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§ 18-28-606.2.3 — Return air risers

Municipal Code of Chicago (2026 S-74, current through Council Journal of June 17, 2026) · Municipal Code of Chicago § 18-28-606.2.3

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18-28-606.2.3 Return air risers.

Where return air risers serve two or more stories and are part of a return air system having a design capacity greater than 15,000 cfm (7.1 m 3 /s), smoke detectors shall be installed at each story. Such smoke detectors shall be located upstream of the connection between the return air riser and any air ducts or plenums.