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Joints and refrigerant-containing parts in air ducts.

Municipal Code of Chicago § 18-28-1107.5
in effect
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18-28-1107.5 Joints and refrigerant-containing parts in air ducts. All connections located within a ventilation system shall be formed by fusion welding or socket type brazed fittings. No valves, devices or connections thereto shall be located in a ventilation system, except systems containing less than 100 pounds (45.36 kg) of refrigerant and do not contain a warm air furnace or electric resistance heating coil.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2688946Fetched: 10/24/2026

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18-28-1107.5 | Corpus