A. Habitable Spaces. Every habitable space shall have not less than one (1) openable window. The total openable area of the window in every room shall be equal to not less than 45 percent of the minimum glazed area required in Section 15.10.260(A).

Exception: Where rooms and spaces without openings to the outdoors are ventilated through an adjoining room, the unobstructed opening to the adjoining room shall be not less than eight (8) percent of the floor area of the interior room or space, but not less than twenty-five (25) square feet (2.33 m²). The ventilation openings to the outdoors shall be based on a total floor area being ventilated.

B. Bathrooms and Toilet Rooms. Every bathroom and toilet room shall comply with the ventilation requirements for habitable spaces as required by subsection (A) of this section, except that a window shall not be required in such spaces equipped with a mechanical ventilation system. Air exhausted by a mechanical ventilation system from a bathroom or toilet room shall discharge to the outdoors and shall not be recirculated.

C. Cooking Facilities. Unless approved through the certificate of occupancy, cooking shall not be permitted in any rooming unit or dormitory unit, and a cooking facility or appliance shall not be permitted to be present in the rooming unit or dormitory unit.

Exceptions:

D. Process Ventilation. Where injurious, toxic, irritating or noxious fumes, gases, dusts or mists are generated, a local exhaust ventilation system shall be provided to remove the contaminating agent at the source. Air shall be exhausted to the exterior and not be recirculated to any space.

E. Clothes Dryer Exhaust. Clothes dryer exhaust systems shall be independent of all other systems and shall be exhausted outside the structure in accordance with the manufacturer’s instructions. Exception: Listed and labeled condensing (ductless) clothes dryers.