Chapter 18 — REFERENCED STANDARDS
2025 California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-07-27 · California
Italicized text is a California amendment to the model code, as printed in the official publication.
(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
| Adopting Agency | BSC | BSC- CG |
SFM | HCD | DSA | OSHPD | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adopting Agency | BSC | BSC- CG |
SFM | 1 | 2 | 1-AC | AC | ** SS** | ** SS/CC** | 1 | 1R | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Adopt Entire Chapter | X | X | X | X | ||||||||||||||||||||
| Adopt Entire Chapter as amended (amended sections listed below) |
X | X | X | X | X | X | X | X | X | |||||||||||||||
| Adopt only those sections that are listed below |
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| Chapter/Section | ||||||||||||||||||||||||
| Table 1801.1 | X | X | X | X | X | X | X | X | X | X |
This state agency does not adopt sections identified with the following symbol: † The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
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»
»»
1801.0 General. ¶
1801.1 Standards. The standards listed in Table 1801.1 are ¶
referenced in various sections of this code and shall be con sidered part of the requirements of this document. The standards are listed herein by the standard number and effective date, the title, application and the section(s) of this code that
CHAPTER 18
REFERENCED STANDARDS
reference the standard. The application of the referenced standard(s) shall be as specified in Section 302.1.2. The promulgating agency acronym referred to in Table 1801.1 are defined in a list found at the end of the table.
TABLE 1801.1
REFERENCED STANDARDS
«
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REFERENCED STANDARDS
» TABLE 1801.1 (continued) REFERENCED STANDARDS
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REFERENCED STANDARDS
TABLE 1801.1 (continued) « REFERENCED STANDARDS
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REFERENCED STANDARDS
» TABLE 1801.1 (continued) REFERENCED STANDARDS
364 2025 CALIFORNIA MECHANICAL CODE
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REFERENCED STANDARDS
TABLE 1801.1 (continued) « REFERENCED STANDARDS
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REFERENCED STANDARDS
» TABLE 1801.1 (continued) REFERENCED STANDARDS
366 2025 CALIFORNIA MECHANICAL CODE
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REFERENCED STANDARDS
TABLE 1801.1 (continued) « REFERENCED STANDARDS
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REFERENCED STANDARDS
» TABLE 1801.1 (continued) REFERENCED STANDARDS
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REFERENCED STANDARDS
TABLE 1801.1 (continued) « REFERENCED STANDARDS
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REFERENCED STANDARDS
» TABLE 1801.1 (continued) REFERENCED STANDARDS
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REFERENCED STANDARDS
TABLE 1801.1 (continued) « REFERENCED STANDARDS
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REFERENCED STANDARDS
» TABLE 1801.1 (continued) REFERENCED STANDARDS
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REFERENCED STANDARDS
TABLE 1801.1 (continued) « REFERENCED STANDARDS
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REFERENCED STANDARDS
» TABLE 1801.1 (continued) REFERENCED STANDARDS
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REFERENCED STANDARDS
TABLE 1801.1 (continued) « REFERENCED STANDARDS
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REFERENCED STANDARDS
» TABLE 1801.1 (continued) REFERENCED STANDARDS
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REFERENCED STANDARDS
TABLE 1801.1 (continued) « REFERENCED STANDARDS
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REFERENCED STANDARDS
» 1801.2 Standards, Publications, Practices, and Guides. and guides shall be as specified in Section 302.1.2. The prom The standards, publications, practices and guides listed in Table ulgating agency acronyms are found at the end of the table. 1801.2 are not referenced in other sections of this code. The application of the referenced standards, publications, practices
»
TABLE 1801.2
| STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES | ||
|---|---|---|
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
| ACCA | ACCA | ACCA |
| ACCA Manual N-2012 | Commercial Load Calculations | Ducts |
| ACCA Manual Q-1990 | Low Pressure, Low Velocity Duct System Design | Ducts |
| AHAM | AHAM | AHAM |
| AHAM RAC-1-2020 | Energy Measurement Test Procedure for Room Air Conditioners | Air Conditioners |
| AHRI | AHRI | AHRI |
| AHRI 310/380-2017 | Packaged Terminal Air Conditioners and Heat Pumps (Same as CSA C744) | Air Conditioners |
| AHRI 340/360-2019 | Performance Rating of Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment |
Air-Source Heat Pumps |
| AHRI 390-2021 | Performance Rating of Single Package Vertical Air-Conditioners and Heat Pumps |
Air Conditioners |
| AHRI 400-2015 | Performance Rating of Liquid to Liquid Heat Exchangers | Heat Exchangers |
| AHRI 550/590-2020 | Performance Rating of Water-Chilling and Heat Pump Water-Heating Pack- ages Using the Vapor Compression Cycle |
Water-Source Heat Pumps |
| AHRI 560-2000 | Absorption Water Chilling and Water Heating Packages | Refrigeration Systems |
| AHRI 910-2014 | Performance Rating of Indoor Pool Dehumidifiers | Dehumidifiers |
| AHRI 920-2020 | Performance Rating of Direct Expansion-Dedicated Outdoor Air System Units | Air Conditioners |
| AHRI 1200-2013 | Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets |
Commercial |
| AHRI 1230-2021 | Performance Rating of Variable Refrigerant Flow (VRF) Multi-Split Air-Condi- tioning and Heat Pump Equipment |
Refrigerants |
| AHRI 1250-2020 | Performance Rating of Walk-in Coolers and Freezers | Walk-in Coolers and Freezers |
| AHRI 1360-2017 | Performance Rating of Computer and Data Processing Room Air Conditioners | Air Conditioners |
| AMCA | AMCA | AMCA |
| AMCA 208-2018 | Calculation of the Fan Energy Index | Fan Energy Index |
| ANSI/AMCA 210- 2016/ASHRAE 51-2016 |
Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating |
Low Power Fans |
| ANSI/AMCA 220-2021 | Laboratory Methods of Testing Air Curtain Units for Aerodynamic Perform- ance Rating |
Air Curtain Units |
| AMCA 500-D-2018 | Laboratory Methods of Testing Dampers for Rating | Dampers |
| ASHRAE | ASHRAE | ASHRAE |
| ASHRAE 52.2-2017 | Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size |
Cleaning Devices |
| ASHRAE 55-2020 | Thermal Environmental Conditions for Human Occupancy | Miscellaneous |
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REFERENCED STANDARDS
TABLE 1801.2 (continued) « STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| ASHRAE 62.2-2022 | Ventilation and Acceptable Indoor Air Quality in Residential Buildings | Ventilation |
| ANSI/ASHRAE/IES 90.1- 2019 |
Energy Standard for Buildings Except Low-Rise Residential Buildings (with Addenda a and d) |
Energy |
| ASHRAE/IES 90.2-2018 | Energy-Efficient Design of Low-Rise Residential Buildings | Energy, Dwellings |
| ASHRAE 90.4-2019 | Energy Standard for Data Centers | Data Centers |
| ASHRAE 127-2020 | Method of Testing for Rating Air-Conditioning Units Serving Data Center (DC) and Other Information Technology Equipment (ITE) Spaces |
Air Conditioners |
| ASHRAE 129-1997 (R2002) | Measuring Air-Change Effectiveness | Air Change Effectiveness |
| ASHRAE GRP 158-1979 | Cooling and Heating Load Calculation Manual | Ventilation |
| ASHRAE 169-2021 | Climatic Data for Building Design Standards | Miscellaneous |
| ASHRAE/ACCA 183- 2007 (R2020) |
Peak Cooling and Heating Load Calculations in Buildings Except Low- Rise Residential Buildings |
Cooling and Heating Load, Miscellaneous |
| ASHRAE Handbook-2020 | HVAC Systems and Equipment | Design |
| ASHRAE Indoor Air Quality Guide |
Indoor Air Quality Guide: Best Practices for Design, Construction, and Com- missioning |
Ventilation |
| ASME | ASME | ASME |
| ASME A13.1-2020 | Scheme for the Identification of Piping Systems | Piping |
| ASME A112.18.6/CSA B125.6-2017 (R2021) |
Flexible Water Connectors | Piping |
| ASME B1.20.3-1976 (R2018) | Dryseal Pipe Threads (Inch) | Joints |
| ASSE | ASSE | ASSE |
| ASSE/IAPMO/ANSI Series 12000-2021 |
Professional Qualifications Standard for Water Management and Infection Control Risk Assessment for Building Systems |
Professional Qualifications |
| ASSE 12010-2021 | Environment of Care, Infection Control and Construction Risk Assessment Professional Qualification Standard |
Professional Qualifications |
| ASSE 12020-2021 | Environment of Care, Infection Control and Construction Risk Assessment Professional Qualification Standard for Construction and Maintenance Employers |
Professional Qualifications |
| ASSE 12062-2021 | Water Quality Program Professional Qualifications Standard for Pipefitters and HVAC Technicians |
Professional Qualifications |
| ASSE 12080-2021 | Professional Qualifications Standard for Legionella Water Safety and Manage- ment Specialist |
Professional Qualifications |
| ASSE/IAPMO/ANSI Series 13000-2015 (R2020) |
Service Plumber and Residential Mechanical Service Technician Professional Qualifications Standard |
Professional Qualifications |
| ASSE/IAPMO/ANSI 13020- 2015 (R2020) |
Professional Qualifications Standard for the Residential Mechanical Service Technician |
Professional Qualifications |
| ASSE/IAPMO/ANSI Series 16000-2019 |
Professional Qualifications Standard for Inspectors and Plans Examiners | Professional Qualifications |
| ASSE/IAPMO/ANSI 16020- 2019 |
Professional Qualifications Standard for the Mechanical Inspector | Professional Qualifications |
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REFERENCED STANDARDS
» TABLE 1801.2 (continued) STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| ASSE/IAPMO/ANSI 16050- 2019 |
Professional Qualifications Standard for the Mechanical Plan Examiner | Professional Qualifications |
| ASSE/IAPMO/ANSI Series 19000-2015 (R2020) |
Hydronic Systems Professional Qualifications Standard | Professional Qualifications |
| ASSE/IAPMO/ANSI 19110- 2015 (R2020) |
Professional Qualifications Standard for the Solar Water Heating System Installer |
Professional Qualifications |
| ASSE/IAPMO/ANSI 19210- 2015 (R2020) |
Professional Qualifications Standard for the Hydronic Heating and Cooling System Installer |
Professional Qualifications |
| ASSE/IAPMO/ANSI 19220- 2015 (R2020) |
Professional Qualifications Standard for the Hydronic Heating and Cooling System Designer |
Professional Qualifications |
| ASTM | ASTM | ASTM |
| ASTM A568/A568M-2019a | Standard Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for |
Piping |
| ASTM A653/A653M-2020 | Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process |
Piping, Ferrous |
| ASTM A733-2016 | Standard Specification for Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples |
Piping, Ferrous |
| ASTM B370-2012 (R2019) | Standard Specification for Copper Sheet and Strip for Building Construction | Miscellaneous |
| ASTM B687-1999 (R2016) | Standard Specification for Brass, Copper, and Chromium-Plated Pipe Nipples | Piping, Copper Alloy |
| ASTM C518-2021 | Standard Test Method for 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 D93-2020 | Standard Test Method for Flash Point by Pensky-Martens Closed Cup Tester | Certification |
| ASTM D396-2021 | Standard Specification for Fuel Oils | Boiler |
| ASTM D2517-2018 | Standard Specification for Reinforced Epoxy Resin Gas Pressure Pipe and Fit- tings |
Piping, Plastic |
| ASTM E96/E96M-2016 | Standard Test Method for Water Vapor Transmission of Materials | Miscellaneous |
| ASTM E136-2019a | Standard Test Method for Assessing Combustibility of Materials Using a Ver- tical Tube Furnace at 750°C |
Furnace |
| AWS | AWS | AWS |
| AWS B2.4-2012 | Welding Procedure and Performance Qualification for Thermoplastics | Joints, Certification |
| CFR | CFR | CFR |
| 10 CFR 430 | Energy Conservation Program for Consumer Products | Energy Conservation |
| 10 CFR 431 | Energy Efficiency Program for Certain Commercial and Industrial Equipment | Energy Efficiency |
| 10 CFR 431.62 | Definitions Concerning Commercial Refrigerators, Freezers and Refrigerator- Freezers |
Commercial Refrigerators, Freezers and Refrigerator- Freezers |
| 10 CFR 431.86 | Uniform Test Method for the Measurement of Energy Efficiency of Commer- cial Packaged Boilers |
Boilers |
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REFERENCED STANDARDS
TABLE 1801.2 (continued) « STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| 10 CFR 431.302 | Definitions Concerning Walk-In Coolers and Walk-In Freezers | Walk-in Coolers and Freezers |
| 29 CFR 1910.134 | Respiratory Protection | Respiratory Protection |
| 49 CFR 192 | Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards |
Gas Piping |
| 49 CFR 192.123 | Design Limitations for Plastic Pipe | Piping, Plastic |
| CGSB | CGSB | CGSB |
| CAN/CGSB 149.10-2019 | Determination of the Airtightness of Building Envelopes by the Fan Depres- surization Method |
Ventilation |
| CSA | CSA | CSA |
| ANSI Z21.12b-1994 (R2020) | Draft Hoods | Fuel Gas, Appliances |
| ANSI Z21.17a-2008/(R2019) /CSA 2.7a-2008 (R2019) |
Domestic Gas Conversion Burners | Conversion Burner Instal- lation, Gas Burners |
| ANSI Z21.20-2014 (R2019)/CAN/CSA-C22.2 No. 60730-2-5-2014 (R2019) |
Automatic Electrical Controls for Household and Similar Use – Part 2-5: Particular Requirements for Automatic Electrical Burner Control Systems |
Automatic Ignition, Gas Ignition, Ignition |
| CSA/ANSI Z21.21- 2019/CSA 6.5-2019 |
Automatic Valves for Gas Appliances | Appliance Valves, Auto- matic Gas Valves, 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/ANSI Z21.42-2013 (R2018) |
Gas-Fired Illuminating Appliances | Illuminating Appliances |
| ANSI Z21.66-2015/(R2020) /CSA 6.14-2015 (R2020) |
Automatic Damper Devices for Use with Gas-Fired Appliances | Vent Dampers, Automatic Dampers |
| CSA Z21.71a-2005 (R2016) |
Automatic Intermittent Pilot Ignition Systems for Field Installation | Automatic Pilot Ignition, Pilot Ignition |
| IAPMO | IAPMO | IAPMO |
| ASSE/IAPMO/ANSI Series 16000-2019 |
Professional Qualifications Standard for Inspectors and Plans Examiners | Professional Qualifications |
| ASSE/IAPMO/ANSI Series 13000-2015 (R2020) |
Service Plumber and Residential Mechanical Service Technician Professional Qualifications Standard |
Professional Qualifications |
| ASSE/IAPMO/ANSI Series 19000-2015 (R2020) |
Hydronic Systems Professional Qualifications Standard | Professional Qualifications |
| ASSE/IAPMO/ANSI Series 12000-2021 |
Professional Qualifications Standard for Water Management and Infection Control Risk Assessment for Building Systems |
Professional Qualifications |
| IAPMO IGC 293-2012 (R2020) |
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 120-2019 | Flashing and Stand Combination for Air Conditioning Units (Residential or Commercial Unit Curb) |
Air Conditioning Flashing Stand |
| IES | IES | IES |
| ANSI/ASHRAE/IES 90.1- 2019 |
Energy Standard for Buildings Except Low-Rise Residential Buildings (with Addenda a and d) |
Energy |
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REFERENCED STANDARDS
» TABLE 1801.2 (continued) STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| MSS | MSS | MSS |
| MSS SP-67-2017 | Butterfly Valves | Valves |
| MSS SP-80-2019 | Bronze Gate, Globe, Angle, and Check Valves | Valves |
| MSS SP-104-2018 | Wrought Copper Solder-Joint Pressure Fittings | Fittings |
| MSS SP-106-2019 | 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 | NFPA | NFPA |
| NFPA 30-2021 | Flammable and Combustible Liquids Code | Combustible Liquids, Flammable Liquids |
| NFPA 55-2020 | Compressed Gases and Cryogenic Fluids Code | Compressed Gases |
| NFPA 91-2020 | Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids |
Product Conveying Ducts |
| NFPA 96-2021 | Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations |
Commercial Cooking |
| NFPA 221-2021 | Standard for High Challenge Fire Walls, Fire Walls, and Fire Barrier Walls | Building Fire Walls, Fire Barrier |
| NFPA 259-2018 | Standard Test Method for Potential Heat of Building Materials | Testing, Building Mate- rials |
| NFPA 274-2018 | Standard Test Method to Evaluate Fire Performance Characteristics of Pipe Insulation |
Pipe Insulation |
| NFPA 400-2019 | Hazardous Materials Code | Hazardous Materials |
| NFPA 501A-2021 | Standard for Fire Safety Criteria for Manufactured Home Installations, Sites, and Communities |
Miscellaneous |
| NFPA 704-2017 | Standard System for the Identification of the Hazards of Materials for Emer- gency Response |
Hazardous Materials |
| NFPA 2001-2018 | Clean Agent Fire Extinguishing Systems | Fire Extinguishing |
| NFPA 5000-2021 | Building Construction and Safety Code | Miscellaneous |
| SAE | SAE | SAE |
| SAE J512-1997 | Automotive Tube Fittings | Fittings |
| SMACNA | SMACNA | SMACNA |
| SMACNA-2008 | IAQ Guidelines for Occupied Buildings Under Construction, 2ndEdition | Ventilation |
| UL | UL | UL |
| UL 21-2014 | LP-Gas Hose (with revisions through July 28, 2017) | Hose, LPG Hose |
| UL 33-2021 | Heat Responsive Links for Fire-Protection Service | 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 April 26, 2019) |
Fuel Gas |
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REFERENCED STANDARDS
TABLE 1801.2 (continued) « STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
| DOCUMENT NUMBER | DOCUMENT TITLE | APPLICATION |
|---|---|---|
| UL 125-2020 | Flow Control Valves for Anhydrous Ammonia and LP-Gas (with revisions through August 26, 2021) |
Fuel Gas |
| UL 132-2021 | Safety Relief Valves for Anhydrous Ammonia and LP-Gas | Fuel Gas |
| UL 144-2021 | LP-Gas Regulators (with revisions through August 26, 2021) | Fuel Gas |
| UL 174-2004 | Household Electric Storage Tank Water Heaters (with revisions through Decem- ber 16, 2021) |
Appliances |
| UL 180-2021 | Combustible Liquid Tank Accessories (with revisions through August 25, 2021) |
Gauges, Level Gauges |
| UL 252-2017 | Compressed Gas Regulators (with revisions through August 10, 2018) | Fuel Gas |
| UL 268-2016 | Smoke Detectors for Fire Alarm Systems (with revisions through October 31, 2019) |
Smoke Detectors |
| UL 343-2008 | Pumps for Oil-Burning Appliances (with revisions through December 6, 2021) | 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 (with revisions through March 19, 2021) | Valves |
| UL 443-2006 | Steel Auxiliary Tanks for Oil-Burner Fuel (with revisions through May 31, 2018) |
Fuel Gas |
| UL 521-1999 | Heat Detectors for Fire Protective Signaling Systems (with revisions through November 18, 2020) |
Heat Detectors |
| 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 733-2019 | Oil-Fired Air Heaters and Direct-Fired Heaters | Water Heaters, Direct Fired, Oil Fired |
| UL 842-2020 | Valves for Flammable Fluids and Combustible Liquids (with revisions through October 27, 2017) |
Valves |
| UL 1389-2019 | Plant Oil Extraction Equipment for Installation and Use in Ordinary (Unclas- sified) Locations and Hazardous (Classified) Locations (with revisions through October 13, 2020) |
Plant Oil Extraction |
| 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 |
| UL 2017-2008 | General-Purpose Signaling Devices and Systems (with revisions through December 14, 2018) |
Signaling Devices |
| UL 2075-2013 | Gas and Vapor Detectors and Sensors (with revisions through December 21, 2017) |
Gas Detectors |
| UL 8800-2019 | Horticultural Lighting Equipment and Systems | Electrical |
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REFERENCED STANDARDS
ABBREVIATIONS IN TABLE 1801.1 AND TABLE 1801.2
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.
AHAM Association of Home Appliance Manufacturers, 1111 19th Street, NW, Suite 402, Washington, DC 20036.
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.
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.
ASSP American Society of Safety Professionals, 520 N. Northwest Highway, Park Ridge, IL 60068.
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.
CGSB Canadian General Standards Board, 140 O’Connor Street, L’Esplanade Laurier Building, 6th floor East Tower, Ottawa, Ontario, Canada K1A 0R5.
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.
IEST Institute of Environmental Sciences and Technology, 1827 Walden Office Square, Suite 400, Schaumburg, IL 60173.
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.
NAIMA North American Insulation Manufacturers Association, Inc., 11 Canal Center Plaza #103, Alexandria, VA 22314.
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.
384 2025 CALIFORNIA MECHANICAL CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
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
Appendix I
Appendix J
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
386 2025 CALIFORNIA MECHANICAL CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE
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Ask AI about this code▸ Contents — 2025 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 — GEOTHERMAL ENERGY SYSTEMS AND AMBIENT TEMPERATURE…
- Chapter 18 — 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 — SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION …
- Appendix G — EXAMPLE CALCULATION OF OUTDOOR AIR RATE
- Appendix H — PROFESSIONAL QUALIFICATIONS
- Appendix I — INDOOR HORTICULTURAL FACILITIES
- Appendix J — CLEAN AIR DELIVERY