The 2016 edition of the California Mechanical Code (CMC©) represents the most current approaches in the mechanical field. This code is embedded with the 2015 Edition of the Uniform Mechanical Code (UMC©) with the California amendments. It is the fifth edition developed under the American National Standards Institute (ANSI) process. Contributions to the content of this code were made by every segment of the built industry, including such diverse interests as consumers, enforcing authorities, installers/maintainers, labor, manufacturers, research/standards/ testing laboratories, special experts, and users. The CMC provides complete requirements for the installation and maintenance of heating, ventilating, cooling and refrigeration systems, while at the same time allowing latitude for innovations and new technologies. Key changes to the 2016 CMC include: New general requirements for condensate wastes and control, installation of appliances on sloped roofs, and clearances to combustible constructions (Chapter 3). New ventilation provisions, such as the classification of recirculated and transferred air, parking garages exhaust, and natural ventilation (Chapter 4). New exhaust provisions for clothes dryers, Type I hoods and grease ducts, dishwashing machines, and downdraft appliances (Chapter 5). New duct systems requirements for Factory-made air ducts, plastic ducts, and for ducts used in underground installations (Chapter 6). New appliances provisions, such as electric duct heaters, electric ranges, refrigeration appliances, and ductless mini-split systems (Chapter 9). New refrigeration system requirements, such as the refrigeration concentration limit, ventilation for refrigeration machinery rooms, pressure vessels, and pressure relief valve discharge (Chapter 11). New hydronic systems provisions (Chapter 12).

PDF Catalog

PDF Pages	PDF Title
2	Preface
4	Acknowledgements
5	California Code of Regulations Title 24 California Agency Information Contact List
6	How to Distinguish Between Model Code Language and California Amendments
8	California Matrix Adoption Tables
10	How to Distinguish Model Code Language from California Amendments
12	Foreword
13	Format of the Uniform Mechanical Code
18	Committee on Uniform Mechanical Code
19	Section Relocation
23	Related Publications and Services
26	Table of Contents Chapter 1 Division I California Administration Chapter 1 Division II Administration
27	Chapter 2 Defintions Chapter 3 General Regulations
29	Chapter 4 Ventilation Air
30	Chapter 5 Exhaust Systems
31	Chapter 6 Duct Systems
32	Chapter 7 Combustion Air Chapter 8 Chimneys and Vents
33	Chapter 9 Installation of Specific Appliances
36	Chapter 10 Boilers and Pressure Vessels
37	Chapter 11 Refrigeration
39	Chapter 12 Hydronics
41	Chapter 13 Fuel Gas Piping
42	Chapter 14 Process Piping
43	Chapter 15 Solar Energy Systems Chapter 16 Stationary Power Plants Chapter 17 Referenced Standards Appendices Table of Contents Appendix A Residential Plan Examiner Review Form for HVAC System Design Appendix B Procedures to be Followed to Place Gas Equipment in Operation Appendix C Installation and Testing of Oil (Liquid) Fuel-Fired Equipment Appendix D Fuel Supply: Manufactured/Mobile Home Parks and Recreational Vehicle Parks Appendix E Sustainable Practices Appendix F Sizing of Venting Systems and Outdoor Combustion and Ventilation Opening Design Appendix G Example Calculation of Outdoor Air Rate. Index
44	Chapter 1 Division I Administration
46	1.1.0 General. 1.1.1 Title. 1.1.2 Purpose. 1.1.3 Scope. 1.1.3.1 Nonstate-Regulated Buildings, Structures, and Applications. 1.1.3.2 State-Regulated Buildings, Structures, and Applications.
47	1.1.4 Appendices. 1.1.5 Referenced Codes. 1.1.6 NonBuilding Standards, Orders and Regulations. 1.1.7 Order of Precedence and Use. 1.1.7.1 Differences. 1.1.7.2 Specific Provisions. 1.1.7.3 Conflicts. 1.1.8 City, County, or City and County Amendments, Additions or Deletions.
48	1.1.8.1 Findings and Filings: 1.1.8.2 Locally Adopted Energy Standards – California Energy Code, Part 6. 1.1.9 Effective Date of This Code. 1.1.10 Availability of Codes. 1.1.11 Format. 1.1.12 Validity. 1.2.0 Building Standards Commission. 1.2.1 BSC.
49	1.2.2 Alternative Materials, Design, and Methods Of Construction and Equipment. 1.2.2.1 State Building. 1.2.2.2 Enforcement. 1.2.2.3 Enforcement, Reserved for DGS. 1.2.2.4 Adopting Agency Identification. 1.2.3 BSC-CG. 1.2.3.1 Research Reports. 1.2.3.2 Tests. 1.3.0 Reserved for Corrections Standards Authority. 1.4.0 Department of Consumer Affairs. 1.4.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated. 1.4.2 Adopting Agency Identification. 1.5.0 Reserved for California Energy Commission. 1.6.0 Reserved for Department of Food and Agriculture.
50	1.7.0 California Department of Public Health. 1.7.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated. 1.7.2 Adopting Agency Identification. 1.8.0 Department of Housing and Community Development (HCD). 1.8.1 Purpose. 1.8.2 Authority and Abbreviations. 1.8.2.1 General. 1.8.2.1.1 Housing Construction. 1.8.2.1.2 Housing Accessibility.
51	1.8.2.1.3 Permanent Buildings in Mobilehome Parks and Special Occupancy Parks. 1.8.3 Local Enforcing Agency. 1.8.3.1 Duties and Powers. 1.8.3.2 Laws, Rules, and Regulations. 1.8.3.2.1 State Housing Law. 1.8.3.2.2 Mobilehome Parks Act. 1.8.3.2.3 Special Occupancy Parks Act.
52	1.8.3.2.4 Employee Housing Act. 1.8.3.2.5 Factory-Built Housing Law. 1.8.4 Permits, Fees, Applications, and Inspections. 1.8.4.1 Permits. 1.8.4.2 Fees. 1.8.4.3 Plan Review and Time Limitations. 1.8.4.3.1 Retention of Plans. 1.8.4.4 Inspections. 1.8.5 Right of Entry for Enforcement. 1.8.5.1 General.
53	1.8.6 Local Modification by Ordinance or Regulation. 1.8.6.1 General. 1.8.6.2 Findings, Filings, and Rejections of Local Modifications. 1.8.7 Alternate Materials, Designs, Tests, and Methods of Construction. 1.8.7.1 General. 1.8.7.2 Local Building Departments. 1.8.7.2.1 Approval of Alternates.
54	1.8.7.3 Department of Housing and Community Development. 1.8.8 Appeals Board. 1.8.8.1 General. 1.8.8.2 Definitions. 1.8.8.3 Appeals. 1.8.9 Unsafe Buildings or Structures. 1.8.9.1 Authority to Enforce. 1.8.9.2 Actions and Proceedings.
55	1.8.10 Other Building Regulations. 1.8.10.1 Existing Structures. 1.8.10.2 Moved Structures. 1.9.0 Division of the State Architect. 1.9.1 Reserved for the Division of the State Architect –Access Compliance 1.9.2 Division of the State Architect – Structural Safety. 1.9.2.1 Adopting Agency Identification. 1.9.2.2 DSA-SS Division of the State Architect – StructuralSafety. 1.9.2.3 Adopting Agency Identification. 1.9.2.4 DSA-SS/CC Division of the State Architect –Structural Safety/Community Colleges. 1.10.0 Office of Statewide Health Planning and Development. 1.10.1 OSHPD 1.
56	1.10.1.1 Applicable Administrative Standards: 1.10.1.2 Applicable Building Standards. 1.10.1.3 Adopting Agency Identification. 1.10.2 OSHPD 2. 1.10.2.1 Applicable Administrative Standards: 1.10.2.2 Applicable Building Standards. 1.10.2.3 Adopting Agency Identification. 1.10.3 OSHPD 3. 1.10.3.1 Applicable Administrative Standards. 1.10.3.2 Applicable Building Standards. 1.10.3.3 Adopting Agency Identification. 1.10.4 OSHPD 4. 1.10.4.1 Applicable Administrative Standards: 1.10.4.2 Applicable Building Standards.
57	1.10.4.3 Adopting Agency Identification. 1.11.0 Office of the State Fire Marshal. 1.11.1 SFM – Office of the State Fire Marshal.
58	1.11.2 Duties and Powers of the Enforcing Agency. 1.11.2.1 Enforcement. 1.11.2.1.1 The responsibility for enforcement o fbuilding standards adopted by the State Fire Marshal and published in the California Building Standards Code relating to fire and panic safety and other regulations of the State Fire Marshal shall except as provided in Section 1.11.2.1.2 be as follows: 1.11.2.1.2 Pursuant to Health and Safety Code Section 13108, and except as otherwise provided in this section, building standards adopted by the State Fire Marshal published in the California Building Standards Code relating to fire and panic safety shall be enforced by the State Fire Marshal in all state-owned buildings, state-occupied buildings, and state institutions throughout the state. 1.11.2.1.3 Pursuant to Health and Safety Code Section 13112, any person who violates any order, rule or regulation of the State Fire Marshal is guilty of a misdemeanor punishable by a fine of not less than $100.00 or more than $500.00, or by imprisonment for not less than six months, or by both.
59	1.11.2.2 Right of Entry. 1.11.2.3 More Restrictive Fire and Panic Safety Building Standards. 1.11.2.3.1 Any fire protection district organized pursuant to Health and Safety Code Part 2.7 (commencing with Section 13800) of Division 12 may adopt building standards relating to fire and panic safety that are more stringent than those building standards adopted by the State Fire Marshal and contained in the California Building Standards Code. 1.11.2.3.2 Any fire protection district that proposes to adopt an ordinance pursuant to this section shall, not less than 30 days prior to noticing a proposed ordinance for public hearing, provide a copy of that ordinance, together with the adopted findings made pursuant to Section 1.11.2.3.1, to the city, county, or city and county where the ordinance will apply. 1.11.2.3.3 The fire protection district shall transmit the adopted ordinance to the city, county, or city and county where the ordinance will apply. 1.11.2.4 Request for Alternate Means of Protection. 1.11.2.5 Appeals.
60	1.11.3 Construction Documents. 1.11.3.1 Public Schools. 1.11.3.2 Movable Walls and Partitions. 1.11.3.3 New Construction High-Rise Buildings: 1.11.3.4 Existing High-Rise Buildings: 1.11.3.5 Retention of Plans. 1.11.4 Fees. 1.11.4.1 Other Fees. 1.11.4.2 Large Family Day Care. 1.11.4.3 High-Rise. 1.11.4.4 Fire Clearance Preinspection. 1.11.4.5 Care Facilities.
61	1.11.4.6 Requests of the Office of the State Fire Marshal. 1.11.5 Inspections. 1.11.5.1 Existing Group I-1 or R Occupancies. 1.11.6 Certificate of Occupancy. 1.11.7 Temporary Structures and Uses. 1.11.8 Service Utilities. 1.11.9 Stop Work Order. 1.11.10 Unsafe Buildings, Structures, and Equipment. 1.11.11 Adopting Agency Identification. 1.12.0 Reserved for the State Librarian. 1.13.0 Reserved for the Department of Water Resources. 1.14.0 Reserved for the State Lands Commission.
62	Chapter 1 Division II Administration 101.0 General. 101.1 Title. 101.2 Scope. 101.3 Purpose. 101.4 Unconstitutional. 101.5 Validity. 102.0 Applicability. 102.1 Conflicts Between Codes. 102.2 Existing Installations. 102.3 Maintenance. 102.3.1 Commercial HVAC Systems. 102.3.2 Residential HVAC Systems. 102.4 Additions, Alterations, Renovations, or Repairs. 102.5 Health and Safety. 102.6 Changes in Building Occupancy. 102.7 Moved Structures.
63	102.8 Appendices. 103.0 Duties and Powers of the Authority Having Jurisdiction. 103.1 General. 103.2 Liability. 103.3 Applications and Permits. 103.3.1 Licensing. 103.4 Right of Entry. 104.0 Permits. 104.1 Permits Required. 104.2 Exempt Work. 104.3 Application for Permit.
64	104.3.1 Construction Documents. 104.3.2 Plan Review Fees. 104.3.3 Time Limitation of Application. 104.4 Permit Issuance. 104.4.1 Approved Plans or Construction Documents. 104.4.2 Validity of Permit. 104.4.3 Expiration.
65	104.4.4 Extension. 104.4.5 Suspension or Revocation. 104.4.6 Retention of Plans. 104.5 Fees. 104.5.1 Work Commencing Before Permit Issuance. 104.5.2 Investigation Fees. 104.5.3 Fee Refunds. 105.0 Inspections and Testing. 105.1 General. 105.2 Required Inspections. 105.2.1 Uncovering. 105.2.2 Other Inspections. 105.2.3 Inspection Requests.
66	105.2.4 Advance Notice. 105.2.5 Responsibility. 105.2.6 Reinspections. 105.3 Testing of Systems. 105.3.1 Defective Systems. 105.3.2 Retesting. 105.3.3 Approval. 105.4 Connection to Service Utilities. 106.0 Violations and Penalties. 106.1 General. 106.2 Notices of Correction or Violation. 106.3 Penalties. 106.4 Stop Orders.
67	106.5 Authority to Disconnect Utilities in Emergencies. 106.6 Authority to Condemn. 107.0 Board of Appeals. 107.1 General. 107.2 Limitations of Authority.
68	TABLE Table 104.5 Mechanical Permit Fees
70	Chapter 2 Definition
72	201.0 General. 201.1 Applicability. 202.0 Definition of Terms. 202.1 General. 203.0 – A –
73	204.0 – B –
74	205.0 – C –
76	206.0 – D –
77	207.0 – E – 208.0 – F –
78	209.0 – G – 210.0 – H –
79	211.0 – I –
80	212.0 – J – 213.0 – K – 214.0 – L –
81	215.0 – M – 216.0 – N – 217.0 – O –
82	218.0 – P –
83	219.0 – Q – 220.0 – R –
84	221.0 – S – 222.0 – T –
85	223.0 – U – 224.0 – V –
86	225.0 – W – 226.0 – X – 227.0 – Y – 228.0 – Z –
88	Chapter 3 General Regulations
90	301.0 General. 301.1 Applicability. 301.2 Approval. 301.3 Design of Equipment. 301.4 Electrical Connections. 301.5 Oil-Burning Appliances. 301.6 Personnel Protection. 302.0 Materials – Standards and Alternates. 302.1 Minimum Standards. 302.1.1 Marking. 302.1.2 Standards. 302.1.3 Existing Buildings. 302.2 Alternate Materials and Methods of Construction Equivalency. TABLES FIGURES
91	302.2.1 Testing. 302.2.1.1 Tests. 302.2.1.2 Request by the Authority Having Jurisdiction. 302.3 Alternative Engineered Design. 302.3.1 Permit Application. 302.3.2 Technical Data. 302.3.3 Design Documents. 302.3.4 Design Approval. 302.3.5 Design Review. 302.3.6 Inspection and Testing. 303.0 Installation. 303.1 Listed Appliances. 303.2 Closet or Alcove Installations. 303.3 Unlisted Appliances. 303.4 Anchorage of Appliances. 303.5 Movement.
92	303.6 Identification of Equipment. 303.7 Liquefied Petroleum Gas Facilities. 303.7.1 Liquefied Petroleum Gas Appliances. 303.8 Equipment and Appliances on Roofs. 303.8.1 Load Capacity. 303.8.2 Fasteners. 303.8.3 Installation of Equipment and Appliances on Roofs. 303.8.4 Clearance. 303.8.5 Electrical Power. 303.8.6 Platform or Walkway. 303.9 Avoiding Strain on Gas Piping. 303.10 Clearances. 303.10.1 Clearance Reduction. 304.0 Accessibility for Service. 304.1 General. 304.2 Sloped Roof. 304.3 Access to Equipment and Appliances on Roofs. 304.3.1 Access.
93	304.3.1.1 Access Type. 304.3.1.2 Permanent Ladders. 304.3.2 Permanent Lighting. 304.4 Appliances in Attics and Under-Floor Spaces. 304.4.1 Length of Passageway. 304.4.2 Width of Passageway. 304.4.3 Work Platform. 304.4.4 Lighting and Convenience Outlet. 305.0 Location. 305.1 Installation in Garages. 305.1.1 Physical Damage. 305.1.2 Access from the Outside. 305.1.3 Cellulose Nitrate Plastic Storage. 305.2 Flood Hazard Areas. 305.2.1 Coastal High Hazard Areas.
94	305.2.2 Air Exhaust and Intake Openings. 305.3 Elevator Shaft. 305.4 Drainage Pan. 306.0 Automatic Control Devices. 306.1 General. 307.0 Labeling. 307.1 Fuel-Burning Appliances. 307.2 Electric Heating Appliances. 307.3 Heat Pump and Electric Cooling Appliances.
95	307.4 Absorption Units. 308.0 Improper Location. 308.1 General. 309.0 Workmanship. 309.1 Engineering Practices. 309.2 Concealing Imperfections. 309.3 Installation Practices. 310.0 Condensate Wastes and Control. 310.1 Condensate Disposal. 310.1.1 Condensate Pumps. 310.2 Condensate Control. 310.2.1 Protection of Appurtenances. 310.3 Condensate Waste Pipe Material and Sizing. Table 310.3 Minimum Condensate Pipe Size
96	310.3.1 Cleanouts. 310.4 Appliance Condensate Drains. 310.5 Point of Discharge. 310.6 Condensate Waste From Air-Conditioning Coils. 310.7 Plastic Fittings. 311.0 Heating or Cooling Air System. 311.1 Source. 311.2 Air Filters. 311.3 Prohibited Source. 311.4 Return-Air Limitations. 312.0 Plumbing Connections. 312.1 General.
97	313.0 Hangers and Supports. 313.1 General. 313.2 Material. 313.3 Suspended Piping. 313.4 Alignment. 313.5 Underground Installation. 313.6 Hanger Rod Sizes. 313.7 Gas Piping. 314.0 Balancing. 314.1 General. 315.0 Louvers in Hurricane Prone Regions. 315.1 General. 315.1.1 Testing. 315.1.2 Impact Resistance Test. 316.0 Protection of Piping, Tubing, Materials, and Structures. 316.1 General. 316.2 Installation. 316.3 Corrosion, Erosion, and Mechanical Damage. 316.4 Protectively Coated Pipe. 316.5 Fire-Resistant Construction. 316.6 Steel Nail Plates. 316.7 Sleeves. 316.7.1 Building Loads. Table 313.6 Hanger Rod Sizes
98	316.7.2 Exterior Walls. 316.8 Firewalls. 316.9 Structural Members. 316.10 Rodentproofing. 316.11 Metal Collars. 317.0 Trenching, Excavation, and Backfill. 317.1 Trenches. 317.2 Tunneling and Driving. 317.3 Open Trenches. 317.4 Excavations. 318.0 Scope. 318.1 Applicability. 318.2 Services/Systems and Utilities. 319.0 Steam and Hot-Water Systems. 319.1 Requirements for Hospitals and Optional Services Provided in Correctional Treatment Centers. 319.1.1 Boilers shall have the capacity, based upon the rest ratings published by the Hydronics Institute or another acceptable national standard to supply the normal operating requirements of all connected systems and equipment. 319.1.2 A minimum of two boilers shall be provided. 319.1.3 Boiler systems providing space heating shall be designed to maintain a minimum temperature of 60°F (15.6°C) in general patient areas and the temperatures specified in Table 320.0 for sensitive areas during periods of breakdown or maintenance of any one boiler. 319.1.4 Boiler feed pumps, condensate return pumps, fuel oil pumps, and heating circulating pumps shall be connected and installed to provide standby service in the event of pump failure. 319.1.5 At least two sources of heat (e.g. two pieces of equipment) shall be provided for supplying essential services such as sterilizers, hot water for dishwashing, and domestic hot water for minimum patient service, such as handwashing and baths. 319.2 Requirements for Skilled Nursing, Intermediate Care Facilities and Basic Services Provided in Correctional Treatment Centers. 319.2.1 Boilers, if provided, shall accommodate Section 319.1. 319.2.2 Two or more interconnected water heaters are an acceptable means to provide two sources of heat for hot water (See Section 319.1.5).
99	320.0 Air Conditioning and Heating Systems. 320.1 Requirements for Hospitals and Optional Services Provided in Correctional Treatment Centers. 320.1.1 The systems shall be designed to provide the temperatures and relative humidity for sensitive areas or rooms shown in Table 320.0. 320.1.2 For occupied areas not shown in Table 320.0, heating systems shall be designed to provide 70°F to 75°F (21.1°C to 23.9°C) based on the Climatic Design Data in the most recent version of ASHRAE Handbook-Fundamentals. 320.1.3 For occupied areas not shown in Table 320.0, cooling systems shall be designed to provide 75°F (23.9°C) maximum based on the 0.4 percent summer design dry bulb temperatures shown by the Climatic Design Data in the most recent version of ASHRAE Handbook-Fundamentals. 320.2 Requirements for Skilled Nursing, Intermediate Care Facilities and Basic Services Provided in Correctional Treatment Centers. 320.2.1 Systems shall accommodate the provisions of Sections 320.1.2 through 320.1.3. 320.2.2 Where air conditioning is provided, the system shall be thermostatically controlled in one or more zones. 320.3 Requirements for Outpatient Facilities and Licensed Clinics. 320.3.1 The system shall be designed to provide the temperature and humidity’s for sensitive areas for rooms shown in Table 320.0. 321.0 Essential Mechanical Provisions. 321.1 (Does not apply to OSHPD 3 surgical clinic.) All heating equipment necessary to maintain a minimum temperature of 60°F (15.6°) in patient areas which are not specified in Table 320.0. 321.2 All heating equipment necessary to maintain the minimum temperatures for sensitive areas as specified in Table 320.0. 321.3 Equipment necessary for humidification of the areas listed in Table 320.0. 321.4 All supply, return, and exhaust fans required to maintain the positive and negative air balances as required in Table 4-A. 321.5 All control components and control systems necessary for the normal operation of equipment required to have essential electrical power. 321.6 Alarms for airborne infection isolation rooms and protective environment rooms. Table 320.0 Heating, Cooling and Relative Humidity LD Requirements for Sensitive Areas or Rooms
100	Table 303.10.1 Reduction of Clearances with Specified Forms of Protection
101	Figure 303.10.1(1) Extent of Protection Necessary to Reduce Clearances from Gas Appliances or Vent Connectors Figure 303.10.1(2) Wall Protector Clearance Reduction System Figure 303.10.1(3) Masonry Clearance Reduction System
102	Table 313.3 Hangers and Supports
104	Chapter 4 Ventilation Air
106	401.0 General. 401.1 Applicability. 402.0 Ventilation Air. 402.1 Occupiable Spaces. 402.1.1 Construction Documents. 402.1.2 Dwelling. 402.1.3 Ventilation in Health Care Facilities. 402.2 Natural Ventilation. 402.2.1 Floor Area to Be Ventilated. 402.2.1.1 Single Side Opening. 402.2.1.2 Double Side Opening. 402.2.1.3 Corner Openings. 402.2.1.4 Ceiling Height. 402.2.2 Location and Size of Openings. 402.2.3 Control and Accessibility. 402.3 Mechanical Ventilation. TABLES
107	402.4 Outdoor Air Intake Protection. 402.4.1 Weather Protections. 402.5 Bathroom Exhaust Fans. 403.0 Ventilation Rates. 403.1 General. 403.2 Zone Calculations. 403.2.1 Breathing Zone Outdoor Airflow. 403.2.2 Zone Air Distribution Effectiveness. 403.2.3 Zone Outdoor Airflow. 403.3 Single-Zone Systems. 403.4 One Hundred Percent Outdoor Air Systems. 403.5 Multiple-Zone Recirculating Systems. 403.5.1 Primary Outdoor Air Fraction. 403.5.2 System Ventilation Efficiency. 403.5.3 Uncorrected Outdoor Air Intake.
108	403.5.4 Outdoor Air Intake. 403.6 Design for Varying Operating Conditions. 403.6.1 Short-Term Conditions. 403.7 Exhaust Ventilation. 403.7.1 Parking Garages. 403.7.2 Enclosed Parking Garages. 403.7.2.1 Alternative Exhaust Ventilation for Enclosed Parking Garages. 403.7.2.2 Minimum Exhaust Rate. 403.7.2.3 Exhaust Inlet Distribution. 403.7.2.4 Exhaust System Operation.
109	403.8 Dynamic Reset. 403.9 Air Classification and Recirculation. 403.9.1 Class 1 Air. 403.9.2 Class 2 Air. 403.9.3 Class 3 Air. 403.9.4 Class 4 Air. 404.0 Multiple-Zone Systems. 404.1 General. 404.2 Average Outdoor Air Fraction. 404.3 Zone Ventilation Efficiency 404.3.1 Single Supply Systems. 404.3 .2 Secondary-Recirculation Systems.
110	405.0 Evaporative Cooling System for Health Care Facilities. 406.0 Reserved. 407.0 Ventilation System Details. 407.1 General. 407.1.1 All supply-air, return air, and exhaust-air systems shall be mechanically operated and such systems for areas listed in Table 4-A shall be operated continuously. 407.1.2 Fans serving exhaust systems shall be located at the discharge end of the system. 407.1.3 Services/Systems and Utilities. 407.2 Outdoor Air Intakes and Exhaust Outlets. 407.2.1 Outdoor Air Intakes.
111	407.2.2 Exhaust Outlets. 407.2.3 Relief Air Discharge. 407.3 Air Balance. 407.3.1 The ventilation systems shall be designed and balanced to provide the general air balance relationship to adjacent areas, shown in Table 4-A. 407.3.2 Where the variation in static pressure drop across filters is a significant portion of the total pressure drop, static pressure or pressure differential controls or constant volume devices may be required to ensure the maintenance of air balance relationships shown in Table 4-A regardless of filter loading. 407.4 Air Circulation. 407.4.1 Design of the ventilation system shall provide air movement that is generally from clean to less clean areas. 407.4.1.1 Air supplied to operating rooms, cesarean operating rooms, cardiac catheterization labs, cystoscopy rooms, delivery rooms, and nurseries shall be delivered at or near the ceiling of the area served. 407.4.1.2 Room supply air outlets and room recirculation and exhaust air inlets installed in nonsensitive areas shall be located not less than 3 inches (76 mm) above the floor. 407.4.1.3 Corridors shall not be used to convey supply, return, or exhaust air to or from any room if the corridor is required to be of fire resistive construction per the California Building Code. 407.4.1.4 No space above a ceiling may be utilized as an outside-air, relief-air, supply-air, exhaust-air, or return-air plenum. 407.4.1.5 Air from a patient room, exam room, treatment room shall not be transferred to another similar room without first having passed through air filters as required by Table 4-B or Table 4-C. 407.4.1.6 Supply outlets and return and exhaust air 407.5 Variable Air Volume. 407.5.1 Variable Air Volume Systems (VAV). 407.5.1.1 The VAV system shall comply with code requirements for outside air, total air, and pressure relationship through the full range of operation from minimum to maximum. 407.5.1.2 The central return or exhaust fan shall be controlled to accomplish the variable air volume requirements of the individual rooms served by the fan as described in Section 407.5.1.3. 407.5.1.3 Variable air volume for return or exhaust air shall be accomplished by utilizing an automatic modulating damper in the return or exhaust air for each zone.
112	408.0 Filters. 408.1 General. 408.1.1 A filter gauge shall be installed across each filter bank serving central air systems. 408.1.2 Central air-handling systems are defined as any unit requiring duct work on the supply or inlet side that serve more than one room. 408.1.3 Filter banks shall be visually inspected for torn media and bypass in filter frames by means of a flashlight or equivalent, both with fans in operation and stopped. 408.1.4 Central air-handling systems shall be maintained in a reasonably clean condition during construction and shall be cleaned as necessary prior to replacement of temporary filter used during construction to ensure that clean air will be delivered to the occupied spaces. 408.1.5 Filter bank No. 1 shall be located upstream of the air-conditioning equipment. 408.1.6 Filter bank No. 2 and filter bank No. 3 media shall be rigid or supported (noncollapsing type) and shall operate on the principles of impingement, straining, and diffusion. 408.2 Filters for Hospitals. 408.2.1 All air-ventilation systems shall comply with code requirements of this section and shall have filter bank efficiencies as listed in Table 4-B. 408.2.2 Noncentral recirculating air systems providing cooling to high heat producing equipment located in nonsensitive areas shall have a filter with 30 percent average efficiency based on ASHRAE 52.2 or a minimum efficiency reporting value (MERV) of 8 based on ASHRAE 52.2. 408.2.3 Noncentral air systems serving any areas not listed in Table 4-B shall be provided with filter arrangement and efficiency specifically approved by the enforcing agency. 408.2.4 Noncentral recirculating air handling systems, for example, through-the-wall units, fan coil units, and heat pumps may be utilized for single patient rooms of one or more beds. 408.3 Filters for Skilled Nursing Facilities, Intermediate Care Facilities, and Correctional Treatment Centers. 408.3.1 The air ventilation systems shall comply with code requirements of this section for skilled nursing facilities, intermediate care facilities and correctional treatment centers and shall have filter bank efficiencies as listed in Table 4-C. 408.3.2 Noncentral air systems serving single patient rooms of one or more beds shall comply with Table 4-C. 408.3.3 Noncentral recirculating air-handling systems, i.e. through the wall units, may be utilized for each patient room with one or more beds. 408.3.4 Airborne infection isolation rooms, protective environment rooms, and sensitive areas in correctional treatment centers shall comply with Section 408.2. 408.4 Filters for Outpatient Facilities. 408.4.1 The air ventilation systems shall comply with code requirements of this section for outpatient facilities and shall have filter bank efficiencies as listed in Table 4-B. 408.4.2 Noncentral air systems serving individual rooms shall comply with Table 4-B. 409.0 Ducts. 409.1 Ducts which penetrate construction, intended for X-ray or other radiation protection, shall not impair the effectiveness of the protection. 409.2 Duct linings and their use shall meet the requirements of Chapter 6, California Mechanical Code. 409.3 Insulation of Ducts. 409.4 The anchorage and supporting structural elements for airducts shall be designed to withstand the lateral forces as required by the California Building Code, Title 24, Part 2.
113	410.0 Laboratory Ventilating Systems and Hoods. 410.1 Laboratory Ventilating Systems. 410.2 Exhaust Hoods and Safety Cabinets. 410.3 Laboratory Fume Hoods. 410.3.1 General Standard. 410.3.2 Special Standards for Use with Strong Oxidants. 410.3.3 Special Standards for Use with Infectious or Radioactive Materials. 411.0 Kitchen and Dining Areas. 411.1 The air from dining areas may be used to ventilate the food preparation areas only after it has passed through a filter with at least an 80 percent average efficiency based on ASHRAE 52.2 or a minimum efficiency reporting value (MERV) of 13, based on ASHRAE 52.2. 412.0 Boiler, Mechanical, and Electrical Rooms. 412.1 Boiler, heater and electrical equipment rooms shall be provided with outdoor air so as to maintain combustion rates of equipment and temperatures in the rooms and in adjoining areas as rated in this chapter. 412.2 Floor surfaces in occupied spaces above such rooms should not exceed a temperature of 85°F (29.4°C), and suitable insulation may be required. 413.0 Odorous Rooms. 413.1 Rooms in areas where excessive heat or moisture is generated, where objectional odors or dust are present, or where flammable or toxic gases may accumulate, which are used by health facility personnel or patients, shall be provided with exhaust ventilation to change the air a minimum of ten times per hour. 413.2 Kitchen, morgues and laundries located inside a hospital building or skilled nursing facility in which patients are accommodated, or treated, shall be ventilated with exhaust systems which will provide a minimum of ten air changes per hour and prevent odors from entering patient areas. 414.0 Airborne Infection Isolations Rooms. 414.1 Exhaust Systems.
114	414.1.1 Exhaust discharge from fan shall extend at least 7 feet (2134 mm) above the roof and discharge vertically upward. 414.1.2 Exhaust shall discharge above roof level and through an accessible HEPA filter. 414.2 Air Distribution. 415.0 Protective Environment Rooms. 415.1 Air Distribution. 416.0 Alarms – Airborne Infection Isolation Rooms and Protective Environment Rooms. 416.1 An alarm system which is based on static pressure control, volumetric control, or directional flow measurement shall be provided for each isolation room. 416.2 Other acceptable alarm systems will be allowed when designs are specifically approved by the enforcing agency. 416.3 [For OSHPD 4] For correctional treatment centers, the alarm system shall not create false alarms or security hazards. 416.4 Prior to acceptance of the rooms, the alarm system shall be tested and operated to demonstrate to the owner or designated representative that the installation and performance of the system conforms to design intent. 417.0 Testing and Balancing Airborne Infection Isolation Rooms and Protective Environment Rooms. 418.0 Design Requirements for Ethylene Oxide (ETO) Sterilization Areas. 418.1 Air Changes. 418.2 Exhaust Requirements. 418.2.1 All air from the ETO sterilizer equipment room shall be exhausted to the outside by a dedicated system or other approved method. 418.2.2 The exhaust fan for the dedicated system shall be located at the discharge point of the system and identified as ETO Equipment Room Exhaust. 418.2.3 Discharge Point.
115	418.3 Ventilation Requirements. 418.3.1 Aeration Units. 418.3.2 Capture Box. 418.3.3 Cylinder Change. 418.3.4 Sterilizer Relief Valve. 418.3.5 Ventilation of Sterilizer Door Area. 418.4 Gas Valves. 418.5 Alarm Systems.
116	Table 4-A Pressure Relationship and Ventilation Requirements for General Acute Care Hospitals, Skilled Nursing Facilities, Intermediate Care Facilities, Correctional Treatment Centers, Outpatients Facilities, and Licensed Clinics
119	Table 4-B Filter Efficiencies for Central Ventilation and Air-Conditioning Systems in General Acute Care Hospitals, Acute Psychiatric Hospitals, Outpatient Facilities, and Licensed Clinics Table 4-C Filter Efficiencies for Central Ventilation and Air-Conditioning Systems in Skilled Nursing Facilities and Intermediate Care Facilities and Correctional Treatment Centers
120	Table 402.1 Minimum Ventilation Rates in Breathing Zone
122	Table 403.2.2 Zone Air Distribution Effectiveness Table 403.5.2 System Ventilation Efficiency
123	Table 403.7 Minimum Exhaust Rates
124	Chapter 5 Exhaust Systems
126	501.0 General. 501.1 Applicability. 502.0 Termination. 502.1 Exhaust Opening Protection. 502.2 Termination of Exhaust Ducts. 502.2.1 Environmental Air Ducts. 502.2.2 Product Conveying Ducts. 502.2.3 Commercial Kitchen Ducts. Part I – Environmental Air Ducts and Product-Conveying Systems. 503.0 Motors, Fans, and Filters. 503.1 General. 503.2 Fans. 503.3 Filters. 503.3.1 Labeling. 504.0 Environmental Air Ducts. 504.1 General. TABLES FIGURES
127	504.1.1 Backdraft Protection. 504.2 Independent Exhaust Systems. 504.3 Domestic Range. 504.4 Clothes Dryers. 504.4.1 Provisions for Makeup Air. 504.4.2 Domestic Clothes Dryers. 504.4.2.1 Length Limitation. 504.4.2.2 Transition Ducts. 504.4.3 Commercial Clothes Dryers. 504.4.3.1 Exhaust Ducts for Type 2 Clothes Dryers.
128	504.4.4 Common Exhaust. 504.4.5 Duct Supports. 504.5 Heat (Energy) Recovery Ventilators. 504.6 Gypsum Wallboard Ducts. 505.0 Product-Conveying Systems. 505.1 General. 505.1.1 Incompatible Materials. 505.1.2 Flammability Limit. 505.1.3 Mechanical Ventilation. 505.2 Penetrations. 505.3 Product-Conveying Ducts Classification.
129	505.4 Minimum Velocities and Circulation. 505.5 Makeup Air. 505.6 Hoods and Enclosures. 505.7 Pharmacies – Compounding Area of Parenteral Solutions. 505.7.1 Pharmacies – Laminar Flow Biological Safety Cabinet. 506.0 Product-Conveying Ducts. 506.1 Materials. Table 505.4 Minimum Duct Design Velocities
130	506.2 Construction. 506.3 Fittings. 506.4 Explosion Venting. 506.5 Supports. 506.5.1 Loads. 506.5.2 Corrosion. 506.5.3 Vibration and Stress. 506.5.4 Expansion and Contraction.
131	Table 506.2(1) Minimum Sheet Metal Thickness for Round Ducts
132	506.6 Fire Protection. 506.7 Duct Clearances. 506.7.1 Spacers and Ties. 506.7.2 Air Circulation. 506.7.3 Wool Batts Insulation.
133	506.7.4 Insulation Board. 506.7.5 Clearance with Wall Protector/Surface. 506.7.6 High Temperature Duct Systems. 506.7.7 Reduced Clearance. 506.7.7.1 Wall Protector. 506.7.7.2 Single Flat Wall. Table 506.2(2) Minimum Sheet Metal Thickness for Rectangular Ducts
134	506.7.7.3 Wall Protectors that Cover Two Walls. 506.8 Protection from Physical Damage. Part II – Commercial Hoods and Kitchen Ventilation. 507.0 General Requirements. 507.1 Exhaust System. 507.2 Listed Devices. 507.2.1 Penetration. 507.3 Clearance. 507.3.1 Listed. 507.3.2 Clearance Reduction. 507.3.2.1 Mineral Wool Batts or Ceramic Fiber Blanket. 507.3.2.2 Field-Applied Grease Duct Enclosure. 507.3.2.3 Zero Clearance.
135	507.3.3 Clearance Integrity. 507.3.3.1 Fire. 507.3.3.2 Required Protection. 507.3.3.3 Protection Methods. 507.3.4 Factory Built. 507.3.5 Field Applied. 507.3.6 Both Field-Applied and Factory Built. 507.3.6.1 Physical Damage. 507.3.6.2 Specification. 507.3.6.3 Clearance Options. 507.3.7 Building and Structural Contact. 507.3.7.1 Corrosion Protection. 507.3.7.2 Zero Clearance. 507.3.8 Clearance Between Duct and Interior Surfaces. 507.4 Drawings. 507.5 Notification of Change.
136	508.0 Hoods. 508.1 Where Required. 508.2 Listed Type I Hood Assemblies. 508.2.1 Listed Ultraviolet Hoods. 508.2.2 Construction of Listed Exhaust Hoods. 508.2.3 Assembly of Listed Exhaust Hoods. 508.3 Construction of Type I Hoods. 508.4 Construction of Type II Hoods. 508.5 Supports. 508.6 Grease Vapor. 508.7 Seams, Joints, and Penetrations. 508.8 Eyebrow-Type Hoods. 508.8.1 Duct Connection. 508.9 Insulation. 508.10 Hood Size.
137	508.10.1 Canopy Size and Location. 508.10.1.1 Capacity of Hoods. 508.10.1.2 Extra-Heavy-Duty Cooking Appliances. 508.10.1.3 Heavy-Duty Cooking Appliances. The 508.10.1.4 Medium-Duty Cooking Appliances. Table 508.10.1.2 Extra Heavy-Duty Cooking Appliance Airflow Table 508.10.1.3 Heavy-Duty Cooking Appliance Airflow Table 508.10.1.4 Medium-Duty Cooking Appliance Airflow Figure 508.8 Typical Section of Eyebrow-Type Hood
138	508.10.1.5 Light-Duty Cooking Appliances. 508.10.1.6 Dishwashing Appliances. 508.10.2 Noncanopy-Type Hoods. 508.10.2.1 Installation. 508.10.2.2 Capacity. 508.10.3 Labeling. 508.11 Exhaust Hood Assemblies with Integrated Supply-Air Plenums. 508.11.1 Outer Shell. 508.11.2 Inner Shell. 508.11.3 Fire Dampers. 508.11.3.1 Listing. 508.11.3.2 Actuating Temperature. 508.11.3.3 Exemption. 508.12 Solid-Fuel Hood Assemblies. 508.13 Exhaust Outlets. 509.0 Grease Removal Devices in Hoods. 509.1 Grease Removal Devices. 509.1.1 Grease Filters, Mesh-Type. 509.2 Installation. 509.2.1 Vertical Distance. Table 508.10.1.5 Light-Duty Cooking Appliance Airflow
139	509.2.2 Grease Removal Device Protection. 509.2.2.1 Installation. 509.2.2.2 Size and Location. 509.2.2.3 Clearance. 509.2.3 Grease Filters. 509.2.3.1 Arrangement. 509.2.3.2 Accessibility. 509.2.3.3 Angled Installation. 509.2.3.4 [DPH] Grease filters shall be Class I when tested in accordance with the test method in SFM 12-71-1. 509.2.4 Grease Drip Trays. 509.2.4.1 Size and Pitch. 509.2.5 Grease Filter Orientation. 509.3 Solid-Fuel Grease Removal Devices. 510.0 Exhaust Duct Systems. 510.1 General. 510.1.1 Fire Hazards. 510.1.2 Interconnection. 510.1.3 Duct Installation. 510.1.4 Accessibility. 510.1.5 Sign.
140	510.1.6 Bracing and Supports. 510.1.7 Type II Exhaust Duct Systems. 510.1.8 Type I Exhaust Duct Systems. 510.2 Clearance. 510.3 Openings. 510.3.1 Access Panel. 510.3.2 Access for Cleaning and Inspection. 510.3.3 Horizontal Ducts. 510.3.3.1 Cleaning. 510.3.3.2 Safe Access and Work Platform. 510.3.3.3 Support. 510.3.4 Vertical Ducts. 510.3.4.1 Access. 510.3.4.2 Safe Access and Work Platform. 510.3.5 Nonlisted Ductwork. 510.3.6 Access Panels. 510.3.6.1 Within an Enclosure. 510.3.7 Fire Protection System Devices. 510.4 Listed Grease Ducts. 510.4.1 Factory-Built Grease Ducts. 510.5 Other Grease Ducts. 510.5.1 Materials.
141	510.5.2 Factory-Built Grease Ducts. 510.5.3 Installation. 510.5.3.1 Duct Leakage Test. 510.5.3.2 Welded Duct Connection. 510.5.4 Butt Welded Connections. 510.5.5 Telescoping and Bell-Type Connections. 510.5.6 Duct Leakage Test. 510.6 Exterior Installations. 510.6.1 Weather Protection. 510.7 Interior Installations. 510.7.1 Less than Four Stories. 510.7.2 Four Stories or More. 510.7.3 Clearance.
142	Figure 510.5.3 Permitted Duct-to Hood Collar Connection Figure 510.5.3.2(1) Telescoping-Type Duct Connection Figure 510.5.3.2(2) Bell-Type Duct Connection Figure 510.5.3.2(3) Flange with Edge Weld Duct Connection Figure 510.5.3.2(4) Flange with Filled Weld Duct Connection
143	510.7.4 Mechanical and Structural Integrity. 510.7.5 Materials. 510.7.5.1 Protection from Physical Damage. 510.7.5.2 Inspection. 510.7.6 Listed. 510.7.7 Fire Doors. 510.7.8 Ducts with Enclosure(s). 510.8 Underground Installations. 510.8.1 Grease Receptacle. 510.8.2 Cleanouts. 510.9 Termination of Type I Hood Exhaust System. 510.9.1 Rooftop Terminations.
144	510.9.1.1 Listed Flexible Connectors. 510.9.1.2 Inspection and Cleaning. 510.9.2 Wall Terminations. 510.10 Termination of Type II Hood Exhaust System. 510.11 Solid-Fuel Duct Systems. Figure 510.9.1 Upblast Fan Clearances Figure 510.9.2 Exhaust Termination Distance from Frest Air Intake (FAI) or Operable Door or Window
145	511.0 Air Movement. 511.1 Exhaust Fans for Commercial Cooking Operations. 511.1.1 Upblast Fans. 511.1.2 In-Line Exhaust Fans. 511.1.2.1 Accessibility. 511.1.3 Utility Set Exhaust Fans. 511.1.3.1 At the Rooftop. 511.1.3.2 Within the Building. 511.1.3.3 Duct Systems. 511.1.4 Construction. 511.1.5 Openings. 511.1.6 Standard. 511.2 Airflow. 511.2.1 Exceptions. 511.2.2 Exhaust-Air Volumes. 511.2.2.1 Performance Test. 511.2.2.2 Capture and Containment Test.
146	511.2.3 Operation. 511.3 Makeup Air. Figure 511.1.2(1) Typical Section of Duct-To-Fan Connection-Butt Joint Method Figure 511.1.2(2) Typical Section of Duct-To-Fan Connection-Overlapping Method Figure 511.1.2(3) Typical Section of Duct-To-Fan Connection–Sealant Method Figure 511.1.2(4) Typical Section of Duct-To-Fan Connection Direct to Fan Inlet Cone Method
147	511.3.1 Air Balance. 511.4 Common Duct (Manifold) Systems. 511.4.1 Connections. 511.4.2 Fire Damper. 511.4.3 Construction and Clearance. 511.4.4 Adjustment. 511.4.5 Adjustment Location. 511.4.6 Bleed Air Duct. 511.4.7 Disconnect. 511.5 Solid-Fuel Air Movement Requirements. 512.0 Auxiliary Equipment. 512.1 Dampers. 512.1.1 Use. 512.2 Electrical Equipment. 512.2.1 Device Installation in Ducts. 512.2.2 Lighting Units. 512.2.3 Concealed Spaces. 512.2.4 Listed Lighting Units. 512.2.5 Standard. 512.3 Other Equipment. 512.3.1 Fire-Extinguishing System. 512.3.2 Air Recirculation. 512.4 Solid-Fuel Auxiliary Equipment.
148	513.0 Fire-Extinguishing Equipment. 513.1 General. 513.1.1 Protection. 513.2 Types of Equipment. 513.2.1 Identification. 513.2.2 Standard. 513.2.4 Modification of Existing Hood Systems. 513.2.4.1 Sealing. 513.2.4.2 Obstructions. 513.2.4.3 System Re-evaluation. 513.2.5 Fixed Baffle Hoods with Water Wash. 513.2.5.1 Domestic Water Supply. 513.2.5.2 Control Valve. 513.2.5.3 Activation. 513.2.5.4 Water-Wash System. 513.2.5.5 Exception. 513.2.5.6 Water Supply.
149	513.2.6 Water Valve Supervision. 513.3 Simultaneous Operation. 513.3.1 Automatic Sprinkler System. 513.3.2 Dry or Wet Chemical Systems. 513.4 Fuel and Electric Power Shutoff. 513.4.1 Steam. 513.4.2 Protection Not Required. 513.4.3 Manual Reset. 513.5 Manual Activation. 513.5.1 Location of Manual Activation Device. 513.5.2 Automatic Sprinkler System 513.5.3 Manual Actuator(s). 513.5.4 Standby Power Supply. 513.6 System Annunciation. 513.6.1 Signaling. 513.7 System Supervision. 513.7.1 Automatic Fire-Extinguishing System. 513.7.2 Supervision. 513.7.3 Listed Water Wash System.
150	513.8 Special Design and Application. 513.8.1 Single Device. 513.9 Review and Certification. 513.10 Installation Requirements. 513.11 Portable Fire Extinguishers. 513.11.1 Other Fire Extinguishers. 513.12 Maintenance. 513.12.1 Permitted Use. 513.13 Solid-Fuel Fire-Extinguishing Equipment. 514.0 Procedures for the Use, Inspection, Testing, and Maintenance of Equipment. 514.1 Operating Procedures. 514.1.1 Filters. 514.1.2 Openings. 514.1.3 Posting of Instructions. 514.1.4 Listing and Manufacturer’s Instructions. 514.1.5 Nonoperational. 514.1.6 Secondary Control Equipment. 514.1.7 Inspection Frequency. 514.2 Inspection, Testing and Maintenance. 514.2.1 Requirements. 514.2.2 Fusible Links and Sprinklers. 514.2.3 Inspection Tag.
151	514.2.4 Temperature-Sensing Elements. 514.2.5 Certification. 514.3 Inspection for Grease Buildup. 514.4 Cleaning of Exhaust Systems. 514.4.1 Removal of Contaminants. 514.4.2 Electrical Switches. 514.4.3 Fire Suppression System. 514.4.4 Inoperable. 514.4.5 Solvents/Cleaning Aids. 514.4.6 Cleaning Chemicals. 514.4.7 Coating. 514.4.8 Access Panels and Cover Plates. 514.4.9 Date of Inspection. 514.4.10 Airflow. 514.4.11 Operable State. 514.4.12 Certification of Service. 514.4.13 Report Provided. 514.4.14 Unclean Area. 514.5 Cooking Equipment Maintenance. 514.5.1 Cleaning. 515.0 Minimum Safety Requirements for Cooking Equipment. 515.1 Cooking Equipment. 515.1.1 Installation. Table 514.3 Schedule of Inspection for Grease Buildup
152	515.1.1.1 Re-evaluation. 515.1.1.2 Prior Location. 515.1.1.3 Minimum Space. 515.1.1.4 Space Not Required. 515.1.1.5 Minimum Height. 515.2 Operating Controls. 516.0 Recirculating Systems. 516.1 General Requirements. 516.2 Design Restrictions. 516.2.1 Gas/Electrically Fueled Cooking Appliances. 516.2.2 Recirculation. 516.2.3 Protection. 516.2.4 Maximum Limits. 516.2.5 Label. 516.2.6 Fire Damper. 516.2.7 Installation of Electrical Wiring.
153	516.2.8 Power Supply. 516.2.9 Listing Evaluation. 516.3 Interlocks. 516.3.1 Airflow Sections. 516.3.2 Filter Component. 516.3.3 ESP Interlocks. 516.3.3.1 Manual Reset. 516.3.4 Airflow Switch or Transducer. 516.4 Location and Application Restrictions. 516.5 Additional Fire Safety Requirements. 516.5.1 Installation Downstream. 516.5.2 Locations. 516.6 Use and Maintenance. 516.6.1 Manufacturer’s Instructions. 516.6.2 Cleaning Schedule. 516.6.3 Hood Plenum and Blower Section Cleaning Schedule. 516.6.4 Inspection of Safety Interlocks. 516.6.5 Inspection. 516.6.6 Maintenance Log. 517.0 Solid-Fuel Cooking Operations. 517.1 Venting Application. 517.1.1 Natural Draft. 517.1.2 System Compliance.
154	517.1.3 Makeup Air System. 517.1.4 Natural Draft Ventilation Systems. 517.1.5 Opening Requirements. 517.1.6 Spark Arresters. 517.2 Location of Appliances. 517.2.1 Prohibited Location. 517.2.2 Flammable Vapors. 517.3 Hoods for Solid-Fuel Cooking. 517.3.1 Separation. 517.3.1.1 Equipment with Solid Fuel for Flavoring. 517.4 Exhaust Systems for Solid-Fuel Cooking. 517.4.1 Hood. 517.4.2 Building Exceeding Four Stories. 517.4.3 Prohibited.
155	517.5 Grease Removal Devices for Solid-Fuel Cooking. 517.5.1 Spark Arrester Devices. 517.5.2 Filters. 517.6 Air Movement for Solid-Fuel Cooking. 517.6.1 Replacement Air. 517.6.2 Operation. 517.7 Fire-Extinguishing Equipment for Solid-Fuel Cooking. 517.7.1 Grease Removal Devices, Hoods, and Duct Systems. 517.7.2 Listed Fire-Extinguishing Equipment. 517.7.3 Rating and Design. 517.7.4 Listing/Class. 517.7.5 Fixed-Water Pipe System. 517.7.6 Fuel Storage. 517.7.7 Auxiliary Fuel. 517.8 Other Safety Requirements.
156	517.8.1 Site-Built Solid Fuel Cooling Appliances. 517.8.2 Additional Devices. 517.8.3 Prohibited. 518.0 Downdraft Appliances. 518.1 General. 518.2 Ventilation System. 518.3 Fire-Extinguishing Equipment. 518.3.1 Integral Fire-Extinguishing System. 518.3.2 Interlocks. 518.4 Airflow Switch or Transducer. 518.4.1 Interlocks. 518.4.2 Manual Reset. 518.5 Surface Materials.
158	Chapter 6 Duct Systems
160	601.0 General. 601.1 Applicability. 601.2 Sizing Requirements. 602.0 Material. 602.1 General. 602.2 Combustibles Within Ducts or Plenums. 602.2.1 Electrical. 602.2.2 Fire Sprinkler Piping. 602.2.3 Pneumatic Tubing. 602.2.4 Loudspeakers and Recessed Lighting. 602.2.5 Discrete Products in Plenums. 602.3 Metal. 602.4 Existing Metal Ducts. 602.5 Gypsum.
161	602.6 Factory-Made Air Ducts. 602.6.1 Flexible Ducts. 602.7 Vibration Isolators. 602.8 Corridors. 603.0 Installation of Ducts. 603.1 General. 603.2 Under Floor or Crawl Space. 603.3 Metal Ducts. 603.3.1 Rectangular Ducts. 603.3.2 Horizontal Round Ducts. 603.3.2.1 Tight-Fitting Around the Perimeter. 603.3.2.2 Size of Circular Bands. 603.3.2.3 Connection. 603.3.3 Earthquake Loads. 603.4 Factory-Made Air Ducts and Connectors. 603.4.1 Length Limitation. 603.5 Flexible Air Ducts and Connectors. 603.6 Plastic Ducts. 603.7 Protection of Ducts.
162	603.8 Support of Ducts. 603.9 Protection Against Flood Damage. 603.10 Joints and Seams of Ducts. 603.11 Cross Contamination. 603.12 Underground Installation. 604.0 Insulation of Ducts. 604.1 General. 604.1.1 Within Ducts or Plenums. 604.1.2 Duct Coverings and Linings. 604.2 [OSHPD 1, 2, 3 (surgical clinics) & 4] Thermalacoustical lining materials shall not be installed within ducts, terminal boxes, sound traps, and other in-duct systems serving areas such as operating, cesarean operating rooms, delivery rooms, post anesthesia care units, cystoscopy, cardiac catheterization labs, nurseries, intensive care units, newborn intensive care units, and airborne infection isolation rooms unless terminal filters with 90 percent average efficiency based on ASHRAE Standard 52.2 or minimum efficiency rating value (MERV) of 14 are installed downstream of the duct lining. 604.3 [OSHPD 1, 2 & 4] Thermal or acoustical lining materials shall not be installed within ducts which are downstream of the 99.97 percent high-efficiency particulate air (HEPA) filter or with minimum efficiency rating value (MERV) of 17 required in Section 408.2.1 for protective environment rooms.
163	605.0 Smoke Dampers, Fire Dampers, and Ceiling Dampers. 605.1 Smoke Dampers. 605.2 Fire Dampers. 605.3 Ceiling Radiation Dampers. 605.4 Multiple Arrangements. 605.5 Access and Identification. 605.6 Freedom from Interference. 605.7 Temperature Classification of Operating Elements. 605.8 When the automatic activation of a smoke damper or a combination smoke-fire damper occurs, the HVAC system serving such dampers shall immediately shut down. 606.0 Ventilating Ceilings. 606.1 General. 606.2 Requirements. 607.0 Use of Under-Floor Space as Supply Plenum for Dwelling Units. 607.1 General. 607.2 Dwelling Units. 607.3 Enclosed. 607.4 Flammable Materials. 607.5 Access.
164	607.6 Automatic Control. 607.7 Temperature Limit. 607.8 Noncombustible Receptacle. 607.8.1 Location. 607.8.2 Area. 607.8.3 Perimeter. 607.9 Floor Registers. 607.10 Exterior Wall and Interior Stud Partitions. 607.11 Wall Register. 607.12 Distance from Combustible. 607.13 Vapor Barrier. 607.14 Prohibited. 608.0 Automatic Shutoffs. 608.1 Air-Moving Systems and Smoke Detectors.
166	Chapter 7 Combustion Air
168	701.0 General. 701.1 Applicability. 701.1.1 Other Types of Appliances. 701.2 Pressure Difference. 701.3 Makeup Air. 701.4 Indoor Combustion Air. 701.4.1 Standard Method. 701.4.2 Known Air Infiltration Rate Method. 701.5 Indoor Opening Size and Location. 701.6 Outdoor Combustion Air. 701.6.1 Two Permanent Openings Method. FIGURES
169	701.6.2 One Permanent Opening Method. 701.7 Combination Indoor and Outdoor Combustion Air. Figure 701.5 Combustion Air from Adjacent Indoor Spaces through Indoor Combustion Air Openings Figure 701.6.1(1) Combustion Air from Outdoors Inlet Air from Ventilated Crawl Space and Outlet Air to Ventilated Attic Figure 701.6.1(2) Combustion Air from Outdoors through Ventilated Attic
170	701.7.1 Indoor Openings. 701.7.2 Outdoor Openings. 701.7.3 Outdoor Opening(s) Size. 701.8 Engineered Installations. 701.9 Mechanical Combustion Air Supply. 701.9.1 Exhaust Fans. 701.9.2 Interlock. 701.9.3 Specified Combustion Air. 701.10 Louvers, Grilles, and Screens. 701.10.1 Minimum Screen Mesh Size. 701.10.2 Motorized Louvers. Figure 701.6.1(3) Combustion Air from Outdoors through Horizontal Ducts Figure 701.6.2 Combustion Air from Outdoors through Single Combustion Air Opening
171	701.11 Combustion Air Ducts. 701.12 Dampers Prohibited. 702.0 Process Air. 702.1 General. 703.0 Extra Device or Attachment. 703.1 General. 704.0 Bleed Lines for Diaphragm-Type Valves. 704.1 General.
172	Chapter 8 Chimneys and Vents
174	801.0 General. 801.1 Applicability. 801.2 Venting of Gas Appliances. 801.3 Appliances Fueled by Other Fuels. 802.0 Venting of Appliances. 802.1 Listing. 802.1.1 Installation. 802.1.2 Prohibited Discharge. 802.2 Connection to Venting Systems. 802.2.1 Appliances Not Required to be Vented. 802.2.2 Ventilating Hoods. 802.2.3 Well-Ventilated Spaces. 802.2.4 Direct-Vent Appliances. 802.2.5 Appliances with Integral Vents. 802.3 Design and Construction. 802.3.1 Appliance Draft Requirements. 802.3.2 Appliance Venting Requirements. 802.3.3 Mechanical Draft Systems. TABLES FIGURES
175	802.3.3.1 Venting. 802.3.3.2 Leakage. 802.3.3.3 Vent Connectors. 802.3.3.4 Operation. 802.3.3.5 Exit Terminals. 802.3.4 Ventilating Hoods and Exhaust Systems. 802.3.4.1 Automatically Operated Appliance. 802.3.5 Circulating Air Ducts and Furnace Plenums. 802.4 Type of Venting System to be Used. 802.4.1 Plastic Piping. 802.4.2 Plastic Vent Joints. 802.4.3 Special Gas Vent. 802.5 Masonry, Metal, and Factory-Built Chimneys. 802.5.1 Factory-Built Chimneys. Table 802.4 Type of Venting System to be Used
176	802.5.1.1 Decorative Shrouds. 802.5.1.2 Listing Requirements. 802.5.2 Metal Chimneys. 802.5.3 Masonry Chimneys. 802.5.4 Termination. 802.5.4.1 Medium-Heat Gas Appliances. 802.5.4.2 Chimney Height. 802.5.4.3 Decorative Shrouds. Figure 802.5.4 Typical Termination Locations for Chimneys and Single-Wall Metal Pipes Serving Residential-Type and Low-Heat Appliance
177	802.5.5 Size of Chimneys. 802.5.6 Inspection of Chimneys or Vents. 802.5.7 Inspection of Chimneys. 802.5.7.1 Standard. 802.5.7.2 Cleanouts. 802.5.7.3 Existing Chimney. 802.5.8 Chimney Serving Appliances Burning Other Fuels. 802.5.8.1 Gas and Liquid-Fuel-Burning Appliances. 802.5.8.2 Gas and Solid-Fuel-Burning Appliances. 802.5.8.3 Combination Gas- and Oil-Burning Appliances. 802.5.9 Support of Chimneys. 802.5.10 Cleanouts. 802.5.11 Space Surrounding Lining or Vent. 802.5.11.1 Combustion Air.
178	802.6 Gas Vents. 802.6.1 Fasteners. 802.6.2 Termination Requirements. 802.6.2.1 Type B and L Vents. 802.6.2.2 Type B-W Vents. 802.6.2.3 Exterior Wall Termination. 802.6.2.4 Decorative Shrouds. 802.6.2.5 Termination Cap. 802.6.2.6 Forced Air Inlet. 802.6.2.7 Insulation Shield. 802.6.3 Size of Gas Vents. 802.6.3.1 Category I Appliances. Table 802.6.2 Roof Pitch Height Figure 802.6.2 Gas Vent Termination Locations for Listed Caps 12 inches or Less in Size not Less than 8 feet from a Vertical Wall
179	802.6.3.2 Vent Offsets. 802.6.3.3 Category II, Category III, and Category IV Appliances. 802.6.3.4 Sizing. 802.6.4 Gas Vents Serving Appliances on More than One Floor. 802.6.4.1 Occupiable Space. 802.6.4.2 Multistory Venting System. Figure 802.6.4.1 Plan View of Practical Separation Method for Multistory Gas Venting Figure 802.6.4.2 Use of Manifolded Common Vent Connector
180	802.6.5 Support of Gas Vents. 802.6.6 Marking. 802.7 Single-Wall Metal Pipe. 802.7.1 Cold Climate. 802.7.2 Termination. 802.7.3 Installation with Appliances Permitted by Table 802.4. 802.7.3.1 Limitations. 802.7.3.2 Attic or Concealed Space. 802.7.3.3 Incinerator. 802.7.3.4 Clearances. 802.7.3.5 Combustible Exterior Wall. Table 802.7.3.4 Clearance for Connectors
181	802.7.3.6 Roof Thimble. 802.7.4 Size of Single-Wall Metal Pipe. 802.7.4.1 Sizing of Venting System. 802.7.4.2 Non-Round Metal Pipe. 802.7.4.3 Venting Capacity. 802.7.5 Support of Single-Wall Metal Pipe. 802.7.6 Marking. 802.8 Through-the-Wall Vent Termination. 802.8.1 Mechanical Draft Venting System. 802.8.2 Direct-Vent Appliance. 802.8.3 Nuisance and Hazard. 802.8.4 Annular Spaces.
182	802.8.5 Vent Terminals. 802.9 Condensation Drain. 802.9.1 Local Experience. 802.10 Vent Connectors for Category I Appliances. 802.10.1 Materials. 802.10.1.1 Unconditioned Area. 802.10.1.2 Residential Type Appliances. 802.10.1.3 Non-Residential Low-Heat Appliances. 802.10.1.4 Medium-Heat Appliances. Table 802.10.1.3 Minimum Thickness for Galvanized Steel Vent Connectors for Low-Heat Appliances
183	802.10.2 Size of Vent Connector. 802.10.2.1 Manifold. 802.10.2.2 Size. 802.10.2.3 Height. 802.10.2.4 Size Increase. 802.10.3 Two or More Appliances Connected to a Single Vent. 802.10.3.1 Height of Connector. 802.10.3.2 Pressure. 802.10.4 Clearance. 802.10.5 Joints. 802.10.6 Slope. 802.10.7 Length of Vent Connector. Table 802.10.1.4 Minimum Thickness for Steel Vent Connectors for Medium-Heat Appliances and Commercial and Industrial Incinerators
184	802.10.7.1 Single Wall Connector. 802.10.7.2 Type B Double Wall Connector. 802.10.8 Support. 802.10.9 Chimney Connection. 802.10.10 Inspection. 802.10.11 Fireplaces. 802.10.12 Passage through Ceilings, Floors, or Walls. 802.10.12.1 Medium-Heat Appliances. 802.11 Vent Connectors for Category II, Category III, and Category IV Appliances. 802.12 Draft Hoods and Draft Controls. 802.12.1 Installation. 802.12.2 Draft Control Devices. 802.12.3 Additional Devices. 802.12.4 Location. 802.12.5 Positioning. 802.12.6 Clearance.
185	802.13 Manually Operated Dampers. 802.14 Obstructions. 802.15 Automatically Operated Vent Dampers. 802.15.1 Listing. 803.0 Sizing of Category I Venting Systems. 803.1 Single Appliance Vent Table 803.1.2(1) through Table 803.1.2(6). 803.1.1 Vent Downsizing. 803.1.2 Elbows. 803.1.3 Zero Lateral. 803.1.4 High-Altitude Installations. 803.1.5 Multiple Input Ratings. 803.1.6 Corrugated Chimney Liner Reduction.
186	803.1.7 Connection to Chimney Liners. 803.1.8 Vertical Vent Upsizing Using 7 x Rule. 803.1.9 Draft Hood Conversion Accessories. 803.1.10 Chimney and Vent Locations. 803.1.11 Residential and Low-Heat Appliances. 803.1.11.1 Clay Flue Lining. 803.1.11.2 Chimney Lining. 803.1.12 Corrugated Vent Connector Size. 803.1.13 Upsizing. 803.1.14 Single Run of Vent. 803.1.15 Interpolation. 803.1.16 Extrapolation. 803.1.17 Engineering Methods. 803.1.18 Height Entries. 803.2 Multiple Appliance Vent Table 803.2(1) through Table 803.2(9).
187	803.2.1 Vent Connector Maximum Length. 803.2.2 Vent Connector Exceeding Maximum Length. 803.2.3 Vent Connector Manifold. 803.2.4 Vent Offset. 803.2.5 Elbow Reduction. 803.2.6 Common Vent Minimum Size. 803.2.7 Tee and Wye Fittings. 803.2.8 Size of Fittings. Table 803.2.1 Vent Connector Maximum Length
188	803.2.9 High-Altitude Installations. 803.2.10 Connector Rise. 803.2.11 Vent Height. 803.2.12 Multistory Installations. 803.2.13 Size of Vents for Multistory Installations. 803.2.14 Vent Type Multistory Installation. 803.2.15 Offsets in Multistory Installations. Figure 803.2.12 Multistory Gas Vent Design Procedure for Each Segment of System Figure 803.2.13 Principles of Design of Multistory Vents Using Vent Connector and Common Vent Design Tables
189	803.2.16 Vertical Vent Size Limitation. 803.2.17 Multiple Input Ratings. 803.2.18 Corrugated Metallic Chimney Liner Reduction. 803.2.19 Chimneys and Vents. 803.2.20 Vent Connector Sizing. 803.2.21 Combination of Pipe Types and Sizes. 803.2.22 Multiple Connector and Vent Sizes. 803.2.23 Interpolation. 803.2.24 Extrapolation. 803.2.25 Engineering Methods.
190	803.2.26 Height Entries. Figure 803.1.2(6) Range of Winter Design Temperatures Used in Analyzing Exterior Masonry Chimneys in the United States
191	Table 803.1.2(1) Type B Double-Wall Gas Vent [NFPA 54: TABLE 13.1(a)]
194	Table 803.1.2(2) Type B Double-Wall Gas Vent [NFPA 54: TABLE 13.1(b)]
196	Table 803.1.2(3) Masonry Chimney [NFPA 54: TABLE 13.1(c)]
198	Table 803.1.2(4) Masonry Chimney [NFPA 54: TABLE 13.1(d)]
200	Table 803.1.2(5) Single-Wall Metal Pipe or Type B Asbestos-Cement Vent [NFPA 54: TABLE 13.1(e)]
201	Table 803.1.2(6) Exterior Masonry Chimney [NFPA 54: TABLE 13.1(f)]
202	Table 803.2(1) Type B Double-Wall Vent [NFPA 54: TABLE 13.2(a)]
206	Table 803.2(2) Type B Double-Wall Vent [NFPA 54: TABLE 13.2(b)]
208	Table 803.2(3) Masonry Chimney [NFPA 54: TABLE 13.2(c)]
210	Table 803.2(4) Masonry Chimney [NFPA 54: TABLE 13.2(d)]
212	Table 803.2(5) Single-Wall Metal Pipe or Type B Asbestos-Cement Vent [NFPA 54: TABLE 13.2(e)] Table 803.2(6) Exterior Masonry Chimney [NFPA 54: TABLE 13.2(f)]
213	Table 803.2(7) Exterior Masonry Chimney [NFPA 54: TABLE 13.2(g)]
214	Table 803.2(8) Exterior Masonry Chimney [NFPA 54: TABLE 13.2(h)]
215	Table 803.2(9) Exterior Masonry Chimney [NFPA 54: TABLE 13.2(i)]
216	Chapter 9 Installation of Specific Appliances
218	901.0 General. 901.1 Applicability. 902.0 General. 902.1 Nonindustrial Appliance. 902.2 Combustion Air from Bedroom or Bathroom. 902.3 Added or Converted Equipment or Appliances. 902.4 Type of Gas(es). 902.5 Fuel Input Rate. 902.6 Building Structural Members. 902.6.1 Structural Capacity. 902.7 Flammable Vapors. 902.8 Solid-Fuel Burning Appliances. 902.9 Combination of Appliances and Equipment. 902.10 Protection of Gas Appliances from Fumes or Gases Other than Products of Combustion. TABLES FIGURES
219	903.0 Air-Conditioning Appliances. 903.1 Electric Air Conditioners. 903.2 Gas-Fired Air Conditioners and Heat Pumps. 903.2.1 Independent Gas Piping. 903.2.2 Connection of Gas Engine-Powered Air Conditioners. 903.2.3 Clearances for Indoor Installation. 903.2.4 Assembly and Installation. 903.2.5 Furnace Plenums and Air Ducts. 903.2.6 Refrigeration Coils. 903.2.7 Switches in Electrical Supply Line. 904.0 Central Heating Boilers and Furnaces. 904.1 Location. 904.1.1 Self-Closing Doors. 904.1.2 Gasketing.
220	904.2 Clearance. 904.3 Assembly and Installation. 904.3.1 Under-Floor Installation. 904.3.1.1 Supported by Ground. 904.3.1.2 Supported from Above. 904.3.1.3 Excavation. Table 904.2 Clearances to Combustible Material for Unlisted Furnaces, Boilers, and Air Conditioners
221	904.4 Temperature- or Pressure-Limiting Devices. 904.5 Low-Water Cutoff. 904.6 Steam Safety and Pressure-Relief Valves. 904.6.1 Discharge. 904.6.2 Size. 904.6.3 End Connections. 904.7 Furnace Plenums and Air Ducts. 904.8 Refrigeration Coils. 904.9 Cooling Units Used with Heating Boilers. 904.10 Furnace (Upright and Horizontal). 904.11 Solid-Fuel Furnaces. 904.12 Oil-Fired Central Furnaces. 904.13 Commercial or Industrial Gas Heaters.
222	905.0 Duct Furnaces. 905.1 Clearances. 905.2 Installation of Duct Furnaces. 905.3 Access Panels. 905.4 Location of Draft Hoods and Controls. 905.5 Circulating Air. 905.6 Duct Furnaces Used with Refrigeration Systems. 905.7 Installation in Commercial Garages and Aircraft Hangars. 905.8 Installation in Commercial Garages. 905.8.1 Repair Garages. 905.9 Installation in Aircraft Hangars. 905.10 Electric Duct Heaters. 905.10.1 Installation. 905.10.2 Clearance.
223	906.0 Floor Furnaces. 906.1 Installation. 906.2 Temperature Limit Controls. 906.3 Combustion and Circulating Air. 906.4 Placement. 906.5 Bracing. 906.6 Support. 906.7 Clearance. 906.8 Access. 906.9 Seepage Pan. 906.10 Wind Protection. 906.11 Upper-Floor Installations. 906.12 First Floor Installation. 906.13 Oil-Fired Floor Furnaces.
224	907.0 Wall Furnaces. 907.1 Installation. 907.2 Location. 907.3 Combustion and Circulating Air. 907.4 Oil-Fired Wall Furnaces. 908.0 Clothes Dryers. 908.1 Electric Clothes Dryers. 908.2 Gas-Fired Clothes Dryers. 908.2.1 Clearance. Figure 907.1 Installation of Type B-W Gas Vents for Vented Wall Furnaces
225	908.2.2 Exhausting to the Outdoors. 908.2.3 Multiple-Family or Public Use. 909.0 Conversion Burners. 909.1 General. 910.0 Burner Assemblies. 910.1 Oil Burners. 910.2 Gas Burners. 911.0 Decorative Appliances for Installation in Vented Fireplaces. 911.1 Prohibited Installations. 911.2 Installation. 911.3 Fireplace Screens. 912.0 Gas Fireplaces, Vented. 912.1 Reserved. 912.2 Installation. Table 911.2 Free Opening Area of Chimney Damper for Venting Flue Gases from Unlisted Decorative Appliances for Installation in Vented Fireplaces
226	912.3 Combustion and Circulating Air. 913.0 Factory-Built Fireplaces and Fireplace Stoves. 913.1 Factory-Built Fireplaces. 913.1.1 Gasketed Fireplace Doors. 913.2 Fireplace Stoves. 913.3 Fireplace Accessories. 914.0 Non-Recirculating Direct Gas-Fired Industrial Air Heaters. 914.1 Application. 914.2 Prohibited Installations. 914.3 Installation. 914.4 Clearance from Combustible Materials. 914.5 Air Supply. 914.6 Atmospheric Vents, Gas Reliefs, or Bleeds. 914.7 Relief Openings. 914.8 Purging. 915.0 Recirculating Direct Gas-Fired Industrial Air Heaters. 915.1 Application. 915.2 Prohibited Installations.
227	915.3 Installation. 915.4 Clearance from Combustible Materials. 915.5 Air Supply. 915.6 Atmospheric Vents, Gas Reliefs, or Bleeds. 915.7 Relief Openings. 915.8 Purging. 916.0 Room Heaters. 916.1 Electric Room Heaters. 916.2 Gas-Fired Room Heaters. 916.2.1 Prohibited Installations. 916.2.1.1 Unvented Room Heaters. 916.2.2 Installations in Institutions. 916.2.3 Clearance.
228	916.2.4 Wall-Type Room Heaters. 916.3 Solid-Fuel-Type Room Heaters. 917.0 Unit Heaters. 917.1 Support. 917.2 Clearance. 917.2.1 Floor-Mounted-Type Unit Heaters. 917.3 Combustion and Circulating Air. 917.4 Ductwork. 917.5 Installation in Commercial Garages and Aircraft Hangars. 917.6 Oil-Fired Unit Heaters. 918.0 Food Service Appliance, Floor Mounted. 918.1 Clearance for Listed Appliances. 918.2 Clearance for Unlisted Appliances. 918.3 Mounting on Combustible Floors.
229	918.4 Installation on Noncombustible Floors. 918.5 Combustible Material Adjacent to Cooking Top. 918.6 Use with Casters. 918.7 Level Installation. 918.8 Ventilation. 919.0 Food Service Appliances, Counter Appliances. 919.1 Vertical Clearance. 919.2 Clearance for Listed Appliances. 919.3 Clearance for Unlisted Appliances. 919.4 Mounting of Unlisted Appliances. 920.0 Hot Plates and Laundry Stoves. 920.1 General.
230	921.0 Household Cooking Appliances. 921.1 Electric Household Cooking Appliances. 921.2 Gas-Fired Household Cooking Appliances. 921.3 Floor-Mounted Units. 921.3.1 Clearance from Combustible Material. 921.3.2 Vertical Clearance Above Cooking Top. 921.4 Built-In Units. 921.4.1 Installation. 921.4.2 Vertical Clearance. 921.4.3 Horizontal Clearance. 921.4.4 Level Installation.
231	922.0 Cooking Appliances Listing. 922.1 Commercial Electric Ranges. 922.2 Commercial Wood-Fired Baking Ovens. 922.3 Oil-Burning Ranges. 923.0 Open-Top Broiler Units. 923.1 Listed Units. 923.2 Unlisted Units. 923.3 Protection Above Domestic Units. 923.4 Commercial Units. 924.0 Outdoor Cooking Appliances. 924.1 Listed Units. 924.2 Unlisted Units. 925.0 Illuminating Appliances. 925.1 Clearances for Listed Appliances. 925.2 Clearances for Unlisted Appliances. 925.2.1 Open-Flame Type. 925.3 Mounting on Buildings. Table 925.2.1 Clearances for Unlisted Outdoor Open-Flame Illuminating Appliances
232	925.4 Mounting on Posts. 925.5 Appliance Pressure Regulators. 926.0 Incinerators and Crematories. 926.1 Field Constructed Commercial-Industrial Incinerators. 926.2 Factory-Built Commercial Crematories. 926.3 Residential Incinerators. 927.0 Infrared Heaters. 927.1 Support. 927.2 Suspended Low-Intensity Infrared Tube Heaters. 927.3 Clearance. 927.4 Combustion and Ventilation Air. 927.5 Installation in Commercial Garages and Aircraft Hangars. 928.0 Pool Heaters. 928.1 Location. 928.2 Clearance. 928.3 Temperature or Pressure-Limiting Devices. 28.4 Bypass Valves.
233	928.5 Venting. 929.0 Refrigerators. 929.1 Clearance. 929.2 Venting or Ventilating Kits Approved for Use with a Refrigerator. 930.0 Gas-Fired Toilets. 930.1 Clearance. 930.2 Installation on Combustible Floors. 930.3 Vents. 931.0 Appliances for Installation in Manufactured Housing. 931.1 General. 932.0 Small Ceramic Kilns. 932.1 General. 932.2 Installation. 932.3 Fuel-Gas Controls. 932.4 Electrical Equipment. 932.5 Installations Inside Buildings. 932.5.1 Kiln Clearances. 932.5.2 Hoods. 932.5.3 Gravity Ventilation Ducts. 932.5.4 Makeup Air.
234	932.5.5 Hood and Duct Clearances. 932.6 Exterior Installations. 933.0 Outdoor Open Flame Decorative Appliances. 933.1 General. 933.1.1 Listed Units. 933.1.2 Unlisted Units. 933.1.3 Connection to the Piping System. 934.0 Evaporative Cooling Systems. 934.1 General. 934.2 Location. 934.3 Access, Inspection, and Repair. 934.4 Installation. 934.4.1 Modifications to the Supporting Structure. 934.4.2 On the Ground. 934.4.3 On a Platform. 935.0 Refrigeration Appliances. 935.1 Self-Contained Refrigerators and Freezers. 935.2 Unit Coolers. 935.3 Self-Contained Mechanical Refrigeration Systems. 936.0 Ductless Mini-Split Systems Installation. 936.1 General. 937.0 Air Filter Appliances. 937.1 Electrostatic Air Cleaners. 937.2 High-Efficiency Particulate Air Filter Units. 938.0 Gaseous Hydrogen Systems. 938.1 General. 939.0 Compressed Natural Gas (CNG) Vehicular Fuel Systems. 939.1 General.
236	Chapter 10 Boilers and Pressure Vessels
238	1001.0 General. 1001.1 Applicability. 1001.2 Boiler Rooms and Enclosures. 1001.3 Air for Combustion and Ventilation. 1001.4 Drainage. 1001.5 Mounting. 1001.5.1 Floors. 1001.6 Chimneys or Vents. 1002.0 Standards. 1002.1 General. 1002.2 Oil-Burning Boilers. 1002.2.1 Listing & Labeling. 1002.2.2 Installation. 1002.3 Electric Boilers. 1002.4 Solid-Fuel Boilers. 1003.0 Detailed Requirements. 1003.1 Safety Requirements. 1003.2 Controls. TABLES
239	1003.2.1 Automatic Boilers. 1003.3 Gauges. 1003.4 Stack Dampers. 1003.5 Welding. 1004.0 Expansion Tanks. 1004.1 General. 1004.2 Open-Type Expansion Tanks. 1004.3 Closed-Type Systems. 1004.4 Minimum Capacity of Closed-Type Tank. Table 1004.4(1) Expansion Tank Capacities for Gravity Hot Water Systems
240	1005.0 Safety or Relief Valve Discharge. 1005.1 General. 1005.2 Discharge Piping. 1005.3 Splash Shield. 1005.4 Hazardous Discharge. 1005.5 Vacuum Relief Valve. 1006.0 Shutoff Valves. 1006.1 General. 1007.0 Gas-Pressure Regulators. 1007.1 General. 1008.0 Low-Water Cutoff. 1008.1 General. 1009.0 Combustion Regulators – Safety Valves. 1009.1 General. 1010.0 Clearance for Access. 1010.1 General. Table 1004.4(2) Expansion Tank Capacities for Forced Hot Water Systems
241	1010.2 Power Boilers. 1010.3 Steam-Heating Boilers, Hot Water Boilers, and Power Boilers. 1010.4 Package Boilers, Steam-Heating Boilers, and Hot-Water-Heating Boilers. 1011.0 Boilers, Stokers, and Steam Generators. 1011.1 General. 1012.0 Operating Adjustments and Instructions. 1012.1 General. 1013.0 Inspections and Tests. 1013.1 General. 1013.2 Operating Permit. 1013.3 Maintenance Inspection. 1013.4 Power and Miniature Boilers. 1013.5 Steam-Heating and Water-Heating Boilers. 1013.6 Automatic Steam-Heating Boilers.
242	1013.7 Unfired Pressure Vessels. 1014.0 Operation and Maintenance of Boilers and Pressure Vessels. 1014.1 General.
243	Table 1003.2.1 Controls and Limit Deivces for Automatic Boilers
246	Chapter 11 Refrigeration
248	1101.0 General. 1101.1 Applicability. 1101.2 Equipment. Part I – Refrigeration Systems. 1102.0 Refrigeration Systems. 1102.1 General. 1102.2 Refrigerants. 1103.0 Classification. 1103.1 Classification of Refrigerants. 1103.2 Classification of Refrigeration Systems. 1103.2.1 High-Probability System. 1103.2.2 Low-Probability System. 1103.3 Higher Flammability Refrigerants. 1104.0 Requirements for Refrigerant and Refrigeration System Use. 1104.1 System Selection. 1104.2 Refrigerant Concentration Limit. 1104.2.1 Volume Calculations. 1104.2.2 Nonconnecting Spaces. TABLES
249	1104.2.3 Ventilated Spaces. 1104.2.3.1 Closures. 1104.2.3.2 Plenums. 1104.2.3.3 Supply and Return Ducts. 1104.3 Institutional Occupancies. 1104.4 Industrial Occupancies and Refrigerated Rooms. 1104.5 Flammable Refrigerants. 1104.6 Applications for Human Comfort and for Nonindustrial Occupancies. 1104.7 Refrigerant Type and Purity. 1104.7.1 Recovered Refrigerants. 1104.7.2 Recycled Refrigerants.
250	1104.7.3 Reclaimed Refrigerants. 1104.7.4 Mixing. 1104.8 Changing Refrigerants. 1105.0 General Requirements. 1105.1 Human Comfort. 1105.2 Supports and Anchorage. 1105.3 Access. 1105.4 Illumination and Service Receptacles. 1105.5 Ventilation of Rooms Containing Condensing Units. 1105.5.1 Permanent Gravity Ventilation Openings. 1105.5.2 Mechanical Exhaust System.
251	1105.6 Prohibited Locations. 1105.7 Condensate. 1105.8 Defrost. 1105.9 Overflows. 1105.10 Condensate, Defrost, and Overflow Disposal. 1105.11 Refrigerant Port Protection. 1105.12 Storage. 1105.12.1 Quantity. 1106.0 Refrigeration Machinery Rooms. 1106.1 Where Required. 1106.1.1 Quantity. 1106.1.2 Equipment. 1106.1.3 A1 System. 1106.1.4 A1 Refrigerant. 1106.2 Dimensions. 1106.3 Exits. 1106.4 Refrigerant-Vapor Alarms.
252	1106.5 Separation. 1106.6 Combustion Air. 1106.7 Airflow. 1106.8 Special Requirements. 1107.0 Refrigeration Machinery Room Ventilation. 1107.1 General. 1107.2 Refrigeration Machinery Rooms. 1107.3 Natural Ventilation. 1107.4 Distribution of Ventilation. 1107.5 Use of Ventilation Systems for Other Purposes. 1107.6 Emergency Control of the Ventilation Systems.
253	1107.7 Ventilation Discharge. 1107.8 Fans. 1107.9 Ventilation Intake. 1107.10 Maximum Temperature. 1107.11 Refrigerant Parts in Air Duct. 1108.0 Refrigeration Machinery Room Equipment and Controls. 1108.1 General. 1108.2 Electrical. 1108.3 Emergency Shut-off. 1108.4 Installation, Maintenance, and Testing. 1108.5 Emergency Pressure Control System. 1109.0 Refrigeration Piping, Containers, and Valves. 1109.1 Materials. 1109.1.1 Copper and Copper Alloy Pipe. 1109.1.2 Iron and Steel. 1109.1.3 Prohibited Contact. 1109.2 Joints. 1109.3 Penetration of Piping.
254	1109.4 Location of Refrigeration Piping. 1109.4.1 Protection from Mechanical Damage. 1109.5 Underground Piping. 1109.5.1 Piping in Concrete Floors. 1109.6 Support. 1109.7 Pipe Enclosure. 1109.8 Visual Inspection. 1109.9 Condensation. 1109.10 Identification. 1110.0 Valves. 1110.1 More than 6.6 Pounds of Refrigerant. 1110.2 More than 110 Pounds of Refrigerant. 1110.3 Support.
255	1110.4 Access. 1110.5 Identification. 1111.0 Pressure-Limiting Devices. 1111.1 Where Required. 1111.2 Setting. 1111.3 Connection. 1111.4 Operation. 1112.0 Pressure-Relief Devices. 1112.1 General. 1112.2 Positive Displacement Compressor. 1112.3 Liquid-Containing Portions of Systems. 1112.4 Evaporators.
256	1112.5 Actuation. 1112.6 Stop Valves Prohibited. 1112.7 Location. 1112.8 Materials. 1112.9 Pressure-Relief Device Settings. 1112.9.1 Rupture Member Setting. 1112.10 Discharge from Pressure-Relief Devices. 1112.10.1 Discharging Location Interior to Building. 1112.10.2 Discharging Location Exterior to Building.
257	1112.10.3 Internal Relief. 1112.10.4 Discharge Location, Special Requirements. 1112.10.4.1 Water (R-718). 1112.11 Discharge Piping. 1112.11.1 Piping Connection. 1112.11.2 Pipe Size. 1112.11.3 Maximum Length. 1112.11.4 Design Back Pressure. Table 1112.11.3 Atmospheric Pressure at Nominal Installation Elevation (Pa)
258	1112.11.5 Simultaneous Operation. 1112.12 Rating of Pressure-Relief Device. 1112.13 Rating of Rupture Members and Fusible Plugs. 1113.0 Overpressure Protection. 1113.1 General. 1113.2 Type of Protection. 1113.3 Discharging Into Lowside of System. 1113.4 Parallel Pressure-Relief Devices.
259	1113.5 Discharge Capacity. 1113.6 Three-Way Valve. 1114.0 Special Discharge Requirements. 1114.1 General. 1114.2 Design Requirements. Table1113.5 Relief Devices Capacity Factor
260	1114.3 Testing. 1115.0 Labeling and Identification. 1115.1 General. 1115.2 Volume and Type. 1115.3 Permanent Sign. 1115.4 Marking of Pressure-Relief Devices. 1115.4.1 Rupture Members. 1115.4.2 Fusible Plugs. 1116.0 Testing of Refrigeration Equipment. 1116.1 Factory Tests. 1116.1.1 Testing Procedure. 1116.1.2 Applied Pressure. 1116.1.3 Design Pressure of 15 psig or Less. 1116.2 Field Tests. 1116.3 Test Gases.
261	1116.4 Declaration. 1116.5 Brine Systems. 1117.0 Refrigerant-Containing Pressure Vessels. 1117.1 Inside Dimensions 6 inches or Less. 1117.1.1 Pressure-Relief Device. 1117.1.2 Fusible Plug. 1117.2 Inside Dimensions More than 6 inches. 1117.3 Pressure Vessels for 15 psig or Less. Table 1116.2 Field Leak Test Pressures (psig)
262	1118.0 Maintenance and Operation. 118.1 General. Part II – Cooling Towers. 1119.0 General. 1119.1 Applicability. 1120.0 Support and Anchorage. 1120.1 General. 1121.0 Drainage. 1121.1 General. 1122.0 Chemical Treatment Systems. 1122.1 General. 1122.2 Automated Control of Cycles of Concentration. 1123.0 Location. 1123.1 General. 1124.0 Electrical. 1124.1 General. 1125.0 Refrigerants and Hazardous Fluids. 1125.1 General. 1126.0 Drift Eliminators. 1126.1 General.
263	Table 1102.2 Refrigerant Groups, Properties, and Allowable Quantities
267	Table 1104.1 Permissible Refrigeration Systems
268	Chapter 12 Hydronics
270	1201.0 General. 1201.1 Applicability. 1201.2 Insulation. 1201.3 Water Hammer. 1201.4 Manifolds. 1201.5 Heat Emitters. 1202.0 Protection of Potable Water Supply. 1202.1 Prohibited Sources. 1202.2 Chemical Injection. 1202.3 Compatibility. 1203.0 Capacity of Heat Source. 1203.1 Heat Source. 1203.2 Dual Purpose Water Heater. 1203.3 Tankless Water Heater. 1204.0 Identification of a Potable and Nonpotable Water System. 1204.1 General. 1204.2 Color and Information. 1204.3 Potable Water. 1204.4 Nonpotable Water. TABLES Table 1203.2 Water Heaters
271	1204.5 Location of Piping Identification. 1204.6 Flow Directions. 1205.0 Installation, Testing, and Inspection. 1205.1 Operating Instructions. 1205.2 Pressure Testing. 1205.3 Flushing. 1205.4 Oxygen Diffusion Corrosion. 1206.0 Safety Devices. 1206.1 General. 1206.2 Pressurized Vessels. 1206.3 Discharge Piping. 1207.0 Heating Appliances and Equipment. 1207.1 General. 1207.2 Boilers. 1207.2.1 Condensing Boilers. 1207.2.2 Noncondensing Boilers. 1207.3 Dual-Purpose Water Heaters. Table 1204.3 Minimum Length of Color Field and Size of Letters
272	1207.3.1 Temperature Limitations. 1207.4 Solar Heat Collector Systems. 1208.0 Circulators. 1208.1 General. 1208.2 Mounting. 1208.3 Sizing. 1209.0 Expansion Tanks. 1209.1 Where Required. 1209.2 Systems with Closed Expansion Tanks. 1209.3 Systems with Open Expansion Tanks. 1210.0 Materials. 1210.1 Piping, Tubing, and Fittings. 1210.2 Expansion and Contraction. 1210.3 Hangers and Supports. 1211.0 Joints and Connections. 1211.1 General.
273	1211.2 Chlorinated Polyvinyl Chloride (CPVC) Pipe. 1211.3 Copper or Copper Alloy Pipe and Tubing. Table 1210.1 Materials for Hydronic System Piping, Tubing, and Fittings
274	1211.4 Cross-Linked Polyethylene (PEX) Pipe. 1211.5 Cross-Linked Polyethylene/Aluminum/Cross-Linked Polyethylene (PEX-AL-PEX) Pipe. 1211.6 Ductile Iron Pipe.
275	1211.7 Polyethylene (PE) Plastic Pipe/Tubing. 1211.8 Polyethylene/Aluminum/ Polyethylene (PE-ALPE). 1211.9 Polyethylene of Raised Temperature (PE-RT). 1211.10 Polypropylene (PP) Pipe. 1211.11 Polyvinyl Chloride (PVC) Pipe.
276	1211.12 Steel Pipe and Tubing. 1211.13 Joints Between Various Materials. 1211.13.1 Copper or Copper Alloy Pipe or Tubing to Threaded Pipe Joints. 1211.13.2 Plastic Pipe to Other Materials. 1212.0 Valves. 1212.1 General. 1212.2 Where Required. 1212.3 Heat Exchanger. 1212.4 Pressure Vessels 1212.5 Pressure Reducing Valves. 1212.6 Equipment, Components, and Appliances. 1212.7 Expansion Tank. 1212.8 Flow Balancing Valves. 1212.9 Mixing or Temperature Control Valves. 1212.10 Thermosiphoning. 1212.11 Air Removal Device or Air Vents.
277	1213.0 System Controls. 1213.1 Water Temperature Controls. 1213.2 Radiant Floor Heating Panels. 1213.3 Operating Steam Controls. 1213.3.1 Water-Level Controls. 1213.4 Occupied Spaces. 1213.5 Return-Water Low-Temperature Protection. 1214.0 Pressure and Flow Controls. 1214.1 Balancing. 1214.2 Low-Water Control. 1214.3 Flow-Sensing Devices. 1214.4 Automatic Makeup Water. 1214.5 Differential Pressure Regulation. 1214.5.1 Differential Pressure Bypass Valve. 1214.6 Air-Removal Device. 1214.7 Air-Separation Device. 1214.8 Secondary Loops. 1215.0 Hydronic Space Heating. 1215.1 General. 1215.2 Installation. 1215.3 Freeze Protection. 1215.4 Balancing. 1215.5 Heat Transfer Medium.
278	1216.0 Steam Systems. 1216.1 Steam Traps. 1216.2 Sloping for Two-Pipe System. 1216.3 Sloping for One-Pipe System. 1216.4 Automatic Air Vents. 1216.5 Condensate Flow. 1216.6 Steam-Distribution Piping. 1217.0 Radiant Heating and Cooling. 1217.1 Installation. 1217.2 Radiant Under-Floor Heating. 1217.3 Chilled Water Systems. 1217.4 Dehumidification. 1217.5 Tube Placement. 1217.6 Poured Floor Systems (Thermal Mass). 1217.6.1 Slab Penetration Tube and Joint Protection. 1217.6.2 Insulation. Table 1217.5 Maximum Length of Continuous Tubing From a Supply-and-Return Manifold Arrangement
279	1217.6.3 Joist Systems and Subfloors. 1217.6.4 Wall and Ceiling Panels. 1217.7 Radiant Heating and Cooling Panels. 1217.7.1 Electric Heating Panel Systems. 1217.7.2 Radiant Wall and Ceiling Panels. 1218.0 Heat Exchangers. 1218.1 General. 1219.0 Indirect-Fired Domestic Hot-Water Storage Tanks. 1219.1 General. 1220.0 Auxiliary Systems. 1220.1 General.
280	1220.2 Use of Chemical Additives and Corrosive Fluids. 1220.3 Snow Melt. 1220.3.1 Tube Placement. 1220.3.2 Poured Concrete Slab Systems (Thermal Mass). 1220.3.3 Slab Penetration Tube and Joint Protection. 1220.3.4 Concrete Slab Preparation. 1220.3.5 Insulation. 1220.3.6 Testing. 1220.4 Hydronic Makeup Air Units. 1221.0 Piping Installation. 1221.1 General. 1221.2 Embedded Piping and Joints. 1221.2.1 Steel Pipe. 1221.2.2 Copper Tubing. 1221.2.3 Plastics. 1221.3 Pressure Tested. Table 1220.3.1 Loop Lengths for Snow Melt Systems
281	1221.4 System Drainage. 1221.5 Condensate Drainage. 1221.6 Clearance to Combustibles.
282	Chapter 13 Fuel Gas Piping
284	1301.0 Scope of Gas Piping. 1301.1 Applicability. 1302.0 Coverage of Piping System. 1302.1 General. 1302.2 Piping System Requirements. 1302.3 Applications. 1303.0 Inspection. 1303.1 Inspection Notification. 1303.2 Excavation. 1303.3 Type of Inspections. 1303.3.1 Rough Piping Inspection. 1303.3.2 Final Piping Inspection. 1303.3.3 Test Gauges. TABLES FIGURES
285	1303.3.3.1 Pressure Tests (10 psi or less). 1303.3.3.2 Pressure Tests (greater than 10 psi to100 psi). 1303.3.3.3 Pressure Tests (exceeding 100 psi). 1303.3.3.4 Pressure Range. 1303.4 Inspection Waived. 1304.0 Certificate of Inspection. 1304.1 Issuance. 1304.2 Gas Supplier. 1304.3 Unlawful. 1305.0 Authority to Render Gas Service. 1305.1 Authorized Personnel. 1305.2 Outlets. 1306.0 Authority to Disconnect. 1306.1 Disconnection. 1306.2 Notice. 1306.3 Capped Outlets. 1307.0 Temporary Use of Gas. 1307.1 General. 1308.0 Gas Piping System Design, Materials, and Components. 1308.1 Installation of Piping System. 1308.1.1 Addition to Existing System. 1308.2 Provision for Location of Point of Delivery. 1308.3 Interconnections Between Gas Piping Systems. 1308.3.1 Interconnections for Standby Fuels.
286	1308.4 Sizing of Gas Piping Systems. 1308.4.1 Maximum Gas Demand. 1308.4.2 Sizing Methods. 1308.4.3 Allowable Pressure Drop. 1308.5 Acceptable Piping Materials and Joining Methods. 1308.5.1 Materials. 1308.5.1.1 Other Materials. 1308.5.2 Metallic Pipe. 1308.5.2.1 Steel and Wrought-Iron. 1308.5.2.2 Copper and Copper Alloy. Table 1308.4.1 Approximate Gas Input for Typical Appliances
287	1308.5.2.3 Aluminum Alloy. 1308.5.3 Metallic Tubing. 1308.5.3.1 Steel. 1308.5.3.2 Copper and Copper Alloy. 1308.5.3.3 Aluminum Alloy. 1308.5.3.4 Corrugated Stainless Steel. 1308.5.4 Plastic Pipe, Tubing, and Fittings. 1308.5.4.1 Regulator Vent Piping. 1308.5.4.2 Anodeless Risers. 1308.5.4.2.1 Factory-Assembled Anodeless Risers. 1308.5.4.2.2 Service Head Adapters and Field-Assembled Anodeless Risers. 1308.5.4.2.3 Undiluted Liquefied Petroleum Gas Piping. 1308.5.5 Workmanship and Defects. 1308.5.6 Protective Coating. 1308.5.7 Metallic Pipe Threads. 1308.5.7.1 Damaged Threads. 1308.5.7.2 Number of Threads. Table 1308.5.7.2 Specifications for Threading Metallic Pipe
288	1308.5.7.3 Thread Joint Compounds. 1308.5.8 Metallic Piping Joints and Fittings. 1308.5.8.1 Pipe Joints. 1308.5.8.2 Tubing Joints. 1308.5.8.3 Flared Joints. 1308.5.8.4 Metallic Pipe Fittings (Including Valves, Strainers, Filters). 1308.5.9 Plastic Piping, Joints, and Fittings. 1308.5.9.1 Joint Design. 1308.5.9.2 Heat-Fusion Joint. 1308.5.9.3 Compression-Type Mechanical Joints. 1308.5.9.4 Liquefied Petroleum Gas Piping Systems.
289	1308.5.10 Flanges. 1308.5.10.1 Flange Facings. 1308.5.10.2 Lapped Flanges. 1308.5.11 Flange Gaskets. 1308.6 Gas Meters. 1308.6.1 Location. 1308.6.1.1 Subject to Damage. 1308.6.1.2 Extreme Temperatures. 1308.6.2 Supports. 1308.6.3 Meter Protection. 1308.6.4 Identification. 1308.7 Gas Pressure Regulators. 1308.7.1 Overpressure Protection. 1308.7.2 Listing. 1308.7.3 Location. 1308.7.4 Regulator Protection. 1308.7.5 Venting of Line Pressure Regulators.
290	1308.7.6 Venting of Gas Appliance Pressure Regulators. 1308.7.7 Discharge of Vents. 1308.7.8 Bypass Piping. 1308.7.9 Identification. 1308.8 Backpressure Protection. 1308.8.1 Protective Devices. 1308.9 Low-Pressure Protection. 1308.10 Shutoff Valves. 1308.11 Expansion and Flexibility. 1308.11.1 Special Local Conditions. 1309.0 Excess Flow Valve. 1309.1 General. 1310.0 Venting of Gas Appliance Pressure Regulators. 1310.1 General.
291	1311.0 Gas Piping Installation. 1311.1 Piping Underground. 1311.1.1 Cover Requirements. 1311.1.2 Trenches. 1311.1.2.1 Backfilling. 1311.1.3 Protection Against Corrosion. 1311.1.4 Protection Against Freezing. 1311.1.5 Piping through Foundation Wall. 1311.1.6 Piping Underground Beneath Buildings. 1311.1.6.1 Conduit with One End Terminating Outdoors. 1311.1.6.2 Conduit with Both Ends Terminating Indoors. 1311.1.7 Plastic Piping. 1311.1.7.1 Connections Between Metallic and Plastic Piping. 1311.1.7.2 Tracer Wire. 1311.2 Installation of Piping.
292	1311.2.1 Building Structure. 1311.2.2 Gas Piping to be Sloped. 1311.2.2.1 Ceiling Locations. 1311.2.3 Prohibited Locations. 1311.2.4 Hangers, Supports, and Anchors. 1311.2.4.1 Spacing. 1311.2.4.2 Expansion and Contraction. 1311.2.5 Removal of Piping. 1311.3 Concealed Piping in Buildings. 1311.3.1 Connections. 1311.3.2 Piping in Partitions. 1311.3.3 Tubing in Partitions. 1311.3.4 Piping in Floors. Table 1311.2.4.1 Support of Piping
293	1311.4 Piping in Vertical Chases. 1311.4.1 Pressure Reduction. 1311.4.2 Construction. 1311.4.3 Ventilation. 1311.5 Maximum Design Operating Pressure. 1311.6 Appliance Overpressure Protection. 1311.7 Gas Pipe Turns. 1311.7.1 Metallic Pipe. 1311.7.2 Plastic Pipe. 1311.7.3 Elbows.
294	1311.8 Drips and Sediment Traps. 1311.8.1 Location of Drips. 1311.8.2 Sediment Traps. 1311.9 Outlets. 1311.9.1 Cap Outlets. 1311.9.1.1 Appliance Shutoff Valves. 1311.10 Branch Pipe Connection. 1311.11 Manual Gas Shutoff Valves. 1311.11.1 Valves Controlling Multiple Systems. 1311.11.1.1 Shutoff Valves for Multiple House Lines. 1311.11.2 Emergency Shutoff Valves. 1311.11.3 Shutoff Valve for Laboratories. 1311.12 Prohibited Devices. 1311.13 Systems Containing Gas-Air Mixtures Outside the Flammable Range. 1311.14 Systems Containing Flammable Gas-Air Mixtures.
295	1311.14.1 Required Components. 1311.14.2 Optional Components. 1311.14.3 Additional Requirements. 1311.14.4 Special Requirements for Mixing Blowers. 1311.14.5 Installation of Gas-Mixing Machines. 1311.14.6 Use of Automatic Firechecks, Safety Blowouts, or Backfire Preventers.
296	1312.0 Electrical Bonding and Grounding. 1312.1 Pipe and Tubing Other than CSST. 1312.2 Bonding of CSST Gas Piping. 1312.3 Grounding Conductor of Electrode. 1312.4 Lightning Protection System. 1312.5 Electrical Circuits. 1312.6 Electrical Connections. 1312.6.1 Safety Control. 1313.0 Appliance Connections to Building Piping. 1313.1 Connecting Gas Appliances. 1313.1.1 Commercial Cooking Appliances. 1313.1.2 Restraining Device. 1313.2 Use of Gas Hose Connectors. 1313.2.1 Indoor. 1313.2.2 Outdoor.
297	1313.3 Connection of Portable and Mobile Industrial Appliances. 1313.3.1 Swivel Joints or Couplings. 1313.3.2 Metal Flexible Connectors. 1313.3.3 Flexible Connectors. 1313.4 Appliance Shutoff Valves and Connections. 1313.5 Quick-Disconnect Devices. 1313.6 Gas Convenience Outlets. 1313.7 Sediment Trap. 1313.8 Installation of Piping. 1313.9 Liquefied Petroleum Gas Facilities and Piping. 1313.9.1 Safety Shutoff Devices for Unlisted LP-Gas Appliance Used Indoors. Figure 1313.7 Method of Installing a Tee Fitting Sediment Trap
298	1314.0 Pressure Testing and Inspection. 1314.1 Piping Installations. 1314.1.1 Inspection Requirements. 1314.1.2 Repairs and Additions. 1314.1.3 New Branches. 1314.1.4 Piping System. 1314.1.5 Regulators and Valves. 1314.1.6 Test Medium. 1314.2 Test Preparation. 1314.2.1 Pipe Joints. 1314.2.2 Expansion Joints. 1314.2.3 Appliances and Equipment. 1314.2.4 Designed for (less than) Operating Pressures. 1314.2.5 Designed for (equal to or more than) Operating Pressures. 1314.2.6 Safety. 1314.3 Test Pressure. 1314.4 Detection of Leaks and Defects. 1314.4.1 Detecting Leaks. 1314.4.2 Repair or Replace.
299	1314.5 Piping System Leak Test. 1314.5.1 Turning Gas On. 1314.5.2 Leak Check. 1314.5.3 Placing Appliances and Equipment in Operation. 1314.6 Purging Requirements. 1314.6.1 Piping Systems Required to be Purged Outdoors. 1314.6.1.1 Removal from Service. 1314.6.1.2 Placing in Operation. 1314.6.1.3 Outdoor Discharge of Purged Gases. 1314.6.1.4 Combustible Gas Indicator. 1314.6.2 Piping Systems Allowed to be Purged Indoors or Outdoors. 1314.6.2.1 Purging Procedure. Table 1314.6.1 Size and Length of Piping
300	1314.6.2.2 Combustible Gas Detector. 1314.6.3 Purging Appliances and Equipment. 1315.0 Required Gas Supply. 1315.1 General. 1315.2 Volume. 1315.3 Gas Appliances. 1315.4 Size of Piping Outlets. 1316.0 Required Gas Piping Size. 1316.1 Pipe Sizing Methods. 1316.1.1 Longest Length Method. 1316.1.2 Branch Length Method. 1316.1.3 Hybrid Pressure. 1316.2 Tables for Sizing Gas Piping Systems. 1316.3 Sizing Equations.
301	1316.4 Sizing of Piping Sections. 1316.5 Engineering Methods. 1316.6 Variable Gas Pressures. Table 1316.3 Cr and Y for Natural Gas and Undiluted Propane at Standard Conditions
302	Figure 1316.1.1 Example Illustrating Use of Table 1308.4.1 and Table 1316.2(1)
303	Table 1316.2(1) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.2(b)]
304	Table 1316.2(2) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.2(c)]
305	Table 1316.2(3) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.2(d)]
306	Table 1316.2(4) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.2(e)]
307	Table 1316.2(5)Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.2(f)]
308	Table 1316.2(6) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.2(g)]
309	Table 1316.2(7) Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.2(h)]
310	Table 1316.2(8) Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.2(i)]
311	Table 1316.2(9)Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.2(j)]
312	Table 1316.2(10) Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.2(k)]
313	Table 1316.2(11) Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.2(l)]
314	Table 1316.2(12) Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.2(m)]
315	Table 1316.2(13)Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.2(n)]
316	Table 1316.2(14) Corrugated Stainless Steel Tubing (CSST) [NFPA 54: TABLE 6.2(o)]
317	Table 1316.2(15) Corrugated Stainless Steel Tubing (CSST) [NFPA 54: TABLE 6.2(p)]
318	Table 1316.2(16) Corrugated Stainless Steel Tubing (CSST) [NFPA 54: TABLE 6.2(q)]
319	Table 1316.2(17) Corrugated Stainless Steel Tubing (CSST) [NFPA 54: TABLE 6.2(r)]
320	Table 1316.2(18) Corrugated Stainless Steel Tubing (CSST) [NFPA 54: TABLE 6.2(s)]
321	Table 1316.2(19) Polyethylene Plastic Pipe [NFPA 54: TABLE 6.2(t)]
322	Table 1316.2(20) Polyethylene Plastic Pipe [NFPA 54: TABLE 6.2(u)]
323	Table 1316.2(21) Polyethylene Plastic Pipe [NFPA 54: TABLE 6.2(v)]
324	Table 1316.2(22) Polyethylene Plastic Tubing [NFPA 54: TABLE 6.2(w)] Table 1316.2(23) Polyethylene Plastic Tubing [NFPA 54: TABLE 6.2(x)]
325	Table 1316.2(24) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.3(a)]
326	Table 1316.2(25) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.3(b)]
327	Table 1316.2(26) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.3(c)]
328	Table 1316.2(27) Schedule 40 Metallic Pipe [NFPA 54: TABLE 6.3(d)]
329	Table 1316.2(28) Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.3(e)]
330	Table 1316.2(29) Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.3(f)]
331	Table 1316.2(30) Semi-Rigid Copper Tubing [NFPA 54: TABLE 6.3(g)]
332	Table 1316.2(31) Corrugated Stainless Steel Tubing (CSST) [NFPA 54: TABLE 6.3(h)]
333	Table 1316.2(32) Corrugated Stainless Steel Tubing (CSST) [NFPA 54: TABLE 6.3(i)]
334	Table 1316.2(33) Corrugated Stainless Steel Tubing (CSST) [NFPA 54: TABLE 6.3(j)]
335	Table 1316.2(34)Polyethylene Plastic Pipe [NFPA 54: TABLE 6.3(k)]
336	Table 1316.2(35) Polyethylene Plastic Pipe [NFPA 54: TABLE 6.3(l)]
337	Table 1316.2(36) Polyethylene Plastic Tubing [NFPA 54: TABLE 6.3(m)]
338	Chapter 14 Process Piping
340	1401.0 General. 1401.1 Applicability. 1402.0 Permit. 1402.1 General. 1403.0 Plans Required. 1403.1 General. 1404.0 Workmanship. 1404.1 General. 1405.0 Inspections. 1405.1 General. 1405.2 Required Inspections. 1405.2.1 Rough Piping Inspection. 1405.2.2 Final Piping Inspection. 1405.3 Other Inspections. 1406.0 Pipe, Tubing, and Fittings. 1406.1 General. 1406.2 Hazardous Process Piping (HPP). 1406.2.1 Installation in Exit Corridors and Above Other Occupancies.
341	1406.2.1.1 Automatic Sprinklers. 1406.2.1.2 Ventilation. 1406.2.1.3 Receptor. 1406.2.1.4 Separation. 1406.2.1.5 Emergency Shutoff Valves. 1406.2.1.6 Electrical Wiring. 1406.3 Special Requirements for HPP Gases. 1406.3.1 Special Provisions. 1406.3.2 Piping and Tubing Installation. 1406.3.3 Gas-Detection System.
342	Chapter 15 Solar Energy Systems
344	1501.0 General. 1501.1 Applicability. 1502.0 General.
346	Chapter 16 Stationary Power Plants
348	1601.0 Stationary Fuel Cell Power Plants. 1601.1 General. 1602.0 Stationary Gas Engines and Generators. 1602.1 General. 1602.2 Connection to the Gas Supply Piping. 1602.3 Stationary Engine Generators.
350	Chapter 17 Referenced Standards
352	1701.0 General. 1701.1 Standards. TABLE Table 1701.1 Referenced Standards
367	Abbreviations in Table 1701.1
368	Appendices Table of Contents
370	Appendix A – Residential Plan Examiner Review Form for HVAC System Design
372	Residential Plan Examiner Review Form for HVAC System Design (Loads, Equipment, Ducts) [ACCA]
374	Appendix B – Procedures to be Followed to Place Gas Equipment in Operation
376	B 101.0 Adjusting the Burner Input. B 101.1 Adjusting Input. B 101.2 High Altitude. B 102.0 Primary Air Adjustment. B 102.1 General. B 103.0 Safety Shutoff Devices. B 103.1 General. B 104.0 Automatic Ignition. B 104.1 General. B 105.0 Protective Devices. B 105.1 General. B 106.0 Checking the Draft. B 106.1 General. B 107.0 Operating Instructions. B 107.1 General.
378	Appendix C – Installation and Testing of Oil (Liquid) Fuel-Fired Equipment
380	C 101.0 General. C 101.1 Applicability. C 102.0 Definitions.
381	C 103.0 Standards and Accepted Practices. C 103.1 General. C 104.0 Approval of Equipment. C 104.1 General. C 105.0 Placing Equipment in Operation. C 105.1 General. C 106.0 Pilot Operation. C 106.1 General. C 107.0 Burner Operation. C 107.1 General. C 108.0 Method of Test. C 108.1 General Test Methods.
383	C 109.0 Special Requirements Based on Btu/h Input. C 109.1 General.
386	Appendix D – Fuel Supply: Manufactured/Mobile Home Parks and Recreational Vehicle Parks
388	D 101.0 Fuel Gas Piping Systems. D 101.1 General. D 101.2 Gas Supply Connections. D 101.3 Location of Gas Supply Connection. D 101.4 Recreational Vehicle Park Fuel-Gas Equipment and Installations. D 102.0 Single and Multiple Manufactured Home Site Fuel Supply Systems. D 102.1 Underground Installation. D 102.1.1 Open-Ended Gastight Conduit. D 102.1.2 Requirements. D 103.0 Manufactured Home Site Gas Shutoff Valve. D 103.1 General. D 104.0 Gas Meters. D 104.1 Support of Meters. D 104.2 Location of Meters. D 104.3 Meter Shutoff Valve or Cock. D 105.0 Cathodic Protection Requirements. D 105.1 General. TABLE
389	D 106.0 Manufactured Home Community LPG Supply Systems. D 106.1 General. D 107.0 Required Gas Supply. D 107.1 General. D 108.0 Gas Pipe Sizing and Pressure. D 108.1 Size. D 108.2 Pressure. D 109.0 Gas Piping Materials. D 109.1 Metal. D 109.2 Protection Coatings for Metal Gas Piping. D 109.3 Plastic. D 110.0 Gas Piping Installations. D 110.1 Minimum Burial Below Ground Level and Clearances. D 110.2 Metallic Gas Piping. D 110.2.1 Cathodic Protection. Table D 107.1 Demand Factors for Use in Calculating Gas Piping Systems in M/H Communities
390	D 110.2.2 Underground Metallic Systems. D 110.3 Plastic Gas Piping. D 110.4 Gas Piping System Shutoff Valve. D 111.0 Liquefied Petroleum Gas Appliances. D 111.1 General. D 112.0 Oil Supply. D 112.1 General. D 112.2 Minimum Oil Supply Tank Size. D 112.3 Oil Supply Connections. D 113.0 Fuel Supply Systems Installation. D 113.1 Flexible Gas Connector. D 113.2 Use of Approved Pipe and Fittings of Extension.
391	D 113.3 Mechanical Protection. D 113.4 Special Rules on Atmospherically Controlled Regulators. D 113.5 Fuel Gas Piping Test. D 113.5.1 Procedures. D 113.5.2 Warning. D 113.5.3 Vents. D 113.6 Oil Tanks. D 113.6.1 Installation. D 113.6.2 Capacity. D 113.6.3 Location. D 113.6.4 Vent. D 113.6.5 Liquid Level. D 113.6.6 Fill Opening. D 114.0 Manufactured Home Accessory Building Fuel Supply Systems. D 114.1 General. D 115.0 Community Building Fuel Supply Systems in Manufactured Home Communities. D 115.1 Fuel Gas Piping and Equipment Installations. D 115.2 Oil Supply Systems in M/H Communities.
392	D 115.3 Oil-Burning Equipment and Installation. D 115.4 Inspection and Tests.
394	Appendix E – Sustainable Practices
396	E 101.0 General. E 101.1 Applicability. E 101.2 Definition of Terms. E 201.0 Definitions. E 201.1 Cycles of Concentration for Cooling Towers. E 201.2 Energy Star. E 201.3 Geothermal. E 201.4 Heating Seasonal Performance Factor (HSPF). E 201.5 Integrated Energy Efficiency Ratio (IEER). E 201.6 Integrated Part-Load Value (IPLV). E 201.7 Maintenance. E 201.8 Minimum Efficiency Reporting Value (MERV). E 201.9 Multi-Occupant Spaces. E 201.10 Recirculation System. E 201.11 Seasonal Energy Efficiency Ratio (SEER). E 301.0 General Regulations. E 301.1 Installation. E 301.2 Qualifications. E 302.0 Disposal of Liquid Waste. E 302.1 Disposal. E 302.2 Connections to Plumbing System Required. E 303.0 Abandonment. E 303.1 General. E 401.0 Water Conservation and Efficiency. E 401.1 General. TABLES FORMS
397	E 402.0 Meters. E 402.1 Required. E 402.2 Consumption Data. E 402.3 Access. E 403.0 HVAC Water Use. E 403.1 Once-Through Cooling. E 403.2 Cooling Towers and Evaporative Coolers. E 403.3 Cooling Tower Makeup Water. E 403.4 Evaporative Cooler Water Use. E 403.4.1 Overflow Alarm. E 403.4.2 Automatic Pump Shut-Off. E 403.4.3 Cooler Reservoir Discharge. E 403.4.4 Discharge Water Reuse. E 403.4.5 Discharge Water to Drain. E 403.5 Use of Reclaimed (Recycled) and On-Site Treated Nonpotable Water for Cooling. E 403.5.1 Drift Eliminator. E 403.5.2 Disinfection. E 501.0 Heating, Ventilation, and Air-Conditioning Systems and Equipment – Energy Efficiency. E 501.1 Scope.
398	E 502.0 Heating, Ventilation, and Air-Conditioning Low-Rise Residential Buildings. E 502.1 General. E 502.2 Heating, Ventilating, and Air-Conditioning Systems and Equipment. E 502.2.1 Non-Residential Type Systems and Equipment. E 502.3 Balancing. E 502.3.1 Balancing Dampers. E 502.4 Ducts. E 502.4.1 Insulation for Ducts. E 502.4.2 Ducts and Register Penetrations. E 502.4.3 Duct Leakage Test. E 502.4.3.1 Duct Leakage Verification Test. E 502.4.4 Duct Sizing. E 502.5 Insulation for Piping. E 502.6 Ventilation and Combustion Air. E 502.6.1 Combustion Air. E 502.7 Electric Heating Systems. E 502.7.1 Wall, Floor, or Ceiling Electric-Resistance Heating.
399	E 502.7.2 Electric Central Warm Air Heating. E 502.8 Bath Ceiling Units. E 502.9 HVAC Equipment, Rated Combinations. Table E 502.5 Minimum Pipe Insulation Thickness Table E 502.6 Ventilation Air
400	E 502.10 Controls. E 502.10.1 Initial Control Setting. E 502.10.2 Ventilation Control. E 502.10.3 Humidity Control. E 502.10.3.1 Cooling. E 502.10.4 Freeze Protection Systems. E 502.10.5 Other Controls. E 502.11 Whole House Fans. E 502.12 Dampers. E 503.0 Heating, Ventilation, and Air-Conditioning – Other than Low-Rise Residential Buildings. E 503.1 General. E 503.1.1 New Buildings. Table E 502.9 Minimum Requirements for Non-Federally Covered HVAC Equipment
401	E 503.1.2 Additions to Existing Buildings. E 503.1.3 Alterations to Heating, Ventilating, Air-Conditioning, and Refrigeration in Existing Buildings. E 503.1.3.1 New Cooling Systems. E 503.1.3.2 Existing Cooling Systems. E 503.1.3.3 Ductwork. E 503.1.3.4 Piping. E 503.2 Compliance Path(s). E 503.2.1 Projects Using Energy Cost Budget Method. E 503.3 Simplified Approach Option for HVAC Systems. E 503.3.1 Criteria.
402	E 503.3.2 Climate Zone Determination. E 503.4 Mandatory Provisions.
403	E 503.4.1 Water-Cooled Centrifugal Chilling Packages. E 503.4.1.1 Positive Displacement (air- and water-cooled) Chilling Packages. E 503.4.2 Equipment not Listed.
404	E 503.4.3 Verification of Equipment Efficiencies. E 503.4.4 Labeling. E 503.4.4.1 Packaged Terminal Air Conditioners. E 503.4.5 Load Calculations. E 503.4.5.1 Pump Head. E 503.4.6 Controls. E 503.4.6.1 Dead Band. E 503.4.6.2 Setpoint Overlap Restriction. E 503.4.6.3 Off-Hour Controls.
405	E 503.4.6.3.1 Automatic Shutdown. E 503.4.6.3.2 Setback Controls. E 503.4.6.3.3 Optimum Start Controls. E 503.4.6.3.4 Zone Isolation. E 503.4.6.4 Ventilation System Controls. E 503.4.6.4.1 Shutoff Damper Controls.
406	E 503.4.6.4.2 Dampers Leakage. E 503.4.6.4.3 Ventilation Fan Controls. E 503.4.6.5 Enclosed Parking Garage Ventilation. E 503.4.6.6 Heat Pump Auxiliary Heat Control. E 503.4.6.7 Humidification and Dehumidification. Table E 503.4.6.4.2 Maximum Damper Leakage
407	E 503.4.6.8 Freeze Protection and Snow or Ice Melting Systems. E 503.4.6.9 Ventilation Controls for High-Occupancy Areas. E 503.4.6.10 Outdoor Heating. E 503.4.7 HVAC System Construction and Insulation. E 503.4.7.1 Insulation. E 503.4.7.1.1 Duct and Plenum Insulation.
408	E 503.4.7.1.2 Piping Insulation. E 503.4.7.1.3 Sensible Heating Panel. E 503.4.7.1.4 Radiant Floor Heating. E 503.4.7.2 Ducts and Plenum Leakage. E 503.4.7.2.1 Duct Leakage Tests. E 503.5 Prescriptive Path.
409	E 503.5.1 Air Economizers. Table E 503.5(1)Minimum Fan-Cooling Unit Size Where an Economizer is Required for Comfort Cooling Table E 503.5(2) Minimum Fan-Cooling Unit Size Where an Economizer is Required for Computer Rooms Table E 503.5(3) Eliminate Required Economizer for Comfort Cooling by Increasing Cooling Efficiency
410	E 503.5.1.1 Control Signal. E 503.5.1.2 High-Limit Shutoff. E 503.5.1.3 Dampers. E 503.5.1.4 Relief of Excess Outdoor Air. E 503.5.2 Water Economizers. E 503.5.2.1 Maximum Pressure Drop. E 503.5.3 Integrated Economizer Control. Table E 503.5.1.2 High-Limit Shutoff Control Settings for Air Economizers
411	E 503.5.4 Economizer Heating System Impact. E 503.5.4.1 Economizer Humidification System Impact. E 503.5.5 Simultaneous Heating and Cooling Limitation. Table E 503.5.2 Water Economizer Sizing Dry-Bulb and Wet-Bulb Requirements for Computer Rooms
412	E 503.5.5.1 Supply Air Temperature Reheat Limit. E 503.5.5.2 Hydronic System Controls. E 503.5.5.2.1 Three-Pipe System. E 503.5.5.2.2 Two-Pipe Changeover System. E 503.5.5.2.3 Hydronic (Water Loop) Heat Pump Systems.
413	E 503.5.5.3 Dehumidification. E 503.5.5.4 Humidifier Preheat. E 503.5.6 Air System Design and Control. E 503.5.6.1 Fan System Power and Efficiency. E 503.5.6.1.1 Motor Nameplate Horsepower.
414	E 503.5.6.2 Fan Airflow Control. Table E 503.5.6.1(1) Fan Power Limitation Table E 503.5.6.1(2) Fan Power Limitation Pressure Drop Adjustment
415	E 503.5.6.2.1 VAV Static Pressure Sensor Location. E 503.5.6.2.2 Setpoint Reset. E 503.5.6.3 Multiple-Zone VAV System Ventilation Optimization Control. E 503.5.6.4 Supply Air Temperature Reset Controls. Table E 503.5.6.2 Effective Dates for Fan Control
416	E 503.5.6.5 Fractional Horsepower Fan Motors. E 503.5.7 Hydronic System Design and Control. Table E 503.5.6.5(1) Minimum Average Full-Load Efficiency for Polyphase Small Electric Motors Table E 503.5.6.5(2) Minimum Average Full-Load Efficiency for Capacitor-Start Capacitor-Run and Capacitor-Start Induction-Run Small Electric Motors
417	E 503.5.7.1 Hydronic Variable Flow Systems. E 503.5.7.2 Chiller and Boiler Isolation. E 503.5.7.2.1 Boiler Isolation. E 503.5.7.3 Chilled- and Hot-Water Temperature Reset Controls. E 503.5.7.4 Hydronic (Water Loop) Heat Pump and Water-Cooled Unitary Air Conditioners. E 503.5.7.4.1 Controls. E 503.5.7.5 Pipe Sizing. Table E 503.5.7 Boiler Turndown
418	E 503.5.8 Heat Rejection Equipment. E 503.5.8.1 Fan Speed Control. E 503.5.9 Limitation on Centrifugal Fan Open-Circuit Cooling Towers. E 503.5.10 Exhaust Air Energy Recovery. Table E 503.5.7.5 Piping System Design Maximum Flow Rate (gallons per minute)
419	E 503.5.10.1 Heat Recovery for Service Water Heating. E 503.5.10.1.1 Condenser Heat Recovery Systems. E 503.5.10.1.2 Capacity. Table E 503.5.10(1) Exhaust Air Energy Recovery Requirements for Ventilation Systems Operating Less than 8000 Hours per Year Table E 503.5.10(2) Exhaust Air Energy Recovery Requirements for Ventilation Systems Operating Not Less than 8000 Hours per Year
420	E 503.5.11 Exhaust Systems. E 503.5.11.1 Kitchen Exhaust Systems. E 503.5.11.1.1 Conditioned Supply Air. E 503.5.11.2 Exhaust Flow Rate. E 503.5.11.2.1 Kitchen or Dining Facility. E 503.5.11.2.2 Performance Testing. E 503.5.11.3 Laboratory Exhaust Systems. Table E 503.5.11.2 Maximum Net Exhaust Flow Rate, CFM per linear Foot of Hood Length
421	E 503.5.12 Radiant Heating Systems. E 503.5.12.1 Heating Enclosed Spaces. E 503.5.13 Hot Gas Bypass Limitation. E 503.5.14 Door Switches. E 503.6 Submittals. E 503.6.1 Construction Details. E 503.6.2 Supplemental Information. E 503.6.3 Manuals. Table E 503.5.13 Hot Gas Bypass Limitation
422	E 503.6.3.1 Required Information. E 503.6.3.2 Lighting Manuals. E 503.6.4 Labeling of Material and Equipment. E 503.6.5 Completion Requirements. E 503.6.5.1 Drawings. E 503.6.5.2 Manuals. E 503.6.5.3 System Balancing. E 503.6.5.3.1 Air System Balancing. E 503.6.5.3.2 Hydronic System Balancing.
423	E 503.6.5.4 System Commissioning. E 503.6.5.4.1 Minimum Level of Commission. E 503.7 Minimum Equipment Efficiency Tables. E 503.7.1 Minimum Efficiency Requirement Listed Equipment – Standard Rating and Operating Conditions. E 503.7.2 Duct Insulation Tables. E 503.7.3 Pipe Insulation Tables. E 503.8 Alternative Compliance Path. E 503.8.1 Computer Room (PUE1). E 503.8.2 Computer Room (PUE0). E 503.8.3 Documentation. E 504.0 Solar Energy Systems. E 504.1 General. E 505.0 Geothermal Systems. E 505.1 Applicability. E 505.1.1 Design, Installation, and Testing. Table E 503.8.1 Power Usage Effectiveness (PUE) Maximum
424	Table E 503.7.1(1) Electrically Operated Unitary Air Conditioners and Condensing Units Minimum Efficiency Requirements
426	Table E 503.7.1(2) Electrically Operated Unitary and Applied Heat Pumps Minimum Efficiency Requirements
428	Table E 503.7.1(3) Water Chiling Packages – Efficiency Requirements
429	Table E 503.7.1(4) Electrically Operated Packaged Terminal Air Conditioners, Packaged Terminal, Heat Pumps, Single-Packed Vertical Air Conditioners, Single-Package Vertical Heat Pumps, Room Air Conditioners, and Room Air Conditioner-Heat Pumps – Minimum Efficiency Requirements
431	Table E 503.7.1(5) Warm Air Furnaces and Combination Warm Air Furnaces/Air-Conditioning Units, Warm Air Duct Furnaces and Unit Heaters
432	Table E 503.7.1(6) Gas and Oil-Fired Boilers, Minimum Efficiency Requirements
433	Table E 503.7.1(7) Performance Requirements for Heat Rejection Equipment
434	Table E 503.7.1(8) Heat Transfer Equipment Table E 503.7.1(9) Electrically Operated Variable-Refrigerant-Flow Air Conditioners-Minimum Efficiency Requirements
435	Table E 503.7.1(10) Electrically Operated Variable Refrigerant-Flow Air-to-Air and Applied Heat Pumps Minimum Efficiency Requirements
436	Table E 503.7.1(11) Air Conditioners and Condensing Units Serving Computer Rooms
437	Table E 503.7.1(12) Commercial Refrigerator and Freezer Table E 503.7.1(13) Commercial Refrigeration-Minimum Efficiency Requriements
438	Table E 503.7.2(1) Minimum Duct Insulation R-Value for Cooling and Heating Only Supply Ducts and Return Ducts
439	Table E 503.7.2(2) Minimum Duct Insulation R-Value for Combined Heating and Cooling Supply Ducts and Return Ducts Table E 503.7.3(1) Minimum Pipe Insulation Thickness for Heating and Hot Water Systems (Steam, Steam Condensate, Hot Water Heating, and Domestic Water Systems)
440	E 505.1.2 Heat Pump Approval. E 505.2 Ground Source Heat Pump-Loop Systems. E 505.3 Material Rating. E 505.4 Used Materials. E 505.5 Piping and Tubing Materials Standards. E 505.6 Fittings. E 506.0 Joints and Connections. E 506.1 Approval. Table E 503.7.3(2) Minimum Pipe Insulation Thickness for Cooling Systems (Chilled Water, Brine, and Refrigerant Table E 505.5 Plastic Ground Source Loop Piping
441	E 506.2 Joints Between Various Materials. E 506.3 Preparation of Pipe Ends. E 506.4 Joint Preparation and Installation. E 506.5 Mechanical Joints. E 506.6 Thermoplastic Welded Joints. E 506.7 CPVC Plastic Pipe. E 506.7.1 Threaded Joints. E 506.7.2 Solvent Cement. E 506.8 Cross-Linked Polyethylene (PEX) Plastic Tubing. E 506.8.1 Compression-Type Fittings. E 506.8.2 Plastic-to-Metal Connections. E 506.9 Polyethylene Plastic Pipe and Tubing. E 506.9.1 Heat-Fusion Joints. E 506.9.2 Electrofusion Joints. E 506.9.3 Stab-Type Insert Fittings. E 506.10 Polypropylene (PP) Plastic. E 506.10.1 Heat-Fusion Joints. E 506.10.2 Mechanical and Compression Sleeve Joints. Table E 505.6 Grond Source Loop Pipe Fittings
442	E 506.11 Raised Temperature Polyethylene (PE-RT) Plastic Tubing. E 506.11.1 Compression-Type Fittings. E 506.11.2 PE-RT-to-Metal Connections. E 506.12 PVC Plastic Pipe. E 506.12.1 Solvent Cement Joints. E 506.12.2 Threaded Joints. E 507.0 Valves. E 507.1 Where Required. E 507.2 Heat Exchangers. E 507.3 Central Systems. E 507.4 Pressure Vessels. E 507.5 Pressure-Reducing Valves. E 507.6 Equipment and Appliances. E 507.7 Expansion Tanks. E 507.8 Reduced Pressure. E 508.0 Installation. E 508.1 General. E 508.2 Protection of Potable Water. E 508.3 Pipe Penetrations. E 508.4 Clearance from Combustibles. E 508.5 Contact with Building Material. E 508.6 Strains and Stresses. E 508.7 Flood Hazard. E 508.8 Pipe Support. E 508.9 Velocities. E 508.10 Labeling and Marking. E 508.11 Chemical Compatibility.
443	E 508.12 Transfer Fluid. E 509.0 Testing. E 509.1 Ground Source Heat Pump Loop System Testing. E 509.2 Pressurizing During Installation. E 601.0 Indoor Environment. E 601.1 Scope. E 602.0 Fireplaces. E 602.1 Requirements. E 602.1.1 Masonry or Factory-Built Fireplace. E 602.1.1.1 Opening Cover. E 602.1.1.2 Combustion Air Intake. E 602.1.1.3 Accessible Damper Control. E 602.1.2 Prohibited. E 603.0 Pollutant Control. E 603.1 Indoor Air Quality During Construction. E 603.1.1 Temporary Ventilation During Construction. E 603.1.2 Indoor Air Quality After Construction. E 603.1.3 Covering of Duct Openings and Protection of Mechanical Equipment During Construction.
444	E 603.2 Isolation of Pollutant Sources. E 603.3 Filters. E 603.4 Ozone Depletion and Global Warming Reductions. E 604.0 Indoor Moisture Control. E 604.1 Rainwater Control. E 605.0 Indoor Air Quality for Low-Rise Residential. E 605.1 General. E 605.1.1 Natural Ventilation. E 605.1.1.1 Access to Operable Openings. E 605.1.2 Mechanical Ventilation. E 605.1.3 Whole-Building Ventilation. E 605.1.3.1 Total Ventilation Rate. Table E 605.1.3.1 Ventilation Air Requirements, (cubic foot per minute)
445	E 605.1.3.2 Different Occupant Density. E 605.1.4 System Type. E 605.1.5 Airflow Measurement. E 605.1.6 Control and Operation. E 605.1.7 Intermittent Mechanical Ventilation. E 605.1.7.1 Intermittent Ventilation. E 605.1.7.2 Extended-Cycle Intermittent Ventilation. Table 605.1.7.2 Mechanical Ventialtion Effectiveness (ε) for Intermittent Fans
446	E 605.1.8 Equivalent Ventilation. E 605.2 Bathroom Exhaust Fans. E 605.3 Filters. E 606.0 Indoor Air Quality for Other than Low-Rise Residential Buildings. E 606.1 Minimum Indoor Air Quality. E 607.0 Environmental Comfort. E 607.1 Thermal Comfort Controls. E 607.2 Heating and Air-Conditioning System Design. E 608.0 Low VOC Solvent Cement and Primer. E 608.1 General. E 608.1.1 Solvent Cement. E 608.1.2 Primer.
447	E 701.0 Installer Qualifications. E 701.1 Scope. E 702.0 Qualifications. E 702.1 General. Part I E 801.0 Heating, Ventilation, and Air Conditioning Systems Commissioning. E 801.1 Applicability E 802.0 Commissioning. E 802.1 Commissioning Requirements. E 802.2 Owner’s Project Requirements (OPR). E 802.3 Basis of Design (BOD). E 802.4 Commissioning Plan. E 802.5 Functional Performance Testing. E 802.6 Post Construction Documentation and Training. E 802.6.1 Systems Manual.
448	E 802.6.2 Systems Operations Training. E 802.7 Commissioning Report Part II E 803.0 Commissioning Acceptance. E 803.1 General. E 803.2 Construction Documents. E 803.2.1 Roles and Responsibilities. E 803.2.1.1 Field Technician. E 803.2.1.2 Responsible Person. E 803.2.1.3 Certificate of Acceptance. E 804.0 Commissioning Tests. E 804.1 General. E 804.2 Tests.
449	E 804.3 Acceptance Process. E 804.3.1 Plan Review. E 804.3.2 Construction Inspection. E 804.3.3 Acceptance Testing. E 804.3.4 Certificate of Occupancy. E 805.0 HVAC System Tests. E 805.1 Variable Air Volume Systems (Form MECH-2A). E 805.1.1 Test Procedure. E 805.1.1.1 Construction Inspection. E 805.1.1.2 Functional Testing.
450	E 805.1.2 Acceptance Criteria. E 805.2 Constant Volume Systems (Form MECH-2A). E 805.2.1 Test Procedure. E 805.2.1.1 Construction Inspection. E 805.2.1.2 Functional Testing. E 805.2.2 Acceptance Criteria. E 805.3 Constant Volume, Single-Zone, Unitary Air Conditioner and Heat Pumps Systems Acceptance (Form MECH-3A). E 805.3.1 Test Procedure. E 805.3.1.1 Construction Inspection. E 805.3.1.2 Functional Testing.
451	E 805.3.2 Acceptance Criteria. E 805.4 Air Distribution Systems (Form MECH-4A). E 805.4.1 Test Procedure. E 805.4.1.1 Construction Inspection. E 805.4.1.2 Functional Testing. E 805.4.2 Acceptance Criteria. E 805.5 Air Economizer Controls Acceptance (Form MECH-5A). E 805.5.1 Test Procedure. E 805.5.1.1 Construction Inspection.
452	E 805.5.1.2 Functional Testing. E 805.5.2 Acceptance Criteria. E 805.6 Demand-Controlled Ventilation Systems Acceptance (Form MECH-6A). E 805.6.1 Test Procedure. E 805.6.1.1 Construction Inspection. E 805.6.1.2 Functional Testing.
453	E 805.6.2 Acceptance Criteria. E 805.7 Supply Fan Variable Flow Controls (Form MECH-7A). E 805.7.1 Test Procedure. E 805.7.1.1 Construction Inspection. E 805.7.1.2 Functional Testing. E 805.7.2 Acceptance Criteria. E 805.8 Valve Leakage (Form MECH-8A).
454	E 805.8.1 Test Procedure. E 805.8.1.1 Construction Inspection. E 805.8.1.2 Functional Testing. E 805.8.2 Acceptance Criteria. E 805.9 Supply Water Temperature Reset Controls (Form MECH-9A). E 805.9.1 Test Procedure. E 805.9.1.1 Construction Inspection. E 805.9.1.2 Functional Testing. E 805.9.2 Acceptance Criteria. E 805.10 Hydronic System Variable Flow Controls (Form MECH-10A). E 805.10.1 Test Procedure.
455	E 805.10.1.1 Construction Inspection. E 805.10.1.2 Functional Testing. E 805.10.2 Acceptance Criteria. E 805.11 Automatic Demand Shed Control (Form MECH-11A). E 805.11.1 Test Procedure. E 805.11.1.1 Construction Inspection. E 805.11.1.2 Functional Testing. E 805.11.2 Acceptance Criteria. E 805.12 Fault Detection and Diagnostics (FDD) for Packaged Direct-Expansion (DX) Units (Form MECH-12A). E 805.12.1 Test Procedure. E 805.12.1.1 Construction Inspection.
456	E 805.12.1.2 Functional Testing. E 805.12.2 Acceptance Criteria. E 805.13 Automatic Fault Detection Diagnostics (FDD) for Air Handling Units (AHU) and Zone Terminal Units (Form MECH-13A). E 805.13.1 Test Procedure. E 805.13.1.1 Functional Testing. E 805.13.1.1.1 Functional Testing for Air Handling Units.
457	E 805.13.1.1.2 Functional Testing for Zone Terminal Units. E 805.13.2 Acceptance Criteria. E 805.14 Distributed Energy Storage DX AC System (Form MECH-14A). E 805.14.1 Test Procedure. E 805.14.1.1 Construction Inspection.
458	E 805.14.1.2 Functional Testing. E 805.14.1.3 Calibrating Controls. E 805.14.2 Acceptance Criteria. E 805.15 Thermal Energy Storage (TES) System (Form MECH-15A). E 805.15.1 Test Procedure. E 805.15.1.1 Construction Inspection.
459	E 805.15.1.2 Functional Testing. E 805.15.2 Acceptance Criteria. E 806.0 Certificate of Acceptance Forms. E 806.1 General.
460	MECH-2A
463	MECH-3A
466	MECH-4A
469	MECH-5A
472	MECH-6A
475	MECH-7A
477	MECH-8A
479	MECH-9A
481	MECH-10A
484	MECH-11A
486	MECH-12A
489	MECH-13A
493	MECH-14A
496	MECH-15A
500	Appendix F – Sizing of Venting Systems and Outdoor Combustion and Ventilation Opening Design
502	F 101.0 General. F 101.1 Examples Using Single Appliance Venting Tables. TABLES FIGURES FIGURE F 101.1(1) Type B Double-Wall Vent System Serving a Single Appliance with a Type B Double-Wall Vent Figure F 101.1(2) Type B Double-Wall Vent System Serving a Single Appliance with a Single-Wall Metal Vent Connector Figure F 101.1(3) Vent System Serving a Single Appliance with a Masonry Chimney and a Type B Double Wall Vent Connector Figure F 101.1(4) Vent System Serving a Single Appliance Using a Masonry Chimney and a Single-Wall Metal Vent Connector
503	Figure F 101.1(5) Asbestos Cement Type B or Single-Wall Metal Vent System Serving a Single Draft Hood-Equipped Appliance Figure F 101.1(6) Vent System Serving Two or More Appliances with Type B Double-Wall Vent and Type B Double-Wall Vent Connectors Figure F 101.1(7) Vent System Serving Two or More Appliances with Type B Double-Wall Vent and Single-Wall Metal Vent Connectors Figure F 101.1(8) Masonry Chimney Serving Two or More Appliances with Type B Double-Wall Vent Connectors
504	Figure F 101.1(9) Masonry Chimney Serving Two or More Appliances with Single-Wall Metal Vent Connectors Figure F 101.1(10) Asbestos Cement Type B or Single-Wall Metal Vent Systems Serving Two or More Draft Hood-Equipped Appliances Figure F 101.1(11) Use of Manifolded Common Vent Connectors Figure F 101.1(12) Use of Offset Common Vent
505	F 101.2 Example 1: Single Draft Hood-Equipped Appliance. Figure F 101.1(13) Multistory Gas Vent Design Procedure for Each Segment of System Figure F 101.1(14) Principles of Design of Multistory Vents Using Vent Connector and Common Vent Design Tables
506	F 101.3 Example 2: Single Fan-Assisted Appliance. F 101.4 Example 3: Interpolating Between Table Values. F 102.0 Examples Using Common Venting Tables. F 102.1 Example 4: Common Venting Two Draft Hood-Equipped Appliances. Figure F 101.1 Single Draft Hood-Equipped Appliance Example 1 Figure F 101.2 Single Fan-Assisted Appliance Example 2
507	F 102.2 Example 5(a): Common Venting a Draft Hood-Equipped Water Heater with a Fan-Assisted Furnace into a Type B Vent. Figure F 102.1 Common Venting Two Draft Hood-Equipped Appliances Example 4
508	F 102.3 Example 5(b): Common Venting into an Interior Masonry Chimney. F 102.4 Example 5(c): Common Venting into an Exterior Masonry Chimney. Figure F 102.2 Common Venting a Draft Hood-Equipped Water Heater with a Fan-Assisted Furnace into a Type B Double-Wall Common Vent Example 5(a)
509	Table F 102.3 Masonry Chimney Liner Dimensions with Circular Equivalents
510	103.0 Example of Combination Indoor and Outdoor Combustion Air Opening.
511	Table F 103.0 Standard Method: Required Volume, All Appliances
512	Appendix G – Example Calculation of Outdoor Air Rate
514	G 101.0 Example Calculation of Outdoor Air Rate. G 101.1 Example Calculation.
516	Index – A –
517	– B –
518	– C –
520	– D –
522	– E – – F –
524	– G – – H –
525	– I –
526	– J – – K – – L –
527	– M – – N – – O –
528	– P –
529	– R –
530	– S –
531	– T – – U – – V –
533	– W –
534	History Note

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CA	2016	537


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Standard Title	California Mechanical Code, Title 24, Part 4 (W/ ERRATA & SUPPLEMENT)
Published Code	CA
Publication Date	2016
Pages Count	537

CA CaliforniaMechanicalCode 2016 wERRATA

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