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In all rooms or halls in which dancing is permitted, ventilation shall be provided as required in Chapter 18-28; except that existing dance halls, in which the floor area is less than 2,000 square feet, may be ventilated by means of a mechanical ventilating exhaust system described in Section 18-28-401.1. The capacity of such system shall be equal to three cubic feet of air per minute for each square foot of floor area of any such dance hall and the ventilating openings in such room or space shall be not less than four percent of the floor area.
(Added Coun. J. 12-9-92, p. 25465; Amend Coun. J. 7-2-97, p. 48017; Amend Coun. J. 11-19-14, p. 98037, § 6)