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Institutional occupancies.

Municipal Code of Chicago § 18-28-1104.2.1
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18-28-1104.2.1 Institutional occupancies. High probability systems shall not be allowed in areas of institutional occupancy. Exception: High probability systems shall be allowed in areas of institutional occupancy where the amount of refrigerant in the largest refrigerant circuit does not exceed the lesser of: 1. 50 percent of the pounds of refrigerant allowed in Table 18-28-1103.1, or 2. 30 pounds. The value of cubic feet used to calculate the maximum amount of refrigerant allowed by Table 18-28-1103.1 shall be based on the smallest contiguous space where refrigerant can collect in the vent of a discharge. The total of all Group A2, B2, A3 and B3 refrigerants shall not exceed 550 pounds (250 kg) in occupied areas or 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/0-0-0-2688784Fetched: 10/24/2026

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18-28-1104.2.1 | Corpus