A. Requirements for a Heating System . If a dwelling unit contains a heating system or heating appliances that meet the requirements of this Section, the owner(s) of the dwelling unit shall not be required to install a new heating system or heating appliances, where the existing heating system or heating appliances are maintained in good and safe working condition. Where an existing heating system or heating appliances do not meet the requirements of this Section, a heating system or heating appliances shall be installed and maintained in compliance with this Section.
f. Minimum Standards for Ventilation
(1) General. Every habitable room shall have at least one (1) window or skylight facing directly to the outdoors. The minimum total window area, measured between stops, for every habitable room shall be 10 percent (10%) of the floor area of such room. Whenever walls or other portions of structures face a window of any such room and such light obstructions are located less than five (5) 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. Whenever the only window in a room is a skylight type window in the top of such room the total window area of such skylight shall equal at least 15 percent (15%) of the total floor area of such room. (2) Habitable Rooms. Every habitable room shall have at least one (1) window or skylight which can easily be opened, or such other device as will adequately ventilate the room. The total openable window area in every habitable room, shall be equal to at least 45 percent (45%) of the minimum window area size or minimum skylight type window size as required, or shall have other approved, equivalent ventilation. (3) Bathroom & Water Closet Room. Every bathroom and water closet compartment shall comply with the light and ventilation requirements for habitable rooms except that no window or skylight shall be required in adequately ventilated bathrooms and water closet rooms equipped with an approved ventilation system.
(4) Air Circulation . Adequate air circulation shall be allowed in spaces below first floor joists and between the roof and ceilings as required by the North Carolina State Residential Code.
g. Minimum Standards for Space, Use & Location
(1) Room Sizes. Every dwelling unit shall contain at least the minimum room size in each habitable room as required by the Town Residential Building Code. Every dwelling unit shall contain at least 150 square feet of habitable floor area for the first occupant; at least
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