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Exhaust hoods capable of exhausting in excess of 400 cfm (0.19 m 3 /s) shall be provided with mechanical makeup air at a rate approximately equal to the exhaust air rate. Such makeup air systems shall be equipped with a means of closure and shall be automatically controlled to start and operate simultaneously with the exhaust system.
(Amend Coun. J. 9-14-21, p. 35949, Art. V, § 12)