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Sec. 8-15.506. Ventilation.
   (a)   A ventilation system shall be provided that will provide at least the minimum air circulation and fresh air supply requirements of this Code in each habitable room without opening any window, door or other opening to the exterior. All concealed ductwork shall be insulated flexible glass fiber ducting that is at least ten (10) feet long between any two points of connection. Exposed ductwork may be sheet metal with one (1) inch fiberglass duct liner and shall have a bend in the duct to avoid direct line-of-sight through the duct.
   (b)   Kitchen cooktop vent hoods shall be replaced with nonducted recirculating vent hoods with no ducted connection to the exterior.
(§ 2, Ord. 2616, eff. June 20, 1996)