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3. Other spaces. All other spaces shall be provided with natural or artificial light sufficient to permit the maintenance of sanitary conditions, and the safe occupancy of the space and utilization of the appliances, equipment and fixtures. �- C. Ventilation 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 45 percent of the minimum glazed area required in Section 906.06.B.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 8 percent of the floor area of the interior room or space, but not less than 25 square feet (2.33 m2). The ventilation openings to the outdoors shall be based on a total floor area being ventilated. 2. Bathrooms and toilet rooms. Every bathroom and toilet room shall comply with the ventilation requirements for habitable spaces as required by Section 906.06.C.1, except that a window shall not be required in such spaces equipped with a mechanical ventilation system. Air e�chausted by a mechanical ventilation system from a bathroom or toilet room shall discharge to the outdoors and shall not be recirculated. 3. 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 a rooming unit or dormitory unit. Exception: Where specifically approved in writing by the code official. 4. 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 re-circulated to any space. 5. Clothes dryer exhaust. Clothes dryer exhaust systems shall be independent of all other systems and shall be exhausted in accordance with the manufacturer's instructions. D. Occupancy Limitations 1. Privacy. Dwelling units, hotel units, housekeeping units, rooming units and dormitory units shall be arranged to provide privacy and be separate from other adjoining spaces. � 2. Minimum room widths. A habitable room, other than a kitchen, shall not be less than 7 feet (2134 mm) in any plan dimension. Kitchens shall have a clear passageway of not less than 3 feet (914 mm) between counterfronts and appliances or counterfronts and walls. 3. Minimum ceiling heights. Habitable spaces, hallways, corridors, laundry areas, bathrooms, toilet rooms and habitable basement areas shall have a clear ceiling height of not less than 7 feet (2134 mm). Exceptions: 1. In one-and two-family dwellings, beams or girders spaced not less than 4 feet (1219 mm) on center and projecting not more than 6 inches (152 mm) below the required ceiling height. 2. Basement rooms in one-and two-family dwellings occupied exclusively for laundry, study or recreation purposes, having a ceiling height of not less than 6 feet 8 inches (2033 mm) with not less than 6 feet 4 inches (1932 mm) of clear height under beams, girders, ducts and similar obstructions. 3. Rooms occupied exclusively for sleeping, study or similar purposes and having a sloped ceiling over all or part of the room, with a clear ceiling height of at least 7 feet (2134 mm) over not less than one-third of the required minimum floor area. In calculating the floor area of such rooms, only those portions of the floor area with a clear ceiling height of 5 feet (1524 mm) or more shall be included. 4. Bedroom requirements. Every bedroom shall comply with the requirements of Sections 906.06.D.4.a. through 906.06.D.4.e. a. Area for sleeping purposes. Every bedroom occupied by one person shall contain at least 70 square feet (6.5 m2) of floor area, and every bedroom occupied by more than one person shall contain at least 50 square feet (4.6 m2)of floor area for each occupant thereof. b. Access from bedrooms. Bedrooms shall not constitute the only means of access to other bedrooms or habitable spaces and shall not serve as the only means of egress from other habitable spaces. Exception: Units that contain fewer than two bedrooms. c. Water closet accessibility. Every bedroom shall have access to at least one water closet and one � lavatory without passing through another bedroom. Every bedroom in a dwelling unit shall have 2009 Seasonal Inspector Handbook Page 79 � �.