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Ducts.

Municipal Code of Chicago § 18-28-501.5
in effect
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18-28-501.5 Ducts. Where exhaust duct construction is not specified in this chapter, such construction shall comply with Article 6, Duct System.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2686992Fetched: 10/24/2026

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