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, where artificial
light may be provided in accordance with the provisions of the Building
Code. Whenever walls or other portions of 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.
Every laundry, furnace room, and all similar nonhabitable work
spaces located in a building or structure shall have one supplied
electric light fixture available at all times.
Every common hall and inside stairway in every building, other
than a one-family dwelling, shall be adequately lighted at all times
with an illumination of at least five lumens per square foot in the
darkest portion of the normally traveled stairs and passageways.
Every room shall have at least one window which can be easily opened or such other device as will adequately ventilate the room. The total openable window area in every room shall be equal to at least 45% of the minimum window area size required in § 194-6.1, except that no openable window shall be required in bathrooms or water closet compartments equipped with an approved ventilation system.
