For AI agents: read the machine-readable documentation index at /llms.txt or the single-file full reference at /llms-full.txt.
Form a Business

Damper.

Municipal Code of Chicago § 18-28-401.5.1.7
in effect
Sign in to generate a plain English summaryAsk Belisarius Agent
18-28-401.5.1.7 Damper. The duct may be equipped either with a gravity type damper that permits air to flow in one direction only; or with an automatic damper that closes only when the fan serving the room is not running, or both.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2686855Fetched: 10/24/2026

Starting a business in Illinois? Illinois LLC guide: costs and requirements

18-28-401.5.1.7 | Corpus