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

Minimum size of chimney or vent.

Municipal Code of Chicago § 18-28-801.6
in effect
Sign in to generate a plain English summaryAsk Belisarius Agent
18-28-801.6 Minimum size of chimney or vent. Except as otherwise provided for in this article, the size of the chimney or vent serving a single appliance, except for approved engineered systems, shall have a minimum free area equal to the area of the appliance connection.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2687775Fetched: 10/24/2026

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

18-28-801.6 | Corpus