1106.1 Where Required — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-25 · 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) § 1106.1 · Effective January 1, 2026 · Official source: Building Standards Commission
Refrigeration systems shall be provided with a refrigeration machinery room where the conditions as outlined in Section 1106.1.1 through Section 1106.1.4 exist.
Exception: Refrigeration equipment shall be permitted to be located outdoors in accordance with ASHRAE 15.
1106.1.1 Quantity. The quantity of refrigerant in a single, independent refrigerant circuit of a system exceeds the amounts of Table 1102.3.
1106.1.2 Equipment. Direct- and indirect-fired absorption equipment is used.
Exception: Direct and indirect-fired lithium bromide absorption systems using water as the refrigerant.
1106.1.3 A1 System. An A1 system having an aggregate combined compressor horsepower of 100 (74.6 kW) or more is used.
1106.1.4 A1 Refrigerant. The system contains other than a Group A1 refrigerant.
Exceptions:
(1) Lithium bromide absorption systems using water as the refrigerant.
(2) Systems containing less than 300 pounds (136.1 kg) of refrigerant R-123 and located in an approved exterior location.
Refrigeration machinery rooms shall house refrigerant-containing portions of the system other than the piping and evaporators permitted by Section 1104.4, discharge piping required of this chapter, and cooling towers regulated by Part II of this chapter, and their essential piping.
Get a plain-English answer with a citation back to this text.
Ask AI about this code