Ch. 11 Refrigeration — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-10-19 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Mechanical Code (Title 24, Part 4) Chapter 11 · Effective January 1, 2026 · Official source: Building Standards Commission
(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 1 | HCD 2 | HCD 1-AC | DSA AC | DSA SS | DSA SS/CC | OSHPD 1 | OSHPD 1R | OSHPD 2 | OSHPD 3 | OSHPD 4 | OSHPD 5 | OSHPD 6 | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adopt Entire Chapter | X | X | X | X | X | X | X | X | X | X | ||||||||||||||
| Adopt Entire Chapter as amended (amended sections listed below) | X | X | X | |||||||||||||||||||||
| Adopt only those sections that are listed below | ||||||||||||||||||||||||
| Chapter/ |
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| 1104.3 Exception | X | X | ||||||||||||||||||||||
| 1108.4 | 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.
CHAPTER 11
REFRIGERATION
1101.0 General.¶
1102.0 Refrigeration Systems.¶
1103.0 Classification.¶
1104.0 Requirements for Refrigerant and Refrigeration System Use.¶
1104.0 Requirements for Refrigerant and Refrigera- tion System Use.
1105.0 General Requirements.¶
1106.0 Refrigeration Machinery Rooms.¶
1107.0 Machinery Room, Special Requirements.¶
1108.0 Refrigeration Machinery Room Equipment and Controls.¶
and Controls.
1109.0 Refrigeration Piping, Containers, and Valves.¶
1110.0 Valves.¶
1111.0 Pressure-Limiting Devices.¶
1112.0 Pressure-Relief Devices.¶
1113.0 Overpressure Protection.¶
1114.0 Special Discharge Requirements.¶
1115.0 Labeling and Identification.¶
1116.0 Testing of Refrigeration Equipment.¶
1117.0 Refrigerant-Containing Pressure Vessels.¶
1118.0 Maintenance and Operation.¶
1119.0 General.¶
1120.0 Support and Anchorage.¶
1121.0 Drainage.¶
1122.0 Chemical Treatment Systems.¶
1123.0 Location.¶
1124.0 Electrical.¶
1125.0 Refrigerants and Hazardous Fluids.¶
1126.0 Drift Eliminators.¶
1127.0 Water Supply.¶
Explained in plain English
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- What overpressure protection is required for boilers and pressure vessels?
- What testing, periodic inspection and recordkeeping are required for refrigeration systems?
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- What identification, labeling and nameplate requirements apply for systems using flammable refrigerants?
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