Chapter 17 — REFERENCED STANDARDS
1701.2 Standards, Publications, Practices, and Guides.
California Mechanical Code (Title 24, Part 4) · 2022 edition · updated 2026-09-10 · California
Italicized text is a California amendment to the model code, as printed in the official publication.
The standards, publications, practices and guides listed in Table 1701.2 are not referenced in other sections of this code. The
application of the referenced standards, publications, practices and guides shall be as specified in Section 302.1.2. The promulgating agency acronyms are found at the end of the table.
TABLE 1701.2 STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| ACCA Manual N-2012 | Commercial Load Calculations | Ducts |
| ACCA Manual Q-1990 | Low Pressure, Low Velocity Duct System Design | Ducts |
| AHRI 870-2016 | Performance Rating of Direct Geoexchange Heat Pumps | Heat Pumps |
| AHRI 1200-2013 | Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets |
Commercial Refrigerated Display Merchandisers and Storage Cabinets |
| AHRI 1230-2014a | Performance Rating of Variable Refrigerant Flow (VRF) Multi-Split Air-Condi- tioning and Heat Pump Equipment |
Refrigerants |
| AMCA 500-D-2018 | Laboratory Methods of Testing Dampers for Rating | Dampers |
| ASCE 25-2016 | Earthquake-Actuated Automatic Gas Shutoff Devices | Fuel Gas |
| ASHRAE 52.2-2012 | General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size |
Cleaning Devices |
| ASHRAE 55-2017 | Thermal Environmental Conditions for Human Occupancy | Miscellaneous |
| ASHRAE 62.2-2016 | Ventilation and Acceptable Indoor Air Quality in Residential Buildings | Ventilation |
| ASHRAE/IES 90.1-2016 | Energy Standard for Buildings Except Low-Rise Residential Buildings | Energy |
| ASHRAE/IES 90.2-2018 | Energy-Efficient Design of Low-Rise Residential Buildings | Energy, Dwellings |
| ASHRAE 127-2012 | Method of Testing for Rating Computer and Data Processing Room Unitary Air Conditioners |
Air Conditioners |
| ASHRAE/ACCA 183- 2007 (R2017) |
Peak Cooling and Heating Load Calculations in Buildings Except Low- Rise Residential Buildings |
Cooling and Heating Load, Miscellaneous |
| ASHRAE 194-2012 | Method of Test for Direct-Expansion Ground-Source Heat Pumps | Ground-Source Heat Pumps |
| ASHRAE Handbook-2016 | HVAC Systems and Equipment | Design |
| ASME A13.1-2015 | Scheme for the Identification of Piping Systems | Piping |
| ASME A112.18.6/CSA B125.6-2017 |
Flexible Water Connectors | Piping |
| ASME B1.20.3-1976 (R2018) | Dryseal Pipe Threads (Inch) | Joints |
| ASME B16.33-2012 (R2017) | Manually Operated Metallic Gas Valves for Use in Gas Piping Systems up to 175 psi (Sizes NPS1⁄2 through NPS 2) |
Valves |
| ASME B16.50-2018 | Wrought Copper and Copper Alloy Braze-Joint Pressure Fittings | Fittings |
| ASTM A568/A568M-2017a | Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for |
Piping |
| ASTM A653/A653M-2017 | Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvan- nealed) by the Hot-Dip Process |
Piping, Ferrous |
| ASTM A733-2016 | Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples | Piping, Ferrous |
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REFERENCED STANDARDS
TABLE 1701.2 (continued) STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| ASTM B370-2012 | Standard Specification for Copper Sheet and Strip for Building Construction | Miscellaneous |
| ASTM B687-1999 (R2016) | Brass, Copper, and Chromium-Plated Pipe Nipples | Piping, Copper Alloy |
| ASTM C518-2017 | Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus |
Certification: Calibration, Error Analysis, Heat Flow Meter Apparatus, Heat Flux, Instrument Verifica- tion, Thermal Conductiv- ity, Thermal Resistance, Thermal Testing, Tunnel Test |
| ASTM D93-2018 | Flash Point by Pensky-Martens Closed Cup Tester | Certification |
| ASTM D396-2018a | Fuel Oils | Boiler |
| ASTM D2517-2018 | Reinforced Epoxy Resin Gas Pressure Pipe and Fittings | Piping, Plastic |
| ASTM E96/E96M-2016 | Water Vapor Transmission of Materials | Miscellaneous |
| ASTM E136-2016a | Behavior of Materials in a Vertical Tube Furnace at 750°C | Furnace |
| AWS B2.4-2012 | Welding Procedure and Performance Qualification for Thermoplastics | Joints, Certification |
| CSA/IGSHPA C448-2016 | Design and Installation of Ground Source Heat Pump Systems for Commercial and Residential Buildings |
Miscellaneous |
| CSA C448.1-2016 | Design and Installation of Ground Source Heat Pump Systems for Commer- cial and Institutional Buildings |
Ground-Source Heat Pumps |
| CSA C448.2-2016 | Design and Installation of Ground Source Heat Pump Systems for Residen- tial and Other Small Buildings |
Ground-Source Heat Pumps |
| CSA Z21.1-2016 | Household Cooking Gas Appliances | Household Cooking Appliances, Gas Fired |
| CSA Z21.5.1-2017 | Gas Clothes Dryers, Volume I, Type 1 Clothes Dryers (same as CSA 7.1) | Fuel Gas, Appliances |
| CSA Z21.5.2-2016 | Gas Clothes Dryers,Volume II, Type 2 Clothes Dryers (same as CSA 7.2) | Fuel Gas, Appliances |
| CSA Z21.11.2-2016 | Gas-Fired Room Heaters, Volume II, Unvented Room Heaters | Room Heaters, Unvented Heaters |
| CSA Z21.12b-1994 (R2015) | Draft Hoods | Fuel Gas, Appliances |
| CSA Z21.13-2017 | Gas-Fired Low Pressure Steam and Hot Water Boilers (same as CSA 4.9) | Fuel Gas, Appliances |
| CSA Z21.15b-2013 (R2014) | Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves (same as CSA 9.1b) |
Fuel Gas |
| CSA Z21.17a-2008 (R2014) | Domestic Gas Conversion Burners (same as CSA 2.7a) | Conversion Burner Instal- lation, Gas Burners |
| CSA Z21.18b-2012 (R2016) |
Gas Appliance Pressure Regulators (same as CSA 6.3b) | Appliance Regulators, Gas Refrigerators, Pres- sure Regulators |
| CSA Z21.19-2014 | Refrigerators Using Gas Fuel (same as CSA 1.4) | Gas Refrigerators, Refrig- erators |
| CSA Z21.20a-2008 (R2016) |
Automatic Gas Ignition Systems and Components | Automatic Ignition, Gas Ignition, Ignition |
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REFERENCED STANDARDS
TABLE 1701.2 (continued) STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| CSA Z21.21-2015 | Automatic Valves for Gas Appliances (same as CSA 6.5) | Appliance Valves, Auto- matic Gas Valves, Valves |
| CSA Z21.22-2015 | Relief Valves for Hot Water Supply Systems (same as CSA 4.4) | Valves |
| CSA Z21.40.1a- 1997/CGA 2.91a-M97 (R2017) |
Gas-Fired, Heat Activated Air-Conditioning and Heat Pump Appliances | Gas Fired Air Condi- tioning, Gas Fired Heat Pump |
| CSA Z21.42-2013 | Gas-Fired Illuminating Appliances | Illuminating Appliances |
| CSA Z21.47-2016 | Gas-Fired Central Furnaces (same as CSA 2.3) | Fuel Gas, Appliances |
| CSA Z21.50-2016 | Vented Decorative Gas Appliances (same as CSA 2.22) | Appliances, Decorative Appliances |
| CSA Z21.56-2017 | Gas-Fired Pool Heaters (same as CSA 4.7) | Fuel Gas, Swimming Pools, Spas, and Hot Tubs |
| CSA Z21.58-2018 | Outdoor Cooking Gas Appliances (same as CSA 1.6) | Cooking Appliances |
| CSA Z21.60-2017 | Decorative Gas Appliances for Installation in Solid-Fuel Burning Fireplaces (same as CSA 2.26) |
Decorative Appliances, Decorative Fireplace Appliances |
| CSA Z21.61-1983 (R2013) | Gas-Fired Toilets | Toilets |
| CSA Z21.66-2015 | Automatic Damper Devices for Use with Gas-Fired Appliances (same as CSA 6.14) |
Vent Dampers, Automatic Dampers |
| CSA Z21.71a-2005 (R2016) |
Automatic Intermittent Pilot Ignition Systems for Field Installation | Automatic Pilot Ignition, Pilot Ignition |
| CSA Z21.86-2016 | Vented Gas-Fired Space Heating Appliances (same as CSA 2.32) | Fuel Gas Appliances |
| CSA Z21.88-2017 | Vented Gas Fireplace Heaters (same as CSA 2.33) | Fireplace Heaters |
| CSA Z83.8-2016 | Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters, and Gas-Fired Duct Furnaces (same as CSA 2.6) |
Fuel Gas Appliances |
| CSA Z83.11-2016 | Gas Food Service Equipment (same as CSA 1.8) | Fuel Gas, Appliances |
| CSA Z83.19-2017 | Gas-Fired High-Intensity Infrared Heaters (same as CSA 2.35) | High Intensity Heaters, Infrared Heaters |
| CSA Z83.20-2016 | Gas-Fired Low-Intensity Infrared Heaters (same as CSA 2.34) | Infrared Heaters, Low Intensity Heaters |
| IAPMO IGC 293-2012 | Tubing and Fittings for Special Hydronic Radiant Drywall Panels | HVAC, Fittings, Tubing |
| IAPMO IGC 315-2016 | Water Manifold Systems | Fittings |
| IAPMO IGC 327-2016 | Flexible Metallic Expansion Joints for Pressure Systems | Joints |
| IAPMO IGC 332-2017a | Hydronic Radiators | Miscellaneous |
| IAPMO PS 120-2004 | Flashing and Stand Combination for Air Conditioning Units (Residential or Commercial Unit Curb) |
Air Conditioning Flashing Stand |
| ISO 13256-1-1998 (R2012) | Water Source Heat Pumps-Testing and Rating for Performance-Water-to-Air and Brine-to-Air Heat Pumps |
Water-Source Heat Pumps |
| ISO 13256-2-1998 | Water Source Heat Pumps-Testing and Rating for Performance-Water-to-Water and Brine-to-Water Heat Pumps |
Water-Source Heat Pumps |
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REFERENCED STANDARDS
TABLE 1701.2 (continued) STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| MSS SP-67-2017 | Butterfly Valves | Valves |
| MSS SP-80-2013 | Bronze Gate, Globe, Angle, and Check Valves | Valves |
| MSS SP-104-2018 | Wrought Copper Solder-Joint Pressure Fittings | Fittings |
| MSS SP-106-2012 | Cast Copper Alloy Flanges and Flanged Fittings: Class 125, 150, and 300 | Fittings |
| MSS SP-109-2018 | Weld-Fabricated Copper Solder-Joint Pressure Fittings | Fittings |
| NFPA 30-2018 | Flammable and Combustible Liquids Code | Combustible Liquids, Flammable Liquids |
| NFPA 91-2015 | Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids |
Product Conveying Ducts |
| NFPA 96-2017 | Ventilation Control and Fire Protection of Commercial Cooking Operations | Commercial Cooking |
| NFPA 221-2018 | High Challenge Fire Walls, Fire Walls, and Fire Barrier Walls | Building Fire Walls, Fire Barrier |
| NFPA 259-2018 | Test Method for Potential Heat of Building Materials | Testing, Building Mate- rials |
| NFPA 274-2018 | Test Method to Evaluate Fire Performance Characteristics of Pipe Insulation | Pipe Insulation |
| NFPA 501A-2017 | Fire Safety Criteria for Manufactured Home Installations, Sites, and Commu- nities |
Miscellaneous |
| NFPA 5000-2018 | Building Construction and Safety Code | Miscellaneous |
| NGWA-01-2014 | Water Well Construction Standard | Water Wells |
| NSF 60-2017 | Drinking Water Treatment Chemicals - Health Effects | Miscellaneous |
| NSF 358-4-2018 | Polyethylene of Raised Temperature (PE-RT) Tubing and Fittings for Water-Based Ground-Source (Geothermal) Heat Pump Systems |
Ground-Source Heat Pumps |
| SAE J512-1997 | Automotive Tube Fittings |
Fittings |
| SMACNA-2003 | Fibrous Glass Duct Construction Standard, 7thEdition | Fiberglass Ducts |
| SMACNA-2008 | IAQ Guidelines for Occupied Buildings Under Construction, 2ndEdition | Ventilation |
| UL 21-2014 | LP-Gas Hose (with revisions through July 28, 2017) | Hose, LPG Hose |
| UL 33-2010 | Heat Responsive Links for Fire-Protection Service (with revisions through April 14, 2015) |
Fusible Links |
| UL 51-2013 | Power-Operated Pumps and Bypass Valves for Anhydrous Ammonia, LP- Gas, and Propylene (with revisions through October 5, 2018) |
Ammonia Pumps, LP- Gas Pumps, Pumps |
| UL 80-2007 | Steel Tanks for Oil-Burner Fuels and Other Combustible Liquids (with revi- sions through January 16, 2014) |
Fuel Gas |
| UL 125-2014 | Flow Control Valves for Anhydrous Ammonia and LP-Gas (with revisions through January 12, 2018) |
Fuel Gas |
| UL 132-2015 | Safety Relief Valves for Anhydrous Ammonia and LP-Gas (with revisions through January 12, 2018) |
Fuel Gas |
| UL 144-2012 | LP-Gas Regulators (with revisions through November 05, 2014) | Fuel Gas |
| UL 174-2004 | Household Electric Storage Tank Water Heaters (with revisions through Decem- ber 15, 2016) |
Appliances |
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REFERENCED STANDARDS
TABLE 1701.2 (continued) STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| UL 180-2012 | Liquid-Level Gauges for Oil Burner Fuels and other combustible liquids (with revisions through May 12, 2017) |
Gauges, Level Gauges |
| UL 252-2017 | Compressed Gas Regulators (with revisions through August 10, 2018) | Fuel Gas |
| UL 343-2008 | Pumps for Oil-Burning Appliances (with revisions through December 14, 2017) | Fuel Gas, Appliances |
| UL 353-1994 | Limit Controls (with revisions through November 8, 2011) | Controls |
| UL 404-2010 | Gauges, Indicating Pressure, for Compressed Gas Service (with revisions through February 11, 2015) |
Fuel Gas |
| UL 429-2013 | Electrically Operated Valves | Valves |
| UL 443-2006 | Steel Auxiliary Tanks for Oil-Burner Fuel (with revisions through March 8, 2013) |
Fuel Gas |
| UL 525-2008 | Flame Arresters (with revisions through October 13, 2017) | Flame Arrestors |
| UL 565-2013 | Liquid-Level Gauges for Anhydrous Ammonia and LP-Gas (with revisions through February 23, 2018) |
Fuel Gas |
| UL 569-2013 | Pigtails and Flexible Hose Connectors for LP-Gas (with revisions through July 28, 2017) |
Fuel Gas |
| UL 732-2018 | Oil-Fired Storage Tank Water Heaters (with revisions through August 9, 2018) | Fuel Gas, Appliances |
| UL 733-1993 | Oil-Fired Air Heaters and Direct-Fired Heaters (with revisions through October 9, 2013) |
Water Heaters, Direct Fired, Oil Fired |
| UL 842-2015 | Valves for Flammable Fluids (with revisions through October 27, 2017) | Valves |
| UL 984-1996 | Hermetic Refrigerant Motor-Compressors (with revisions through September 23, 2005) |
Compressors, Refrigera- tion |
| UL 1453-2016 | Electric Booster and Commercial Storage Tank Water Heaters (with revisions through May 18, 2018) |
Appliances |
| UL 1746-2007 | External Corrosion Protection Systems for Steel Underground Storage Tanks (with revisions through December 19, 2014) |
Tanks |
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REFERENCED STANDARDS
ABBREVIATIONS IN TABLE 1701.1 AND TABLE 1701.2
AABC Associated Air Balance Council, 1220 19th Street NW, Suite 410, Washington, DC 20036. ACCA Air Conditioning Contractors of America Association, Inc., 2800 S Shirlington Road, Suite 300, Arlington, VA 22206. AHRI Air-Conditioning, Heating, and Refrigeration Institute, 2311 Wilson Boulevard, Suite 400, Arlington, VA 22201. AMCA Air Movement and Control Association, 30 West University Drive, Arlington Heights, IL 60004-1806. ANSI American National Standards Institute, Inc., 25 W. 43rd Street, 4th Floor, New York, NY 10036. ASCE American Society of Civil Engineers, 1801 Alexander Bell Drive, Reston, VA 20191-4400. ASHRAE American Society of Heating, Refrigerating, and Air Conditioning Engineers, Inc., 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. ASME American Society of Mechanical Engineering, Two Park Avenue, New York, NY 10016-5990. ASSE American Society of Sanitary Engineering, 18927 Hickory Creek Drive, Suite 220, Mokena, IL 60448. ASTM ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. AWS American Welding Society, 8669 NW 36 Street, #130, Miami, FL 33166-6672. AWWA American Water Works Association, 6666 W. Quincy Avenue, Denver, CO 80235. CFR Code of Federal Regulations, U.S Government Publishing Office, 723 North Capitol Street, N.W. Washington, DC 20401-001. CGA Canadian Gas Association, 243 Consumers Road, Suite 1200, North York, Ontario, Canada M2J 5E3. CSA Canadian Standards Association, 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3.
e1 An editorial change since the last revision or reapproval.
IAPMO International Association of Plumbing and Mechanical Officials, 4755 E. Philadelphia Street, Ontario, CA 91761. IES Illuminating Engineering Society, 120 Wall St. Fl 17, New York, NY 10005-4026. IGSHPA International Ground Source Heat Pump Association, 1723 W. Tyler Ave. Stillwater, OK 74078. IIAR International Institute of Ammonia Refrigeration, 1001 N. Fairfax Street, Suite 503, Alexandria, VA 22314. ISO International Organization for Standardization, 1 ch. de la Voie-Creuse, Casa Postale 56, CH-1211 Geneva 20, Switzerland. MSS Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street NE, Vienna, VA 22180. NEBB National Environmental Balancing Bureau, 8575 Grovemont Circle, Gaithersburg, MD 20877. NFPA National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471. NGWA National Ground Water Association, 601 Dempsey Road, Westerville, Ohio 43081-8978. NSF NSF International, 789 N. Dixboro Road, Ann Arbor, MI 48105. SAE Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096. SMACNA Sheet Metal and Air Conditioning Contractors National Association, 4201 Lafayette Center Drive, Chantilly, VA 20151-1219. UL Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062.
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APPENDICES
The appendices are intended to supplement the provisions of the installation requirements of this code. The definitions in Chapter 2 are also applicable to the appendices.
TABLE OF CONTENTS
Appendix A Page
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
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CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE
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Ask AI about this code▸Contents — California Mechanical Code (Title 24, Part 4)
- Chapter 1 — GENERAL CODE PROVISIONS
- Chapter 2 — DEFINITIONS
- Chapter 3 — GENERAL REGULATIONS
- Chapter 4 — VENTILATION AIR
- Chapter 5 — EXHAUST SYSTEMS
- Chapter 6 — DUCT SYSTEMS
- Chapter 7 — COMBUSTION AIR
- Chapter 8 — CHIMNEYS AND VENTS
- Chapter 9 — INSTALLATION OF SPECIFIC APPLIANCES
- Chapter 10 — BOILERS AND PRESSURE VESSELS
- Chapter 11 — REFRIGERATION
- Chapter 12 — HYDRONICS
- Chapter 13 — FUEL GAS PIPING
- Chapter 14 — PROCESS PIPING
- Chapter 15 — SOLAR ENERGY SYSTEMS
- Chapter 16 — STATIONARY POWER PLANTS
▸Chapter 17 — REFERENCED STANDARDS
- Appendix A — RESIDENTIAL PLAN EXAMINER REVIEW FORM FOR HVAC SY…
- Appendix B — PROCEDURES TO BE FOLLOWED TO PLACE GAS EQUIPMENT …
- Appendix C — INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIR…
- Appendix D — FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND R…
- Appendix E — SUSTAINABLE PRACTICES
- Appendix F — GEOTHERMAL ENERGY SYSTEMS
- Appendix G — SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION …
- Appendix H — EXAMPLE CALCULATION OF OUTDOOR AIR RATE