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Forced draft systems.

Municipal Code of Chicago § 18-28-804.3.1
in effect
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18-28-804.3.1 Forced draft systems. Forced draft systems and all portions of induced draft systems under positive pressure during operation shall be designed and installed so as to be gas tight to prevent leakage of combustion products into a building.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2687909Fetched: 10/24/2026

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18-28-804.3.1 | Corpus