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Form a Business

Ductwork.

Municipal Code of Chicago § 18-28-920.4.4
in effect
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18-28-920.4.4 Ductwork. A unit heater shall not be attached to a warm air duct system unless listed and marked for such installation.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2688435Fetched: 10/24/2026

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18-28-920.4.4 | Corpus