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Flammable refrigerants.

Municipal Code of Chicago § 18-28-1106.9
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18-28-1106.9 Flammable refrigerants. Where refrigerants of Groups A2, A3, B2 and B3 are used, the machinery room shall conform to the Class I, Division 2, hazardous location classification requirements of NFPA 70. Exception: Ammonia machinery rooms.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2688898Fetched: 10/24/2026

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18-28-1106.9 | Corpus