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Relief openings.

Municipal Code of Chicago § 18-28-926.7
in effect
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18-28-926.7 Relief openings. The design of the installation shall include adequate provisions to permit the non-recirculating direct gas- fired industrial air heater to operate at its rated airflow without over-pressurizing the space served by the heater by taking into account the structure's designed infiltration rate, properly designed relief openings, an interlocked powered exhaust system, or a combination of these methods.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2688501Fetched: 10/24/2026

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18-28-926.7 | Corpus