate Solids 502 9 5 1, 502 17 92-15: Standard for Smoke Control Systems 51375138 96-17: Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 5071 211-16: Standard for Chimneys, Fireplaces, Vents and Solid Fuel -burning Appliances 8061 262-15: Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air -handling Spaces 602211 286-15: Standard Methods of Fire Tests for Evaluating Contribution of Wall and Ceiling Interior Finish to Room Fire Growth 6022162 704-17: Standard System for Identification of the Hazards of Materials for Emergency Response 502 8 4, 510 1, Table 1103 1 853-15: Standard on Installation of Stationary Fuel Power Plants 9241 NSF NSF International 789 N Dixboro Road P O Box 130140 Ann Arbor, MI 48105 NSF 358-1-2014: Polyethylene Pipe and Fittings for Water -based Ground -source "Geothermal" Heat Pump Systems Table 1210 4, Table 1210 5 NSF 355-2-2012: Polypropylene Pipe and Fittings for Water -based Ground -source "Geothermal" Heat Pump Systems Table 1210 4, Table 1210 5 SMACNASheet Metal and Air Conditioning Contractors' National Association, Inc 4201 Lafayette Center Drive Chantilly, VA 20151-1219 SMACNA 2015: Phenolic Duct Construction Standard 60352 SMACNA/ANSI-2016: HVAC Duct Construction Standards -Metal and Flexible 4th Edition (ANSI) 2016 603 4, Table 603 4, 603 9, 603 10 SMACNA-10: Fibrous Glass Duct Construction Standards 603 5, 603 9 138 2018 INTERNATIONAL MECHANICAL CODE® " ' Clp lght@@2017ICC ALL RIGHTS RESERVED A--dby HDOP, Cm Cm, (hv dmep -dwood mm).(CLAdR—d—od)O,d,,N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) T-mmtto S I ( RR I.—Agffi,—o ,AOICC Nofi th,, ,od,S,o,,,o u ,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢e3 ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. INC REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER REFERENCED STANDARDS UL UL LLC 333 Pfingsten Road Northbrook, IL 60062-2096 17-2008: Vent or Chimney Connector Dampers for Oil -fired Appliances —with revisions through September 2013 8036 103-2010: Factory -built Chimneys, Residential Type and Building Heating Appliance —with revisions through July 2012 8052 127-2011: Factory -built Fireplaces —with revisions through May 2015 903 1, 903 3, 903 4 174-04: Household Electric Storage Tank Water Heaters —with revisions through April 2015 1002 1 150-2012: Liquid -level Indicating Gauges for Oil Burner Fuels and Other Combustible Liquids 13064 181-05: Factory -made Air Ducts and Air Connectors —with revisions through October 2008 512 2, 603 5, 603 6 1, 603 6 2, 603 9, 604 13 181A-2013: Closure Systems for Use with Rigid Air Ducts and Air Connectors 6039 18113-2013: Closure Systems for Use with Flexible Air Ducts and Air Connectors 6039 197-10: Commercial Electric Cooking Appliances —with revisions through September 2014 9171 207-2009: Refrigerant -containing Components and Accessories, Nonelectricat—with revisions through June 2014 11012 263-2011: Standard for Fire Test of Building Construction and Materials —with revisions through June 2015 607 5 2, 607 5 5, 607 6 1, 607 6 2 1 265-2009: Smoke Detectors for Fire Alarm Systems 606 1 26SA-2008: Smoke Detectors for Duct Application —with revisions through October 2014 606 1 343-2008: Pumps for Oil -burning Appliances —with revisions through June 2013 13027 375-06: Draft Equipment with revisions through June 12, 2014 804 3, 804 3 8 391-2010: Solid -fuel and Combination -fuel Central and Supplementary Furnaces —with revisions through June 2014 918 1 412-2011: Refrigeration Unit Coolers —with revisions through September 2013 11012 471-2010: Commercial Refrigerators and Freezers —with revisions through December 2012 11012 499-05: Electric Heating Appliances —with revisions through November 2014 912 1,923 1 507-2014: Standard for Electric Fans 5052 505-99: Industrial Control Equipment —with revisions through October 2013 30723 536-97: Flexible Metallic Hose —with revisions through December 2014 13028 555-06: Fire Dampers —with revisions through May 2014 6073 1 555C-06: Ceiling Dampers —with revisions through December 2014 6073 1 555S-99: Smoke Dampers —with revisions through February 2014 6073 1 2018 INTERNATIONAL MECHANICAL CODE® 139 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED A--dby HDOP, Van Cm,(hv dmep -dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 01jM 10-0 m. oo PAL(PST) T--tto ( I.—Ag,,—o ,AOICC Nof th,,e,od,�,00.mfw ,,e od,S,00zbyany ,dPartyo, AxmboemPOo[vs3 ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER REFERENCED STANDARDS UL—continued 586-2009: High -efficiency, Particulate, Air Filter Units —with revisions through September 2014 6052 641-2010: Type L Low -temperature Venting Systems —with revisions through June 2013 802 1 705-2004: Standard for Power Ventilators —with revisions through December 2013 5045 710-2012: Exhaust Hoods for Commercial Cooking Equipment —with revisions through November 2013 5071 71OB-2011: Recirculating Systems —with revisions through August 2014 507 1, 507 2 723-2008: Standard for Test for Surface Burning Characteristics of Building Materials —with revisions through August 2013 510 9, 602 2, 602 2 1, 602 2 1 6, 602 2 1 6 2, 602 2 16 3, 602 2 17, 604 3, 1204 1 726-95: Oil -fired Boiler Assemblies —with revisions through October 2013 916 1, 1004 1 727-06: Oil -fired Central Furnace —with revisions through October 2013 918 1 729-03: Oil -fired Floor Furnaces —with revisions through October 2013 9101 730-03: Oil -fired Wall Furnaces —with revisions through October 2013 909 1 731-95: Oil -fired Unit Heaters —with revisions through October 2013 920 1 732-95: Oil -fired Storage Tank Water Heaters —with revisions through October 2013 1002 1 737-2011: Fireplace Stoves —with revisions through August 2015 905 1 762-2010: Outline of Investigation for Power Ventilators for Restaurant Exhaust Appliances —with revisions through October 2013 5065 1 791-06: Residential Incinerators —with revisions through November 2014 9071 834-04: Heating, Water Supply and Power Boilers Electric —with revisions through December 2013 1004 1 842-07: Valves for Flammable Fluids —with revisions through May 2015 1307 1 858-05: Household Electric Ranges —with revisions through June 2015 9171 867--2011: Electrostatic Air Cleaners —with revisions through August 2013 6052 875-09: Electric Dry Bath Heater —with revisions through December 2013 9142 896-93: Oil -burning Stoves —with revisions through November 2013 917 1, 922 1 900-04: Air Filter Units —with revisions through April 2015 6052 907-94: Fireplace Accessories —with revisions through June 2014 9022 923-2013: Microwave Cooking Appliances —with revisions through June 2015 9171 959-2010: Medium Heat Appliance Factory -built Chimneys —with revisions through June 2014 8055 1046-2010: Grease Filters for Exhaust Ducts —with revisions through January 2012 50728 140 2018 INTERNAT10NAL MECHANICAL CODE® " ' Clp lght@@2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm,(hvdmepf da od mm).(Qtyof PRmdNmod)O,d,,N=b,,x10081vms 01jM 10-0 m. oo PM (PST) T--tto S I ( MRR I.i Agffi,vo ,AOICC Nof th,, ,od,S,00.mf�ut,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHOIGAED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGREEME NT. AND REJECT TO CIVIL AND CRIMINAL PENALTIESTHEREUNDER REFERENCED STANDARDS UL—continued 1240-2012: Electric Commercial Clothes —Drying Equipment with revisions through October 2012 9131 1261-01: Electric Water Heaters for Pools and Tubs —with revisions through July 2012 916 1 1453-04: Electric Booster and Commercial Storage Tank Water Heaters —with revisions through July 2011 1002 1 1479-03 : Fire Tests of Through -penetration Firestops—with revisions through June 2015 506 3 11 2, 506 3 11 3 1482-2011: Solid -fuel Type Room Heaters —with revisions through August 2015 905 1 1563-2009: Standard for Electric Spas, Hot Tubs and Associated Equipment with revisions through March 2015 9161 1618-09: Wall Protectors, Floor Protectors and Hearth Extensions —with revisions through October 2015 308 4 1, 903 2, 905 3 1777-2007: Chimney Liners —with revisions through October 2015 801 16 1, 801 18 4 1812-2013: Standard for Ducted Heat Recovery Ventilators —with revisions through April 2014 5141 1815-2012: Standard for Nonducted Heat Recovery —with revisions through April 2014 5141 1520-04: Fire Test of Pneumatic Tubing for Flame and Smoke Characteristics —with revisions through May 2013 602213 1887--04: Fire Tests of Plastic Sprinkler Pipe for Visible Flame and Smoke Characteristics —with revisions through May 2013 602212 1978-2010: Grease Ducts —with revisions through September 2013 50632, 50636 1995-2011: Heating and Cooling Equipment —with revisions through July 2015 908 1, 911 1, 918 1, 918 2, 1101 2 1996-2009: Electric Duct Heaters —with revisions through June 2014 911 1 2024-2011: Standard for Safety Optical -fiber and Communications Cable Raceway —with revisions through August 2015 602211 2043-2008: Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air -handling Spaces —with revisions through October 2013 6022142 2075-2013: Standard for Gas and Vapor Detectors and Sensors 404 1 2158-97: Electric Clothes Dryers —with revisions through March 2009 9131 215SA-2010: Outline of Investigation for Clothes Dryer Transition Duct 50483 2162-01: Outline of Investigation for Commercial Wood -fired Baking Ovens -Refractory Type 9171 2200-2012: Stationary Engine Generator Assemblies —with revisions through July 2015 9151 2221-2010: Tests of Fire Resistive Grease Duct Enclosure Assemblies 5063 11 3 2518-05: Air Dispersion System Materials 603 17 2523-09: Solid Fuel -fired Hydronic Heating Appliances —with revisions through February 2013 1002 1, 1004 1 2846-14: Fire Test of Plastic Water Distribution Plumbing Pipe for Visible Flame and Smoke Characteristics 602217 2018 INTERNATIONAL MECHANICAL CODE® 141 I " ' CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf da od mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 01jan IOZM0 m. oo PAL(PST) Tug tto ( I.—Ag,, ^®,AOICC Nof th,,e,od,�,oamfw ,,e od,�,o¢tbyany ,dPartyo, AMbtmPOod ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 142 2018 INTERNATIONAL MECHANICAL CODED Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGRE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER 100817028 Appendix A Chimney Connector Pass-Throughs This appendix is informative and is not part of the code. User note: About this appendix. Appendix A is a depiction of what is prescribed in Table 803.10.4. See Section 803.10.4. 1 ., WATER -INSOLUBLE REFRACTORY CEMENT\ w WW zD � J U� CHIMNEY SECTION - FLUSH WITH INSIDE OF FLUE For SL I inch = 25.4 ram. SYSTEM A SYSTEM 8 ---�--jjj 2" MIN. CHIMNEY CLEARANCE I �TO BRICK AND COMBUSTIBLE MATERIALS. MIN. CLEARANCE: 12" OF BRICK W D CHIMNEY CONNECTOR J W } W Z = FIRE -CLAY LINER U 1 /2" THICK BRICK MASONRY CHIMNEY 2" MIN. CHIMNEY CLEARANCE FROM MASONRY TO SHEET METAL SUPPORTS AND COMBUSTIBLE .�. MATERIALS. 9" MIN. CLEARANCE FACTORY -BUILT CHIMNEY SECTION �— CHIMNEY CONNECTOR 9" MIN. AIR SPACE ~-- CHIMNEY SECTION MANUFACTURER'S PARTS SHALL BE UTILIZED TO ATTACH CONNECTOR TO CHIMNEY SECTION. - LABELED, SOUD-INSULATED, FACTORY - BUILT CHIMNEY SECTION SHEET STEEL SUPPORTS MASONRY CHIMNEY FIGURE A-1 CHIMNEY CONNECTOR SYSTEMS (continued) 2018 INTERNATIONAL MECHANICAL CODE° 143 Copyright@ 2017 ICC ALL RIGHTS RESERVED Accessed by Heather Van Dme(hvandmeVriendswood com),(City of Fri endswood)Order NumberGlooa17028 on Jan 14, 2020 02 oo PM (PST) pursuant to + License Agreement with ICC No further reproduction, no further reproductions by anythird party, or distribution authorized Single user only, copying and networlangprohibited ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER APPENDIX A 100817028 SYSTEM C 2" MIN. CHIMNEY CLEARANCE TO SHEET STEEL SUPPORTS AND l[GLAI STIBLE MATERIALS SHEET METAL THIMBLE S-FIBER INSULATION (24 GAGE MIN.) O 1" AIR CHANNELS W CHIMNEY CONNECTOR (24 GAGE MIN.) im Im ui lUg z x MIN. TWO VENTILATED AIR CHANNELS EACH OF1". EET STEEL SUPPORTS (24 GAGE MIN.) MASONRY CHIMNEY SYSTEM D FACTORY -BUILT CHIMNEY SECTION CHIMNEY CONNECTOR W (24 GAGE MIN.) J W z 2" AIRSPACE L) - SHEET STEEL SUPPORTS For SI 1 mch = 25 4 mm [-2" MIN. CHIMNEY CLEARANCE TO SHEET STEEL SUPPORTS AND COMBUSTIBLE MATERIALS. 2" MIN. CLEARANCE 1" ANNULAR AIRSPACE BETWEEN CHIMNEY CONNECTOR AND CHIMNEY SECTION CHIMNEY CONNECTOR FACTORY -BUILT CHIMNEY SECTION `SHEET STEEL SUPPORTS MASONRY CHIMNEY FIGURE A-1—continued CHIMNEY CONNECTOR SYSTEMS 144 2018 INTERNATIONAL MECHANICAL CODE° C,p �ght02ol�ICC ALL RIGHTS RPSERVED A¢e Aby HeaLu Ve�Dme(hve�d��egfnendswood com),(C�ty of Pr�endswood)Order Number.......... o�]e�.q zo2o oa. oo PM (PST)pueave�tro IM117Lcuue Agreement-th ICC No furLer reprodumon, no furLer reprodumo�sby e�y Lard party, or d�smbut�o�euNor¢ed S�� le useroN,co d�etworla� Lb�ted ANYUNAUTHORIFED g ➢ P➢��g en gyro REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER Appendix B Recommended Permit Fee Schedule This appendix is informative and is not part of the code. User note: About this appendix., Appendix B is an example of or recommendation for a mechanical permit fee schedule that can be implemented by an authority ha vingjurlsdiction. See Section 106.5. B101 MECHANICAL WORK, OTHER THAN GAS PIPING SYSTEMS B101.1 Initial Fee For issuing each permit $ B101.2 Additional Fees B101.2.1 Fee for inspecting heating, ventilating, ductwork, au -conditioning, exhaust, venting, combustion air, pressure ves- sel, solar, fuel oil and refrigeration systems and appliance installations shall be $ for the first $1,000 00, or fraction thereof, of valuation of the installation plus $ for each additional $1,000 00 or fraction thereof B101.2.2 Fee for inspecting repairs, alterations and additions to an existing system shall be $ plus $ for each $1,000 00 or fraction thereof B101.2.3 Fee for inspecting boilers (based upon Btu input) 33,000 Btu (1 bhp) to 165,000 (5 bhp) $ 165,001 Btu (5 bhp) to 330,000 (10 bhp) $ 330,001 Btu (10 bhp) to 1,165,000 (52 bhp) $ 1,165,001 Btu (52 bhp) to 3,300,000 (98 bhp) $ Over 3,300,000 Btu (98 bhp) $ For SI 1 British thermal unit= 0 2931 W, 1 bhp=33,475 Btu/hr B102 FEE FOR REINSPECTION If it becomes necessary to make a remspectlon of a heating, ventilation, au -conditioning or refrigeration system, or boiler instal- lation, the installer of such equipment shall pay a remspectlon fee of $ B103 TEMPORARY OPERATION INSPECTION FEE When preliminary inspection is requested for purposes of permitting temporary operation of a heating, ventilating, refrigeration, or au -conditioning system, or portion thereof, a fee of $ shall be paid by the contractor requesting such preliminary mspec- tion If the system is not approved for temporary operation on the first preliminary inspection, the usual remspectlon fee shall be charged for each subsequent prelimnary inspection for such purpose B104 SELF-CONTAINED UNITS LESS THAN 2 TONS In all buildings, except one- and two-family dwellings, where self-contained air-conditioning arms of less than 2 tons (7 034 kW) are to be installed, the fee charged shall be that for the total cost of all units combined (see B101 2 1 for rate) 2018 INTERNATIONAL MECHANICAL CODE® 145 I I l I CITFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hvdmepf dwood mm).(Qtyof FRmdNmod)O,d,,Nomb,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tto ( I.i Ag,, ^®,AOICC Nof th,,e,od�oamfw ,,e od�o¢tbyany ,dPartyo, AMb�tmPOo�vsd 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISTIUBVTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 146 2018 INTERNATIONAL MECHANICAL CODE® Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGRE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER INDEX n ADMINISTRATION AND ENFORCEMENT Chapter 1 AIR Combustion Chapter 7 Dispersion systems 60317 Distribution systems Chapter 6 Filters 605 Recirculation 40321 Supply Chapter 4 Transfer 40322 Ventilation Chapter 4 ALTERNATIVE MATERIALS AND METHODS 1052 AMMONIA 1105 8, 1106 3, 1106 4 APPEAL 109 APPLIANCES Access 306 Cooking 917 Hazardous location 3032 Installation Chapters 3, 9 Outdoors 3036 Prohibited locations 3033 APPLICABILITY OF CODE 102 APPROVAL 105 ATTIC VENTILATION 406 AUTOMATIC FIRE SUPPRESSION, KITCHEN EXHAUST 509 AUTOMATIC VENT DAMPERS 8036 BALANCING, VENTILATION SYSTEM 4037 BARBECUE APPLIANCES 906 BATHROOM VENTILATION 402,403 BLOWOFF VALVE, STEAM 1008 BOILERS Approval 10041 Controls 1006 Gauges 1010 General 1001 Low-water cutoff 1007 Rooms 3047, 10046 Tests 1011 BURNER, CONVERSION 919 c CANOPY HOODS 507 12, 507 13 CEILING DAMPERS 607 CHILLED WATER PIPING Chapter 12 CHIMNEYS AND VENTS Connectors 803 Dampers 803 5, 803 6 Direct vents 8041 Exhausters 8043 Existing 801 18 Factory built 802,805 General 801 Insulation shield 8057 Liners 801 16, 801 17, 801 18 Masonry, general 801 Offsets 8053 Vents 802 CLEANOUTS Clothes dryer exhaust 5043 Kitchen exhaust 506 3 8, 506 3 9, 506 3 12 Masonry chimneys 801 13 CLEARANCES Appliance in garages 304 3, 304 6, 304 7 Chimney and vent 801 184 Connectors 803 10 6 Kitchen exhaust 50636, 5079 Reduction 308 Specific appliances Chapter 9 CLOTHES DRYER Appliance 913 Exhaust 504 COAL -BURNING APPLIANCES Chapter 9 CODE OFFICIAL 103, 104, 202 COLLECTORS, SOLAR 1402 8 1, 1404 1 COMBUSTIBLE LIQUID STORAGE TANK 1301 COMBUSTIBLES, REDUCED CLEARANCE 308 COMBUSTION AIR Chapter 7 COMMERCIAL KITCHEN EXHAUST 506 Hoods 507 CONDENSATE DISPOSAL 307 CONDENSATION Ducts 60312 Piping 11074 CONFLICTS 102 8 1, 102 8 2 CONNECTORS, CHIMNEY OR VENT 803 CONTAMINANTS, VENTILATION AIR 401 4,401 6 2018 INTERNAT10NAL MECHANICAL CODE® 147 I I I I COTFIghtOo2.017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tto ( I.i Ag,, ^®,AOICC Nof th,,e,od�oamfw ,,e od�o¢tbyany ,dPartyo, AMb�tmPOo�vsd 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER INDEX CONVERSION BURNERS 919 E CONVEYOR SYSTEMS 511 ELECTRIC INSTALLATION 301 10 COOKING APPLIANCES 917 ENERGY EFFICIENCY 301 2 COOLING TOWERS 908 ENERGY RECOVERY SYSTEMS 514 COOLING WATER PIPING Chapter 12 ENGINEITURBINE EQUIPMENT 915 COVERING, DUCT 6043 EQUIPMENT ACCESS 306 CRAWL SPACE PLENUMS 602 EQUIPMENT IDENTIFICATION 304 12, 504 6 5 CRAWL SPACE, VENTILATION 406 EVAPORATIVE COOLING 928 CREMATORIES 907 EXHAUST, DOMESTIC COOKING 505 CUTTING, NOTCHING, BORING 302 EXHAUST, DOWNDRAFT 5072 EXHAUST, REQUIRED SYSTEMS 502 D Clothes dryer 504 DAMPERS Discharge 501 3 Chimney or vent 8035, 8036 Ducts 501 4 Fire 607 Independence 501 2 Smoke 607 Outlets 501 3,501 31 DEFINITIONS Chapter 2 Kitchen 506,507 DETECTORS, DUCT SMOKE 606 Machinery room 1105, 1106 DOCUMENTS 10631 Mechanical 403, Chapter 5 DRYER, CLOTHES System, hazardous 510 Exhaust 504 Ventilator openings 401 4, 401 5 General 913 EXHAUSTER, MECHANICAL FLUE 804 DUCT EXISTING SYSTEMS 1022 Clothes dryer exhaust 504 EXPLOSION VENTING 310 Construction 603 Covering 6043 Detectors, smoke 606 F Diffusers 60318 FACTORY BUILT Enclosure 506 3 11, 510 4 Barbecue appliance 906 Exhaust 5015 Chimneys 805 Fire damper 607 Commercial exhaust hoods 5071 Flexible 6036 Ducts (kitchen exhaust) 506 3 1 1, 506 3 2, Furnace 9182 506 3 2 5, 506 3 6, 506 3 11 3 Hangers and supports 60310 Fireplaces 903 Hazardous exhaust 510 FANS, EXHAUST 503, 50651 Installation 603 FANS, HIGH -VOLUME LARGE DIAMETER 929 Insulation 604 FILTERS, AIR 605 Joints, seams and connections 6039 FILTERS, GREASE 50711 Kitchen exhaust 506 FIRE DAMPERS 607 Lining 6043 FIRE SUPPRESSION Penetrations 607 Hazardous exhaust 5107 Phenolic 60352 Kitchen exhaust 509 Plastic 60383 FIREPLACE STOVE 905 Private garage 6037 FIREPLACES Sealing 60382,6039 Accessories 9022 Sizing 6032 Factory built 903 Smoke damper 607 Masonry 9021 Systems Chapter 6 FLEXIBLE CONNECTORS (DUCT) 6036, 6077 Underground 6038 FLEXIBLE CONNECTORS, HYDRONIC 12027 Underground grease 506310 FLEXIBLE DUCTS 6036, 6077 DUST, STOCK AND REFUSE FLOOD HAZARD 301 16, 401 4, 501 3 2, CONVEYOR SYSTEMS 511 602 4, 603 13 148 2018 INTERNATIONAL MECHANICAL CODE® 0I.i S I ( I I COTF,ghtOoz0ly ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 01jM 10-0 m. oo PAL (PST) Tummtto Agffi,vo ,AOICC Nofth,,,od,S,o,,,o�t,,, od,S,00zbyany ,dputyo,AxmboemPOoossd ANYVNAVTHORIVED RBPROD VCIION ORDISI—IION LEA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSEAGREEMBNT.AND SUBJECT TO CIVIL AND CRIMINAL PENALTIESTHERBUNDER INDEX FLOOR FURNACE 910 FLUE LINERS 801 16, 801 18 2 FUEL, CONVERSION 301 12 FUEL CELLS 924 FUEL OIL Piping Chapter 13 Piping installation 1305 Piping material 1302 FURNACE, FORCED -AIR 918 FURNACE ROOM 3048 r GAUGES, BOILERS 1010 GREASE 506,507 GREASE FILTERS 50711 GREASE RESERVOIRS 506371 GRILLES 60318 GUARDS 304 11, 306 5 1 I:I HANGERS, DUCT 60310 HANGERS, PIPE 305 HAZARDOUS EXHAUST SYSTEM 510 HAZARDOUS LOCATION, EQUIPMENT 304 3, 901 3 HAZARDOUS LOCATION, INSTALLATION 3043 HEARTH EXTENSIONS 9053 HEATER Chapter 9 HEAT PUMP 9183 HOOD, EXHAUST 505, 506, 507, 510 5 3 HOOD DESIGN (KITCHEN) 507 HOOD LABEL 50721 2 HOT WATER BOILERS Chapter 10 HOT WATER PIPING Chapter 12 HYDROGEN GENERATION AND REFUELING 304 5, 926 HYDRONIC PIPING Chapter 12 IGNITION SOURCE 202,3043 INCINERATORS 907 INFRARED HEATERS 912 INSPECTION 107 INSULATION Duct 604 Pipe 1204 INTAKE OPENINGS 401 4 J JOINTS Connectors 803 10 1 Duct 506 3 2, 510 8 1, 603 9 Piping 1003 2, 1107 6, 1107 7, 1203, 1303 K KEROSENE STOVE 922 KILNS 923 KITCHEN EXHAUST EQUIPMENT Chapter 5 L LABELING Criteria for 301 4, 301 5, 301 6 LINER, FLUE 801 16 LINING, DUCT 6043 LISTING 301 7 LOAD CALCULATIONS, HEATING AND COOLING 312 LOCATION, EQUIPMENT AND APPLIANCE 303 LOW-WATER CUTOFF, BOILER 1007 T MACHINERY ROOMS 1104 2, 1105, 1106 MAINTENANCE 1023 MAKEUP AIR, EXHAUST 508,51055 MAKEUP WATER 908 5, 1005 2, 1206 3, 1207 2, 1401 2 MASONRY CHIMNEYS Chapter 8 MASONRY FIREPLACE 902 MECHANICAL EXHAUST/DRAFT 804 MECHANICAL OFFICIAL (see CODE OFFICIAL) MECHANICAL REFRIGERATION Chapter 11 MECHANICAL VENTILATION 30452,403 MOTORS, FAN 503,50651 1 MOVED STRUCTURE 1027 N NATURAL VENTILATION 30441,402 NONCANOPY HOODS 50714 w OIL, FUEL PIPING Chapter 13 OPENINGS Outside 401 4, 401 5, 501 3 2 Transfer 607 2018 INTERNAT10NAL MECHANICAL CODE® 149 I I I I COTFIghtOo2017ICC ALL RIGHTS RESERVED A--dby HDOP, Van Cm,(hv dmep -dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms 01jM 10-0 m. oo PAL(PST) T--tto ( I.—Ag,,—®,AOICC Nof th,,e,od�oamfw ,,e od�o¢tbyany ,dPartyo, AMb�tmPOo�vsd 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER INDEX OUTDOOR APPLIANCE INSTALLATION 3036 SMOKE DETECTORS 606 OUTSIDE AIR, MINIMUM 403 SOLAR THERMAL Chapter 14 SOLID FUEL -BURNING i PELLET FUEL -BURNING APPLIANCES 904 PENETRATIONS 302 2, 607 PERMITS 106 PIPE Insulation 11073, 1204 Support 305 PIPING Fuel oil Chapter 13 Material, fuel oil 1302 Material, hydronic 1202 Refrigerant 1107 Support 305 PLENUMS 602 PLUMBING CONNECTIONS 301 8 POLLUTION -CONTROL UNITS 50652 POOL/SPA HEATER 916 POWER EXHAUSTER 804 PRESSURE GAUGE 1010 PRESSURE VESSEL 1003 IN RADIANT HEATER 912 RADIANT HEATING SYSTEMS 927 RANGE HOODS Chapter 5 REDUCED, CLEARANCE 308 REFRIGERANT Chapter 11 Locking access caps 1101 10 Piping 1107 Quantity 1104 REFRIGERANT PIPING 1107 REGISTERS 60318 RELIEF VALVES, FUEL OIL 1307 RELIEF VALVES, PRESSURE VESSELS 1006 RELIEF VALVES, SOLAR 14023 REPAIRS 1024 ROOM HEATERS, SOLID FUEL 904, 905, 921 Cq APPLIANCES Chapter 9 STANDARDS, REFERENCED 102 8, Chapter 15 STEAM Blowoff 1008 Boilers Chapter 10 Gauge 1010 Piping Chapters 10, 12 SUBSLAB SOIL EXHAUST SYSTEM 512 SUPPORTS,DUCT 60310 SUPPORTS, PIPING 305 SUPPRESSION Hazardous exhaust 5107 Kitchen exhaust 509 TANKS, EXPANSION 1009, 1402 8 7 TANKS, FLAMMABLE AND COMBUSTIBLE LIQUIDS Chapter 13 TEMPERATURE CONTROL 3091 TEMPERATURE GAUGE 1010 TEMPERATURE RELIEF, SOLAR 14024 TESTS Boiler/pressure vessel 1011 Ducts 60382 Fuel oil piping 1308 Hydronic piping 1208, 12092 Kitchen exhaust 50716 Refrigeration 1108, 1109 THERMAL STORAGE, SOLAR 14042 THIRD -PARTY CERTIFICATION 301 4, 301 5 TOILET ROOM VENTILATION 402 1, Table 403 3 1 1 TRANSFER FLUID Hydronic piping 1207 Solar 1403 U UNDERGROUND STORAGE TANKS Chapter 13 UNIT HEATER 920 UNSAFE CONDITIONS 1087 UNVENTED GAS LOG HEATERS 9033 SAFETY VALVE 1006 SAUNA HEATER 914 V SCOPE OF CODE 1012 VALVES SEISMIC 301 15 Boilers 1005, 1008 SIGHT GLASS 1010 Fuel oil 1307 SMOKE AND HEAT VENTS 311 Hydronic 1205 SMOKE CONTROL 513 Safety and relief 1006 SMOKE DAMPERS 607 Stop 11077 150 2018 INTERNATIONAL MECHANICAL CODE® S I ( lk 1 I COTFIghtOoz0ly ICC ALL RIGHTS RESERVED Awsdby HDOP, Cm Cm, (hv dmepf da od Pm),(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM 10-0 m. oo PAL (PST) Tummtto L. Ag,e^ ',AOD'C Nof th,, ,od�o,,,o ih,,e od�o¢tbyany ,dPartyo, AMb�tmPOo�vsd 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER INDEX VAPOR RETARDER 60411 VENTILATION Air Chapter 4 Enclosed parking garages 404 Energy recovery systems 514 Machinery room 1105, 1106 Mechanical 30452,403 Natural 30441, 402 Openings 401 4,401 5 Rate 4033 Recirculation 40321 Transfer 40322 Uninhabited spaces 406 VENTILATORS, HEAT RECOVERY 514 VENTS Connectors 803 Direct 804 Explosion 310 General 802, Chapter 8 Height 8026 Smoke and Heat 311 Termination 802 VIBRATION CONTROL DEVICES 301 13 VIOLATIONS 108 n WALL FURNACE 909 WATER HEATERS 916, 1002 WATER PIPING Chapter 12 WIND RESISTANCE 301 15 WOOD -BURNING APPLIANCES Chapter 9 2018 INTERNAT10NAL MECHANICAL CODE® 151 I I I I COTFIghtOo2017ICC ALL RIGHTS RESERVED Awsdby HDOP, Van Cm,(hv dmepf dwood mm).(Qtyof FRmdNmod)O,d,,N=b,,x10081vms ocJM IOZM0 m. oo PAL(PST) Tug tto ( I.i Ag,, ^®,AOICC Nof th,,e,od�oamfw ,,e od�o¢tbyany ,dPartyo, AMb�tmPOo�vsd 9cgle�ss¢ody mpyncg and Mwodwgp�okb¢ed ANYVNAVTHORIVED REPRODUCTION OR DISTRIBUTION ISA VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER 152 2018 INTERNATIONAL MECHANICAL CODE® Clp lght@@2017ICC ALL RIGHTS RESERVED Awsedby HDOP,Cm Cm,(hvdmep,,d—od Pm),(Qtyof PnmdNmod)O,d¢N=b¢x1ooe1vms ocJM 10-0 m. oo PM (PST) L-mmtto S I ( I.—Agffi,—o ,AOICC Nof th,, ,odoSmoo.m�t,,, od,S,00zbyany ,dputyo, AxmboemPOoossd 9ogleuva ody mpyncg andoetwodwgp�okb¢ed ANYVNAVTHORIVED REPROD VCIION ORDISIRIBVTION ISA VIOLATION OP THE PEDERAL COPYRIGHT ACI AND THE LICENSEAGRE EM ENT. AND SUBJECT TO CIVIL AND CRIMINAL PENALTIEETHEREUNDER :]A01Aak16qt1:I_1AT►NOkiAto]W1111i No matter where you are in your building career, put the benefits of ICC Membership to work for you! Membership in ICC connects you to exclusive I -Codes resources, continuing education opportunities and Members -Only benefits that include: Free code opinions from I -Codes experts Free I -Code book(s) or download to new Members' Discounts on I -Code resources, training and certification renewal Posting resumes and job search openings through the ICC Career Center Mentoring programs and valuable networking opportunities at ICC events Free benefits Corporate and Governmental Members: Your staff can receive free ICC benefits too' Savings of up to 25% on code books and training materials and more Put the benefits of ICC Membership to work for you and your career. Visit www.iccsafe.org/mem3 to join now or to renew your Membership. Or call 1-888-ICC-SAFE (422-7233), ext. 33804 to learn more today! A— �oO�,ONOOo�e IS NOa„ON OF „�Em�.�e�N�ANT—„�N�AN�,.R�;��U,II,A—C �, �4 „� I-� bL Benefits of having an ICC-ES PMG Listing IMES PMG offers a lower cost for certification than competitors Expedited certification for all client listings IMES PMG does not conduct warehouse inspections IMES PMG does not charge for additional company listings 4 www.icc-es-pmg.org MOOMMIr 800-423-6587 x7643 IMES will accept test reports from other entities No fee for EPA WaterSense listings and lead law listings No separate file for NSF 61 listings ANSI and SCC Accredited ic N'ater5enu c PMG 11-I409 A-.1� � .� mRa �d � .� P� I-�o�mo�oso�e ISANoa OF ffEm��e���— II--A—�j��waA--�� �— �� ICC Plan Review Services... � , For the most detailed and precise CODE OUNCII plan Reviews in the industry CODE COUNCIL• Ever wonder why code officials, architects and other building professionals value and accept ICC plan reviews? • Experience — Our I -Code experts have expertise In ALL the International Codes° (I -Codes°) • Detailed Report— Identifies code deficiencies found • Complimentary re -review of reissued plans" Plus, ICC Plan Review Services has over 200 years of combined experience with applications of the codes, 6 registered design professionals on staff and 120 International Code Council Certifications, so you can be assured that ICC will deliver the most detailed and precise plan reviews in the industry. 'Applies to "Complete Plan Review Services" Contact ICC Plan Review staff for details 1714W6 Co I@M11-- MISTS— x v ure �dFmti-nm o(CI,,4( N ,S­Nmvh a J. ­—M Q511Iv ,1 —x-.1 wA xI .� m .m mm4mgemly Peaeodorn— IS— IS mouvox oe'=e aoexuaxixcixem­aorsexas¢amnrt am STJSj 0wd ArTC-P­ Valuable Guides to Changes in the 2018 I -Codes° 1�►� SIGNIFICANT CHANGES TO THE 2018 INTERNATIONAL CODES" Practical resources that offer a comprehensive analysis of the critical changes made between the 2015 and 2018 editions of the codes Authored by ICC code experts, these useful tools are "must -have" guides to the many important changes in the 2018 International Codes Key changes are identified then followed by in-depth, expert discussion of how the change affects real world application A full -color photo, table or illustration is included for each change to further clarify application SIGNIFICANT CHANGES TO THE IBC, 2018 EDITION 47024S18 SIGNIFICANT CHANGES TO THE IRC, 2018 EDITION 47101S18 SIGNIFICANT CHANGES TO THE IFC, 2018 EDITION 47404S18 SIGNIFICANT CHANGES TO THE IPCAMC/IFGC, 2018 EDITION 47202S18 ORDER YOUR HELPFUL GUIDES TODAY! 1-800-786-4452 1 www.iccsafe.org/books I-o�—SA —�osoIS �e�,oN S�A-oE=­ I----- A—�;— CIVaA—C— I —