No person shall occupy as owner-occupant or permit to be occupied by another any dwelling unit that does not comply with the following requirements:
A. 
Window Area. Every habitable room shall have at least one window or skylight facing directly to the outdoors. The minimum total window area available for unobstructed light for every habitable room shall be no less than ten (10) percent of the floor space of such room.
Whenever walls or portions of structures face a window of any such room and such light-obstruction structures 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 and shall not be included as contributing to the required minimum total window area.
B. 
Openable Window Area. Every habitable room shall have at least one window or skylight which can easily be opened, or shall have such other device as will adequately ventilate the room. The total openable window area in every habitable room shall be equal to at least fifty (50) percent of the minimum aggregate glass area required in the preceding subsection except where there is supplied some other approved device affording adequate ventilation.
C. 
Bathroom Light and Ventilation. Every bathroom and toilet room shall comply with the light and ventilation requirements for habitable rooms except that in no case shall the minimum glass area of such window or skylight be less than three square feet; provided, that no window or skylight shall be required in any bathroom or toilet room equipped with a ventilation system which is kept in workable condition and approved by the enforcement officer.
D. 
Screening of Vents. During a portion of the year when there is a need for protection against mosquitoes, flies, and other flying insects, every door excepting bulkheads, opening directly from a dwelling unit to outdoor space shall have screens and a self-closing device; except that screens shall not be required at door openings when an approved summer air conditioning system provides ventilation.
Every window or other device with openings to outdoor space, used or intended to be used for ventilation, shall be supplied with screens.
E. 
Basement Ventilation. Every cellar and basement shall have at least two vents or windows opening directly to the outside air sufficient to prevent mildew or structural deterioration and properly equipped with approved screening.
F. 
Electrical Fixtures. Where there is usable electric service available from power lines, which are not more than three hundred (300) feet away from a dwelling, every dwelling unit, and all public and common areas, shall be supplied with electric service, outlet and fixtures which shall be properly installed, shall be maintained in good and safe working condition, and shall be connected to the source of electric power in a manner prescribed by the ordinances, rules and regulations of the corporate unit. The minimum capacity of such services and the minimum number of outlets and fixtures, shall be as follows: Every habitable room shall contain at least two separate valid-type electric convenience outlets and one supplied ceiling-type electric light fixture, and every toilet room or compartment, bathroom, laundry room, furnace room, stairway and communicating corridor shall be supplied at least with one electric light fixture. Every such outlet and fixture shall be properly installed, shall be maintained in good and safe working condition, and shall be connected to the source of electric power in a safe manner.
G. 
Lighting of Public Spaces. Every common shall and common stairway used primarily for egress or ingress in connection with two or more dwelling units shall be supplied with a proper amount of natural or electric light at all times; provided that such common halls and common stairways in structures containing not more than three dwelling units shall be deemed to have fulfilled such requirement if they are properly supplied with conveniently located switches in the common halls and common stairways, controlling an adequate electric lighting system which may be turned on when needed and provided that all common stairways not used primarily for egress or ingress in all such dwellings shall be properly supplied with such switches. Every such outlet and fixture shall be properly installed, shall be maintained in good and safe working condition and shall be connected to the source of electric power in a safe manner.
(Prior code § 14-68)