Skip to code content (skip section selection)
PM-403.1 Habitable spaces. Every habitable space shall have at least one openable window. The total openable area of the window in every room shall be equal to at least forty-five percent (45%) of the minimum glazed area required in Section PM-402.1.
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 at least eight percent (8%) of the floor area of the interior room or space, but not less than 25 square feet (2.33 m 2). The ventilation openings to the outdoors shall be based on a total floor area being ventilated.
PM-403.2 Bathrooms and toilet rooms. Every bathroom and toilet room shall comply with the ventilation requirements for habitable spaces as required by Section PM-403.1, 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.
1. Where specifically approved in writing by the code official.
2. Devices such as coffee pots and microwave ovens shall not be considered cooking appliances.
Exception: Listed and labeled condensing (ductless) clothes dryers.