The 2019 edition of the California Mechanical Code (CMC©) represents the most current approaches in the mechanical field. This code is embedded with the 2018 Edition of the Uniform Mechanical Code (UMC©) with the California amendments. It is the sixth 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 2019 CMC include: New clearance requirements for solid-fuel burning appliances, ducts serving Type I hood exhaust system, and product conveying ducts (Chapter 3) New provisions for Type I and Type II exhaust systems and product conveying ducts (Chapter 5) New sizing provisions for duct systems; duct leakage testing requirements; installations and closure requirements for flexible air ducts; and new provisions for air dispersion systems (Chapter 6) New requirements for pressure regulators and electric furnaces (Chapter 9) New refrigerant system requirements, such as A2L and B2L low flammability refrigerants; machinery room requirements such as access, openings, detectors, and ventilation systems; and new pressure limiting-device provisions for compressors (Chapter 11) New pressure testing requirements for piping and components, expansion tanks, and materials for hydronic systems (Chapter 12) New requirements for piping material, overpressure protection, and gas piping installation for fuel gas piping systems (Chapter 13)

PDF Catalog

PDF Pages	PDF Title
1	Cover
3	Copyright
4	2019 California Mechanical Code – SUPPLEMENT July 1, 2021
6	PREFACE
7	California Agency Information Contact List
8	How to Distinguish Between Model Code Language and California Amendments
10	CALIFORNIA MATRIX ADOPTION TABLES
12	HOW TO DISTINGUISH MODEL CODE LANGUAGE FROM CALIFORNIA AMENDMENTS
15	FORMAT OF THE UNIFORM MECHANICAL CODE
20	COMMITTEE ON UNIFORM MECHANICAL CODE
21	SECTION RELOCATION
23	RELATED PUBLICATIONS AND SERVICES
26	TABLE OF CONTENTS
46	CHAPTER 1 ADMINISTRATION
62	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. 102.8 Appendices.
63	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.
72	CHAPTER 2 DEFINITIONS 201.0 General. 201.1 Applicability. 202.0 Definition of Terms. 202.1 General. 203.0 – A – Absorption Unit.
73	204.0 – B – Baffle Plate.
74	205.0 – C – CAS Number.
76	206.0
77	207.0 – E – Easily Accessible. 208.0 – F – Fabrication Area (Fab Area).
78	209.0 – G – Galvanized Steel.
79	210.0 – H – Hazardous Location. 211.0 – I – IDLH (Immediately Dangerous to Life and Health).
80	212.0 – J – Joint, Brazed. 213.0 – K – 214.0
81	215.0 – M – Machinery. 216.0 217.0 – O – Occupancy.
82	218.0 – P – Package Boiler.
83	219.0 – Q – Qualified. 220.0 – R – Radiant Room Heater.
84	221.0 – S – Seam, Welded.
85	222.0 – T – Termination, Duct. 223.0 – U – 224.0 – V – Vacuum.
86	225.0 – W – Wall Heater. 226.0 – X – 227.0 – Y – 228.0 – Z – Zeotropic.
90	CHAPTER 3 GENERAL REGULATIONS 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.
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.
92	303.5 Movement. 303.6 Identification of Equipment. 303.7 Liquefied Petroleum Gas Facilities. 303.8 Appliances on Roofs. 303.8.1 Load Capacity. 303.8.2 Fasteners. 303.8.3 Installation of 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. 303.10.1.1 Type I Hood Exhaust System. 303.10.1.2 Product Conveying Ducts. 303.10.1.3 Solid-Fuel Burning Appliances. 303.11 Installation in Commercial Garages.
93	303.11.1 Repair Garages. 303.12 Installation in Aircraft Hangars. 303.13 Pit Location. 304.0 Accessibility for Service. 304.1 General. 304.2 Sloped Roof. 304.3 Access to Appliances on Roofs. 304.3.1 Access. 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.
94	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. 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.
95	307.2 Electric Heating Appliances. 307.3 Heat Pump and Electric Cooling Appliances. 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.
96	310.2 Condensate Control. 310.2.1 Protection of Appurtenances. 310.3 Condensate Waste Pipe Material and Sizing. 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.
97	311.3 Prohibited Source. 311.4 Return-Air Limitations. 312.0 Plumbing Connections. 312.1 General. 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.
98	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. 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.
106	CHAPTER 4 VENTILATION AIR 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.
107	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. 402.4 Outdoor Air Intake Protection. 402.4.1 Weather Protections. 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.
108	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. 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.
109	403.7.2 Enclosed Parking Garages. 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.
110	404.3.1 Single Supply Systems. 404.3.2 Secondary-Recirculation Systems.
128	CHAPTER 5 EXHAUST SYSTEMS 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. 503.2 Fans. 504.0 Environmental Air Ducts. 504.1 General. 504.1.1 Backdraft Protection.
129	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. 504.4.2.3 Exhaust Duct Power Ventilators. 504.4.3 Commercial Clothes Dryers. 504.4.3.1 Exhaust Ducts for Type 2 Clothes Dryers.
130	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 Mechanical Ventilation. 505.2 Incompatible Materials. 505.3 Flammability Limit. 505.3.1 Higher Concentrations. 505.3.2 Ovens and Furnaces. 505.3.3 Deflagration. 505.4 Air-Moving Devices. 505.5 Generating Flames, Sparks, or Hot Materials. 505.6 Fire Dampers.
131	505.6.1 Prohibited. 505.7 Fire Detection and Alarm Systems. 505.7.1 Automatic Extinguishing System. 505.7.2 Shut Down Permitted. 505.8 Product-Conveying Ducts Classification. 505.9 Minimum Velocities and Circulation. 505.10 Makeup Air. 505.11 Hoods and Enclosures.
132	506.0 Product-Conveying Ducts. 506.1 Materials. 506.2 Construction. 506.3 Penetrations. 506.3.1 Fire Barriers.
134	506.3.2 Protection. 506.4 Condensate. 506.4.1 Drainage. 506.5 Fittings. 506.6 Explosion Venting.
135	506.7 Supports. 506.8 Fire Protection. 506.8.1 Loads. 506.8.2 Corrosion. 506.8.3 Vibration and Stress. 506.8.4 Expansion and Contraction. 506.9 Protection from Physical Damage.
136	506.10 Duct Clearances. 506.10.1 Protection Provided. 506.10.2 Systems Conveying Combustible Materials 506.10.3 Reduced Clearance Permitted. 506.10.4 Clearance Increases. 506.10.4.1 Temperatures Over 900°F. 506.10.4.2 Clearance Reduction. 506.11 Clearance Reduction Methods. 506.11.1 Spacers and Ties. 506.11.2 Wool Batts Insulation. 506.11.3 Insulation Board. 506.11.4 Duct and Thermal Shield. 506.11.5 Thermal Shield and Combustible Surface 506.11.6 Reduce Clearance with Air Gaps. 506.11.6.1 Air Circulation. 506.11.6.2 Single Flat Wall. 506.11.6.3 Thermal Shielding.
138	507.2 Exhaust System. 507.3 Listed Devices. 507.3.1 Penetration. 507.4 Clearance. 507.4.1 Listed. 507.4.2 Clearance Reduction. 507.4.2.1 Mineral Wool Batts or Ceramic Fiber Blanket. 507.4.2.2 Field-Applied Grease Duct Enclosure 507.4.2.3 Zero Clearance. 507.4.3 Clearance Integrity.
139	507.4.3.1 Fire. 507.4.3.2 Required Protection. 507.4.3.3 Protection Methods. 507.4.4 Factory Built. 507.4.5 Field Applied. 507.4.6 Both Field-Applied and Factory Built. 507.4.6.1 Physical Damage. 507.4.6.2 Specification. 507.4.6.3 Clearance Options. 507.4.7 Building and Structural Contact. 507.4.7.1 Corrosion Protection. 507.4.7.2 Zero Clearance. 507.4.8 Clearance Between Duct and Interior Surfaces. 507.5 Drawings. 507.6 Notification of Change.
140	508.0 Type I 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. 508.3.1 Grease Vapor. 508.3.2 Seams, Joints, and Penetrations. 508.3.2.1 Sealed. 508.3.3 Eyebrow-Type Hoods. 508.3.3.1 Duct Connection. 508.3.4 Insulation.
141	508.3.5 Exhaust Hood Assemblies with Integrated Supply-Air Plenums. 508.3.5.1 Outer Shell. 508.3.5.2 Inner Shell. 508.3.5.3 Fire Dampers. 508.3.5.3.1 Listing. 508.3.5.3.2 Actuating Temperature. 508.3.5.3.3 Exemption. 508.4 Supports. 508.5 Hood Size. 508.5.1 Canopy Size and Location. 508.5.1.1 Capacity of Hoods. 508.5.1.2 Extra-Heavy-Duty Cooking Appliances 508.5.1.3 Heavy-Duty Cooking Appliances.
142	508.5.1.4 Medium-Duty Cooking Appliances. 508.5.1.5 Light-Duty Cooking Appliances. 508.5.2 Noncanopy-Type Hoods. 508.5.2.1 Installation. 508.5.2.2 Capacity. 508.5.3 Labeling. 508.6 Solid-Fuel Hood Assemblies. 508.7 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.
143	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. 509.2.4 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. 510.1.6 Bracing and Supports. 510.1.7 Type I Exhaust Duct Systems. 510.2 Clearance.
144	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. 510.5.2 Factory-Built Grease Ducts. 510.5.3 Installation.
145	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. 510.7.4 Mechanical and Structural Integrity.
147	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. 510.9.1.1 Listed Flexible Connectors. 510.9.1.2 Inspection and Cleaning.
148	510.9.2 Wall Terminations. 510.10 Solid-Fuel Duct Systems. 511.0 Air Movement. 511.1 Exhaust Fans for Commercial Cooking Operations 511.1.1 Upblast Fans. 511.1.2 In-Line Exhaust Fans.
149	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. 511.2.3 Operation.
150	511.3 Makeup Air. 511.3.1 Air Balance.
151	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. 513.0 Fire-Extinguishing Equipment. 513.1 General. 513.1.1 Protection.
152	513.2 Types of Equipment. 513.2.1 Identification. 513.2.3 Installation. 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.
153	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.
154	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. 514.2.4 Temperature-Sensing Elements.
155	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.
156	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. 516.2.8 Power Supply.
157	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. 517.1.3 Makeup Air System.
158	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. 517.5 Grease Removal Devices for Solid-Fuel Cooking. 517.5.1 Spark Arrester Devices.
159	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. 517.8.1 Site-Built Solid Fuel Cooling Appliances.
160	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. 519.0 Type II Hood Exhaust System Requirements. 519.1 Where Required. 519.2 Construction of Type II Hoods. 519.3 Dishwashing Appliances.
161	519.4 Type II Exhaust Duct Systems. 519.5 Termination of Type II Hood Exhaust System. 519.6 Makeup Air.
164	CHAPTER 6 DUCT SYSTEMS 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 Discrete Products in Plenums. 602.3 Metal. 602.4 Phenolic. 602.5 Gypsum. 602.6 Factory-Made Air Ducts.
165	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. 603.4.1 Length Limitation. 603.5 Flexible Air Ducts.
166	603.6 Plastic Ducts. 603.7 Protection of Ducts. 603.8 Support of Ducts. 603.9 Protection Against Flood Damage. 603.10 Joints and Seams of Ducts. 603.10.1 Duct Leakage Tests. 603.11 Cross Contamination. 603.12 Underground Installation.
167	603.13 Air Dispersion Systems. 604.0 Insulation of Ducts. 604.1 General. 604.1.1 Within Ducts or Plenums. 604.1.2 Duct Coverings and Linings. 605.0 Smoke Dampers, Fire Dampers, and Ceiling Dampers. 605.1 Smoke Dampers. 605.2 Fire Dampers. 605.3 Ceiling Radiation Dampers.
168	605.4 Multiple Arrangements. 605.5 Access and Identification. 605.6 Freedom from Interference. 605.7 Temperature Classification of Operating Elements 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. 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.
169	607.10 Exterior Wall and Interior Stud Partitions. 607.11Wall 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.
172	CHAPTER 7 COMBUSTION AIR 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.
173	701.6.2 One Permanent Opening Method. 701.7 Combination Indoor and Outdoor Combustion Air. 701.7.1 Indoor Openings.
174	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.
175	701.11 Combustion Air Ducts. 701.12 Dampers Prohibited. 702.0 Extra Device or Attachment. 702.1 General.
178	CHAPTER 8 CHIMNEYS AND VENTS 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 Maximum Input Rating. 802.2.3 Adjacent Room or Space. 802.2.4 Ventilating Hoods. 802.2.5 Well-Ventilated Spaces. 802.2.6 Direct-Vent Appliances. 802.2.7 Appliances with Integral Vents. 802.2.8 Incinerators. 802.3 Design and Construction. 802.3.1 Appliance Draft Requirements. 802.3.2 Appliance Venting Requirements.
179	802.3.3 Mechanical Draft Systems. 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. 802.3.6 Above-Ceiling or Nonducted Air Handling System. 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. 802.5.1.1 Decorative Shrouds. 802.5.1.2 Listing Requirements. 802.5.2 Metal Chimneys. 802.5.3 Masonry Chimneys.
180	802.5.4 Termination.
181	802.5.4.1 Medium-Heat Gas Appliances. 802.5.4.2 Chimney Height. 802.5.4.3 Decorative Shrouds. 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.
182	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 Gasand 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. 802.6 Gas Vents. 802.6.1 Termination Requirements.
183	802.6.1.1 Type B and L Vents. 802.6.1.2 Type B-W Vents. 802.6.1.3 Exterior Wall Termination. 802.6.1.4 Decorative Shrouds. 802.6.1.5 Termination Cap. 802.6.1.6 Forced Air Inlet. 802.6.1.7 Insulation Shield. 802.6.2 Size of Gas Vents. 802.6.2.1 Category I Appliances. 802.6.2.2 Vent Offsets.
184	802.6.2.3 Category II, Category III, and Category IV Appliances. 802.6.2.4 Sizing. 802.6.3 Gas Vents Serving Appliances on More than One Floor. 802.6.3.1 Occupiable Space. 802.6.3.2 Multistory Venting System. 802.6.4 Support of Gas Vents. 802.6.5 Marking.
185	802.7 Single-Wall Metal Pipe. 802.7.1 Cold Climate. 802.7.2 Termination. 802.7.3 Installation with Appliances Permitted by Section 802.4. 802.7.3.1 Limitations. 802.7.3.2 Attic or Concealed Space. 802.7.3.3 Clearances. 802.7.3.4 Combustible Exterior Wall. 802.7.3.5 Roof Thimble.
186	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 Category I through Category IV and Noncategorized Appliances. 802.8.4 Annular Spaces. 802.8.5 Vent Terminals.
187	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.
188	802.10.1.3 Non-Residential Low-Heat Appliances 802.10.1.4 Medium-Heat Appliances. 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.
189	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. 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.
190	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. 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.
191	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. 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.
192	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). 803.2.1 Vent Connector Maximum Length. 803.2.2 Vent Connector Exceeding Maximum Length.
193	803.2.3 Vent Connector Manifold. 803.2.4 Vent Offset. 803.2.5 Elbow Reduction. 803.2.6 Elbows in Connectors. 803.2.7 Common Vent Minimum Size. 803.2.8 Tee and Wye Fittings. 803.2.9 Size of Fittings. 803.2.10 High-Altitude Installations. 803.2.11 Connector Rise. 803.2.12 Vent Height. 803.2.13 Multistory Installations. 803.2.14 Size of Vents for Multistory Installations
194	803.2.15 Vent Type Multistory Installation. 803.2.16 Offsets in Multistory Installations. 803.2.17 Vertical Vent Size Limitation. 803.2.18 Multiple Input Ratings. 803.2.19 Corrugated Metallic Chimney Liner Reduction. 803.2.20 Chimneys and Vents.
195	803.2.21 Vent Connector Sizing. 803.2.22 Combination of Pipe Types and Sizes. 803.2.23 Multiple Connector and Vent Sizes. 803.2.24 Interpolation. 803.2.25 Extrapolation. 803.2.26 Engineering Methods. 803.2.27 Height Entries.
224	CHAPTER 9 INSTALLATION OF SPECIFIC APPLIANCES 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 Appliances. 902.4 Type of Gas(es). 902.5 Safety Shutoff Devices for Unlisted LP-Gas Appliance Used Indoors. 902.6 Fuel Input Rate. 902.7 Use of Air or Oxygen Under Pressure. 902.8 Building Structural Members. 902.8.1 Structural Capacity. 902.9 Flammable Vapors. 902.10 Solid-Fuel Burning Appliances. 902.11 Combination of Appliances and Equipment. 902.12 Protection of Gas Appliances from Fumes or Gases Other than Products of Combustion.
225	902.13 Process Air. 902.14 Gas Appliance Pressure Regulators. 902.15 Venting of Gas Appliance Pressure Regulators 902.16 Bleed Lines for Diaphragm-Type Valves. 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.
226	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. 904.2 Clearance. 904.2.1 Listed Units. 904.2.2 Unlisted Units. 904.2.3 Listed and Unlisted Units. 904.2.4 Front Clearance. 904.2.5 Adjacent to Plaster or Noncombustible Materials. 904.2.6 Interference. 904.2.7 Supply Air Ducts to Listed Furnaces.
227	904.2.8 Supply Air Ducts to Unlisted Furnaces. 904.2.9 Central Heating Furnaces. 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. 904.4 Temperatureor 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.
228	904.7 Furnace Plenums and Air Ducts. 904.7.1 Supplied as a Part of Furnace. 904.7.2 Not Supplied with the Furnace. 904.7.3 Return Air. 904.8 Refrigeration Coils. 904.9 Cooling Units Used with Heating Boilers. 904.9.1 Exposed to Refrigerated Air Circulation. 904.10 Furnace (Upright and Horizontal). 904.11 Solid-Fuel-Fired Furnaces. 904.12 Oil-Fired Central Furnaces. 904.13 Commercial or Industrial Gas Heaters. 904.14 Electric Central Furnaces. 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.
229	905.6 Duct Furnaces Used with Refrigeration Systems 905.6.1 In Conjunction with Cooling Appliances. 905.6.2 Located Upstream from Cooling Coils. 905.6.3 Heat Exchangers. 905.7 Installation in Commercial Garages and Aircraft Hangars. 905.8 Electric Duct Heaters. 905.8.1 Installation. 905.8.2 Clearance. 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.
230	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. 907.0 Wall Furnaces. 907.1 Installation. 907.1.1 Unlisted Wall Furnaces. 907.1.2 Vented Wall Furnaces. 907.1.3 Direct Vent Wall Furnaces.
231	907.1.4 Panels, Grilles, and Access Doors. 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. 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. 911.2.1 Listed Decorative Appliance. 911.2.2 911.2.3 Unlisted Decorative Appliance. 911.3 Fireplace Screens. 912.0 Gas Fireplaces, Vented. 912.1 Prohibited Installations. 912.2 Installation.
232	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. 914.3.1 Industrial or Commercial Occupancies. 914.3.2 Fresh Air Ventilation. 914.3.3 Access Required. 914.4 Clearance from Combustible Materials. 914.5 Air Supply. 914.6 Atmospheric Vents, Gas Reliefs, or Bleeds.
233	914.7 Relief Openings. 914.7.1 Infiltration Rate. 914.7.2 Louver or Gravity Dampers. 914.8 Purging. 915.0 Recirculating Direct Gas-Fired Industrial Air Heaters. 915.1 Application. 915.2 Prohibited Installations. 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. 915.7.1 Infiltration Rate. 915.7.2 Louver or Gravity Dampers. 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.
234	916.2.2 Installations in Institutions. 916.2.3 Clearance. 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.
235	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. 918.3.1 Not Listed for Mounting on Combustible Floors. 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.
236	919.3 Clearance for Unlisted Appliances. 919.4 Mounting of Unlisted Appliances. 920.0 Household Cooking Appliances. 920.1 Electric Household Cooking Appliances. 920.2 Gas-Fired Household Cooking Appliances. 920.3 Floor-Mounted Units. 920.3.1 Clearance from Combustible Material. 920.3.2 Vertical Clearance Above Cooking Top. 920.4 Built-In Units. 920.4.1 Installation. 920.4.2 Vertical Clearance.
237	920.4.3 Horizontal Clearance. 920.4.4 Level Installation. 921.0 Cooking Appliances Listing. 921.1 Commercial Electric Ranges. 921.2 Commercial Wood-Fired Baking Ovens. 921.3 Oil-Burning Ranges. 922.0 Open-Top Broiler Units. 922.1 Listed Units. 922.2 Unlisted Units. 922.3 Protection Above Domestic Units. 922.4 Commercial Units. 923.0 Outdoor Cooking Appliances. 923.1 Listed Units. 923.2 Unlisted Units. 924.0 Illuminating Appliances. 924.1 Clearances for Listed Appliances. 924.2 Clearances for Unlisted Appliances. 924.2.1 Open-Flame Type.
238	924.3 Mounting on Buildings. 924.4 Mounting on Posts. 924.5 Appliance Pressure Regulators. 925.0 Incinerators and Crematories. 925.1 Field Constructed Commercial-Industrial Incinerators. 925.2 Factory-Built Commercial Crematories. 925.3 Residential Incinerators. 926.0 Infrared Heaters. 926.1 Support. 926.2 Clearance. 926.3 Combustion and Ventilation Air. 926.3.1 Exhaust Openings. 926.4 Installation in Commercial Garages and Aircraft Hangars. 927.0 Pool Heaters. 927.1 Location. 927.2 Clearance. 927.3 Temperature or Pressure-Limiting Devices. 927.3.1 Pressure Relief Valve.
239	927.4 Bypass Valves. 927.5 Venting. 928.0 Refrigerators. 928.1 Clearance. 928.2 Venting or Ventilating Kits Approved for Use with a Refrigerator. 929.0 Gas-Fired Toilets. 929.1 Clearance. 929.2 Installation on Combustible Floors. 929.3 Vents. 930.0 Appliances for Installation in Manufactured Housing. 930.1 General. 931.0 Small Ceramic Kilns. 931.1 General. 931.2 Installation. 931.3 Fuel-Gas Controls. 931.4 Electrical Equipment. 931.5 Installations Inside Buildings. 931.5.1 Kiln Clearances. 931.5.2 Hoods. 931.5.3 Gravity Ventilation Ducts. 931.5.4 Makeup Air.
240	931.5.5 Hood and Duct Clearances. 931.6 Exterior Installations. 932.0 Outdoor Open Flame Decorative Appliances. 932.1 General. 932.1.1 Listed Units. 932.1.2 Unlisted Units. 932.1.3 Connection to the Piping System. 933.0 Evaporative Cooling Systems. 933.1 General. 933.2 Location. 933.3 Access, Inspection, and Repair. 933.4 Installation. 933.4.1 Modifications to the Supporting Structure. 933.4.2 On the Ground. 933.4.3 On a Platform. 934.0 Refrigeration Appliances. 934.1 Self-Contained Refrigerators and Freezers. 934.2 Unit Coolers. 934.3 Self-Contained Mechanical Refrigeration Systems 935.0 Ductless Mini-Split Systems Installation. 935.1 General. 936.0 Air Filter Appliances. 936.1 Electrostatic Air Cleaners. 936.2 High-Efficiency Particulate Air Filter Units. 937.0 Gaseous Hydrogen Systems. 937.1 General. 938.0 Compressed Natural Gas (CNG) Vehicular Fuel Systems. 938.1 General.
244	CHAPTER 10 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-Fired Boilers. 1002.5 Dual Purpose Water Heater. 1003.0 Detailed Requirements. 1003.1 Safety Requirements.
245	1003.2 Controls. 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.
246	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.
247	1010.0 Clearance for Access. 1010.1 General. 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.
248	1013.5 Steam-Heating and Water-Heating Boilers. 1013.6 Automatic Steam-Heating Boilers. 1013.7 Unfired Pressure Vessels. 1014.0 Operation and Maintenance of Boilers and Pressure Vessels. 1014.1 General.
254	CHAPTER 11 1101.0 General. 1101.1 Applicability. 1101.2 Equipment. 1102.2 Ammonia Refrigeration Systems. 1102.3 Refrigerants. 1103.0 Classification. 1103.1 Classification of Refrigerants. 1103.1.1 Safety Group. 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.
255	1104.2.1 Volume Calculations. 1104.2.2 Nonconnecting Spaces. 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.
256	1104.7.2 Recycled Refrigerants. 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.
257	1105.5.1 Permanent Gravity Ventilation Openings 1105.5.2 Mechanical Exhaust System. 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 Refrigeration Machinery Room, General Requirements. 1106.2.1 Access.
258	1106.2.2 Openings. 1106.2.2.1 Detectors and Alarms. 1106.2.2.2 Refrigerant Detectors. 1106.2.3 Mechanical Ventilation. 1106.2.4 Ventilation. 1106.2.5 Emergency Ventilation-Required Airflow 1106.2.5.1 Ventilation A1, A2, A3, B1, B2L, B2 and B3 Refrigerants. 1106.2.5.2 Ventilation Group A2L Refrigerants
259	1106.3 Normal Operation. 1106.4 Natural Ventilation. 1106.5 Combustion Air. 1106.6 Airflow. 1106.7 Ventilation Intake. 1106.8 Maximum Temperature. 1106.9 Refrigerant Parts in Air Duct.
260	1106.10 Dimensions. 1106.11 Restricted Access. 1106.12 Exits. 1107.0 Machinery Room, Special Requirements. 1107.1 General. 1107.1.1 Flame-Producing Devices. 1107.1.2 Doors. 1107.1.3 Walls, Floors, and Ceilings. 1107.1.4 Machinery Rooms. 1107.1.5 Exterior Openings. 1107.1.6 Sealing. 1107.1.7 Group A2L and B2L Refrigerants. 1107.1.7.1 Mechanical Ventilation. 1107.1.7.2 Refrigeration Detectors. 1107.1.7.3 Machinery Rooms. 1107.1.8 Group A2, A3, B2, or B3 Refrigerants. 1107.1.9 Refrigeration Systems. 1107.1.10 Remote Control. 1108.0 Refrigeration Machinery Room Equipment and Controls. 1108.1 General. 1108.2 Electrical. 1108.3 Emergency Shut-off.
261	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 Copper Linesets. 1109.1.3 Iron and Steel. 1109.1.4 Prohibited Contact. 1109.2 Joints. 1109.3 Penetration of Piping. 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.
262	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. 1110.4 Access. 1110.5 Identification. 1111.0 Pressure-Limiting Devices. 1111.1 Where Required. 1111.2 Setting. 1111.3 Location. 1111.4 Emergency Stop. 1112.0 Pressure-Relief Devices. 1112.1 General.
263	1112.2 Positive Displacement Compressor. 1112.3 Liquid-Containing Portions of Systems. 1112.4 Evaporators. 1112.5 Hydrostatic Expansion. 1112.5.1 Hydrostatic Expansion During Normal Operation. 1112.5.2 Hydrostatic Expansion During Maintenance 1112.6 Actuation.
264	1112.7 Stop Valves Prohibited. 1112.8 Location. 1112.9 Materials. 1112.10 Pressure-Relief Device Settings. 1112.10.1 Rupture Member Setting. 1112.11 Discharge from Pressure-Relief Devices. 1112.11.1 Discharging Location Interior to Building 1112.11.2 Discharging Location Exterior to Building 1112.11.3 Internal Relief.
265	1112.11.4 Discharge Location, Special Requirements 1112.11.4.1 Water (R-718). 1112.12 Discharge Piping. 1112.12.1 Piping Connection. 1112.12.2 Pipe Size. 1112.12.3 Maximum Length. 1112.12.4 Design Back Pressure.
266	1112.12.5 Simultaneous Operation. 1112.13 Rating of Pressure-Relief Device. 1112.14 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. 1113.5 Discharge Capacity.
267	1113.6 Three-Way Valve. 1114.0 Special Discharge Requirements. 1114.1 General. 1114.2 Design Requirements. 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.
268	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.
269	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. 1118.0 Maintenance and Operation. 1118.1 General. 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.
270	1124.0 Electrical. 1124.1 General. 1125.0 Refrigerants and Hazardous Fluids. 1125.1 General. 1126.0 Drift Eliminators. 1126.1 General.
280	CHAPTER 12 1201.0 General. 1201.1 Applicability. 1201.2 Insulation. 1201.3 Water Hammer. 1201.4 Terminal Units. 1201.5 Return-Water Low-Temperature Protection. 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.
281	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. 1206.0 Pressure and Safety Devices. 1206.1 General. 1206.2 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. 1207.3.1 Temperature Limitations.
282	1207.4 Solar Heat Collector Systems. 1208.0 Circulators and Pumps. 1208.1 General. 1208.2 Mounting. 1208.3 Sizing. 1209.0 Expansion Tanks. 1209.1 General. 1209.2 Installation. 1209.3 Open-Type Expansion Tanks. 1209.4 Closed-Type Tanks. 1209.5 Sizing. 1210.0 Materials. 1210.1 Piping, Tubing, and Fittings. 1210.2 Expansion and Contraction. 1210.3 Hangers and Supports. 1210.4 Oxygen Diffusion Corrosion. 1211.0 Joints and Connections. 1211.1 General. 1211.2 Chlorinated Polyvinyl Chloride (CPVC) Pipe.
284	1211.3 CPVC/AL/CPVC Plastic Pipe and Joints. 1211.4 Copper or Copper Alloy Pipe and Tubing. 1211.5 Cross-Linked Polyethylene (PEX) Pipe.
285	1211.6 Cross-Linked Polyethylene/Aluminum/CrossLinked Polyethylene (PEX-AL-PEX) Pipe. 1211.7 Ductile Iron Pipe. 1211.8 Polyethylene (PE) Plastic Pipe/Tubing. 1211.9 Polyethylene/Aluminum/Polyethylene (PE-ALPE 1211.10 Polyethylene of Raised Temperature (PE-RT).
286	1211.11 Polypropylene (PP) Pipe. 1211.12 Polyvinyl Chloride (PVC) Pipe. 1211.13 Steel Pipe and Tubing. 1211.14 Joints Between Various Materials. 1211.14.1 Copper or Copper Alloy Pipe or Tubing to Threaded Pipe Joints. 1211.14.2 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.
287	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. 1213.0 System Controls. 1213.1 Water Temperature Controls. 1213.2 Operating Steam Controls. 1213.2.1 Water-Level Controls. 1213.3 Occupied Spaces. 1214.0 Pressure and Flow Controls. 1214.1 Balancing. 1214.2 Low-Water Control. 1214.3 Flow-Sensing Devices. 1214.4 Automatic Makeup Fluid. 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.
288	1215.3 Freeze Protection. 1215.4 Balancing. 1215.5 Heat Transfer Fluid. 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. 1217.1.1 Manifolds. 1217.2 Radiant Under-Floor Heating. 1217.3 Radiant Cooling Systems. 1217.4 Tube Placement. 1217.5 Poured Floor Structural Concrete Slab Systems (Thermal Mass). 1217.5.1 Slab Penetration Tube and Joint Protection
289	1217.5.2 Insulation. 1217.5.3 Joist Systems and Subfloors. 1217.5.4 Wall and Ceiling Panels. 1217.6 Radiant Heating and Cooling Panels. 1217.6.1 Electric Heating Panel Systems. 1217.6.2 Radiant Wall and Ceiling Panels. 1218.0 Heat Exchangers. 1218.1 General. 1219.0 Indirect-Fired Domestic Hot-Water Storage Tanks. 1219.1 General.
290	1220.0 Auxiliary Systems. 1220.1 Use of Chemical Additives and Corrosive Fluids 1220.2 Snow and Ice Melt Controls. 1220.2.1 Tube Placement. 1220.2.2 Poured Concrete Slab Systems (Thermal Mass). 1220.2.3 Slab Penetration Tube and Joint Protection 1220.2.4 Concrete Slab Preparation. 1220.2.5 Insulation. 1220.2.6 Testing and Flushing. 1220.3 Hydronic Makeup Air Units. 1221.0 Piping Installation. 1221.1 General. 1221.2 Embedded Piping Materials and Joints. 1221.2.1 Steel Pipe. 1221.2.2 Copper Tubing. 1221.2.3 Plastics.
291	1221.3 Pressure Testing. 1221.4 System Drainage. 1221.5 Condensate Drainage. 1221.6 Clearance to Combustibles.
294	CHAPTER 13 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.
295	1303.3.3 Test Gauges. 1303.3.3.1 Pressure Tests (10 psi or less). 1303.3.3.2 Pressure Tests (greater than 10 psi to 100 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
296	1308.3.1 Interconnections for Standby Fuels. 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.
297	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.
298	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.
299	1308.5.9.4 Liquefied Petroleum Gas Piping Systems. 1308.5.10 Flange Specification. 1308.5.10.1 Steel Flanges. 1308.5.10.2 Non-Ferrous Flanges. 1308.5.10.3 Ductile Iron Flanges. 1308.5.10.4 Dissimilar Flange Connections. 1308.5.10.5 Flange Facings. 1308.5.10.6 Lapped Flanges. 1308.5.11 Flange Gaskets. 1308.5.11.1 Flange Gasket Materials. 1308.5.11.2 Metallic Flange Gaskets. 1308.5.11.3 Non-Metallic Flange Gaskets. 1308.5.11.4 Full-Face Flange Gasket. 1308.5.11.5 Separated Flanges. 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 Listing. 1308.7.2 Location. 1308.7.3 Regulator Protection. 1308.7.4 Venting of Line Pressure Regulators.
300	1308.7.5 Venting of Gas Appliance Pressure Regulators 1308.7.6 Discharge of Vents. 1308.7.7 Bypass Piping. 1308.7.8 Identification. 1308.8 Overpressure Protection. 1308.9 Pressure Limitation Requirements. 1308.9.1 Overpressure Protection Required. 1308.9.2 Overpressure Protection Devices. 1308.9.3 Detection of Failure. 1308.9.4 Flow Capacity. 1308.10 Backpressure Protection.
301	1308.10.1 Protective Devices. 1308.11 Low-Pressure Protection. 1308.12 Shutoff Valves. 1308.13 Expansion and Flexibility. 1308.13.1 Special Local Conditions. 1309.0 Excess Flow Valve. 1309.1 General. 1310.0 Gas Piping Installation. 1310.1 Piping Underground. 1310.1.1 Cover Requirements. 1310.1.2 Trenches. 1310.1.2.1 Backfilling. 1310.1.3 Protection Against Corrosion. 1310.1.3.1 Zinc Coating. 1310.1.3.2 Underground Piping. 1310.1.3.3 Cathodic Protection. 1310.1.3.4 Sacrificial Anodes.
302	1310.1.3.5 System Failing Tests. 1310.1.3.6 Impressed Current Cathodic Protection 1310.1.3.7 Documentation. 1310.1.3.8 Dissimilar Metals. 1310.1.3.9 Steel Risers. 1310.1.4 Protection Against Freezing. 1310.1.5 Piping through Foundation Wall. 1310.1.6 Piping Underground Beneath Buildings. 1310.1.6.1 Conduit with One End Terminating Outdoors. 1310.1.6.2 Conduit with Both Ends Terminating Indoors. 1310.1.7 Plastic Piping. 1310.1.7.1 Connections Between Metallic and Plastic Piping. 1310.1.7.2 Tracer Wire. 1310.2 Installation of Piping.
303	1310.2.1 Building Structure. 1310.2.2 Gas Piping to be Sloped. 1310.2.2.1 Ceiling Locations. 1310.2.3 Prohibited Locations. 1310.2.4 Hangers, Supports, and Anchors. 1310.2.4.1 Spacing. 1310.2.4.2 Expansion and Contraction. 1310.2.4.3 Piping on Roof Tops. 1310.2.5 Removal of Piping. 1310.3 Concealed Piping in Buildings. 1310.3.1 Connections. 1310.3.2 Piping in Partitions. 1310.3.3 Tubing in Partitions. 1310.3.4 Piping in Floors.
304	1310.4 Piping in Vertical Chases. 1310.4.1 Pressure Reduction. 1310.4.2 Construction. 1310.4.3 Ventilation. 1310.5 Maximum Design Operating Pressure. 1310.5.1 LP-Gas Systems. 1310.6 Appliance Overpressure Protection. 1310.7 Gas Pipe Turns. 1310.7.1 Metallic Pipe. 1310.7.2 Plastic Pipe.
305	1310.7.3 Elbows. 1310.8 Drips and Sediment Traps. 1310.8.1 Location of Drips. 1310.8.2 Sediment Traps. 1310.9 Outlets. 1310.9.1 Cap Outlets. 1310.9.1.1 Appliance Shutoff Valves. 1310.10 Branch Pipe Connection. 1310.11 Manual Gas Shutoff Valves. 1310.11.1 Valves Controlling Multiple Systems. 1310.11.1.1 Shutoff Valves for Multiple House Lines. 1310.11.2 Emergency Shutoff Valves. 1310.11.3 Shutoff Valve for Laboratories. 1310.12 Prohibited Devices.
306	1310.13 Systems Containing Gas-Air Mixtures Outside the Flammable Range. 1310.14 Systems Containing Flammable Gas-Air Mixtures. 1310.14.1 Required Components. 1310.14.2 Optional Components. 1310.14.3 Additional Requirements. 1310.14.4 Special Requirements for Mixing Blowers. 1310.14.5 Installation of Gas-Mixing Machines. 1310.14.6 Use of Automatic Firechecks, Safety Blowouts, or Backfire Preventers.
307	1311.0 Electrical Bonding and Grounding. 1311.1 Pipe and Tubing Other than CSST. 1311.2 Bonding of CSST Gas Piping. 1311.2.1 Bonding Jumper Connection. 1311.2.2 Bonding Jumper Size. 1311.2.3 Bonding Jumper Length. 1311.2.4 Bonding Connections. 1311.2.5 Devices Used for Bonding. 1311.3 Grounding Conductor of Electrode. 1311.4 Lightning Protection System. 1311.5 Electrical Circuits. 1311.6 Electrical Connections. 1311.6.1 Safety Control. 1312.0 Appliance Connections to Building Piping. 1312.1 Connecting Appliances and Equipment. 1312.1.1 Commercial Cooking Appliances. 1312.1.2 Restraining Device. 1312.2 Suspended Low-Intensity Infrared Tube Heaters.
308	1312.3 Use of Gas Hose Connectors. 1312.3.1 Indoor. 1312.3.2 Outdoor. 1312.4 Injection (Bunsen) Burners. 1312.5 Connection of Portable and Mobile Industrial Appliances. 1312.5.1 Swivel Joints or Couplings. 1312.5.2 Metal Flexible Connectors. 1312.5.3 Flexible Connectors. 1312.6 Appliance Shutoff Valves and Connections. 1312.7 Quick-Disconnect Devices. 1312.8 Gas Convenience Outlets. 1312.9 Sediment Trap.
309	1312.10 Installation of Piping. 1312.11 Liquefied Petroleum Gas Facilities and Piping 1313.0 Pressure Testing and Inspection. 1313.1 Piping Installations. 1313.1.1 Inspection Requirements. 1313.1.2 Repairs and Additions. 1313.1.3 New Branches. 1313.1.4 Piping System. 1313.1.5 Regulators and Valves. 1313.1.6 Test Medium. 1313.2 Test Preparation. 1313.2.1 Pipe Joints. 1313.2.2 Expansion Joints. 1313.2.3 Appliances and Equipment. 1313.2.4 Designed for (less than) Operating Pressures. 1313.2.5 Designed for (equal to or more than) Operating Pressures. 1313.2.6 Safety. 1313.3 Test Pressure.
310	1313.4 Detection of Leaks and Defects. 1313.4.1 Detecting Leaks. 1313.4.2 Repair or Replace. 1313.5 Piping System Leak Test. 1313.5.1 Turning Gas On. 1313.5.2 Leak Check. 1313.5.3 Placing Appliances and Equipment in Operation. 1313.6 Purging Requirements. 1313.6.1 Piping Systems Required to be Purged Outdoors. 1313.6.1.1 Removal from Service. 1313.6.1.2 Placing in Operation. 1313.6.1.3 Outdoor Discharge of Purged Gases.
311	1313.6.1.4 Combustible Gas Indicator. 1313.6.2 Piping Systems Allowed to be Purged Indoors or Outdoors. 1313.6.2.1 Purging Procedure. 1313.6.2.2 Combustible Gas Detector. 1313.6.3 Purging Appliances and Equipment. 1314.0 Required Gas Supply. 1314.1 General. 1314.2 Volume. 1314.3 Gas Appliances. 1314.4 Size of Piping Outlets. 1315.0 Required Gas Piping Size. 1315.1 Pipe Sizing Methods. 1315.1.1 Longest Length Method. 1315.1.2 Branch Length Method.
312	1315.1.3 Hybrid Pressure. 1315.2 Tables for Sizing Gas Piping Systems. 1315.3 Sizing Equations. 1315.4 Sizing of Piping Sections. 1315.5 Engineering Methods. 1315.6 Variable Gas Pressures.
352	CHAPTER 14 PROCESS PIPING 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.
353	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.
356	CHAPTER 15 SOLAR ENERGY SYSTEMS 1501.0 General. 1501.1 Applicability.
360	CHAPTER 16 STATIONARY POWER PLANTS 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.
364	CHAPTER 17 REFERENCED STANDARDS 1701.0 General. 1701.1 Standards.
375	1701.2 Standards,Publications,Practices,andGuides.
384	APPENDIX A RESIDENTIAL PLAN EXAMINER REVIEW FORM FOR HVAC SYSTEM DESIGN
388	APPENDIX B PROCEDURES TO BE FOLLOWED TO PLACE GAS EQUIPMENT IN OPERATION
392	APPENDIX C INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIRED EQUIPMENT
400	APPENDIX D FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL VEHICLE PARKS
408	APPENDIX E FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL VEHICLE PARKS
518	APPENDIX F SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION AND VENTILATION OPENING DESIGN
530	APPENDIX G EXAMPLE CALCULATION OF OUTDOOR AIR RATE
532	INDEX
550	HISTORY NOTE APPENDIX

Published By	Publication Date	Number of Pages
CA	2019	553


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Standard Title	California Mechanical Code, Title 24, Part 4 (W/ ERRATA & SUPPLEMENT)
Published Code	CA
Publication Date	2019
Pages Count	553

CA MechanicalCode 2019

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