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Velocity.

Municipal Code of Chicago § 18-29-713.7.2
in effect
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18-29-713.7.2 Velocity. The velocity of airflow in a central vacuum (fluid suction) system shall be less than 5,000 feet per minute (25.4 m/s).
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2692269Fetched: 10/24/2026

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18-29-713.7.2 | Corpus