§ 151.043  LIGHT AND VENTILATION.
   No person shall occupy as owner/occupant, or let to another for occupancy, any dwelling, multi- family dwelling, dwelling unit, rooming house or rooming unit for the purpose of living therein which does not comply with the following requirements.
   (A)   (1)   Natural light in habitable rooms. Every habitable room shall have at least one window of approved size facing directly to the outdoors or to a court.  The minimum total window area, measured between stops, for every habitable room shall be 10% of the floor area of such room, except in kitchens, when artificial light may be provided in accordance with the provisions of the Basic Building Code.  Whenever walls or other portions of such a structure face a window of any room and such obstructions are located less than three feet from the window and extend to a level above that of the ceiling of the room, such a window shall not be deemed to face directly to the outdoors nor to a court and shall not be included as contributing to the required minimum total window area for the room.
      (2)   Light in a non-habitable work space.  Every laundry, furnace room, and all similar non- habitable work spaces located in a dwelling or multi-family dwelling shall have one supplied electric light fixture available at all times.
      (3)   Light in public halls and stairways.  Every public hall and inside stairway in every dwelling or multi-family dwelling shall be adequately lighted at all times with an illumination of at least five lumens per square feet in the darkest portion of the normally traveled stairs and passageways.
   (B)   Electric outlets required.  Where there is electric service available to the building or structure, every habitable room of a dwelling or multi-family dwelling shall contain at least two separate and remote outlets, one of which may be a ceiling or wall-type electric light fixture.  In kitchens, three separate and remote wall-type electric convenience outlets or two such convenience outlets and one ceiling or wall-type electric light fixture shall be provided.  Every public hall, water closet compartment, bathroom, laundry room or furnace room shall contain at least one electric light fixture. In addition to the electric light fixture in every bathroom and laundry room, there shall be provided at least one electric outlet.
   (C)   (1)   Adequate ventilation.  Every habitable room shall have at least one window which can be easily opened or such other device as to adequately ventilate the room.  The total openable window area in every habitable room shall be equal to at least 45% of the minimum window area size required in division (A)(1) of this section, except where mechanical ventilation is provided in accordance with the provisions of the Basic Building Code.
      (2)   Ventilation and light in bathroom and water closet.  Every bathroom and water closet compartment shall comply with the light and ventilation requirements for habitable rooms as required by divisions (A)(1) and (B) of this section, except that no window shall be required in bathrooms or water closet compartments equipped with an approved ventilation system.
(Ord. 151, passed 4-21-69)  Penalty, see § 151.999