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Kitchenettes in Group R or I-1 occupancies shall be provided with natural ventilation in accordance with Section 1203.5.1.4, unless provided with ventilation in accordance with the New York City Mechanical Code. Openings providing required natural ventilation shall be windows.
Exception: Openable skylights may be substituted for windows provided that:
  1. The kitchenette is on the top story;
  2. The skylight is 12 inches (304.8 mm) in its least dimensions;
  3. The skylight is at least 4 square feet (0.37 m2) or one-eighth of the area of the kitchenette, whichever is greater; and
  4. The skylight provides ventilating openings for at least one-half of its area.
1203.5.1.4.1 Minimum Opening
The minimum openable area to the outdoors shall be 5 percent of the floor area of the space being ventilated. Every window or other opening providing required natural ventilation shall be at least 1 foot (304.8 mm) wide and at least 3 square feet (0.28 m2) in total area, providing a minimum of 11/2 square feet (0.14 m2) of openable area.
Exception: Skylights shall comply with the exception of Section 1203.5.1.4.
1203.5.1.4.2 Adjoining Spaces
Natural ventilation for kitchenettes shall not be through openings off another room or space.
Exception: A kitchenette may open onto a partially enclosed balcony or space above a setback conforming with Exception 2 of Section 1203.5.1.2.2.
1203.5.1.4.3 Basements and Cellars
Where openings provide natural ventilation to kitchenettes less than 80 square feet (7.4 m2) located in basements or cellars, such opening shall also comply with the applicable provisions of Sections 27-2081 through 27-2087 of the New York City Housing Maintenance Code and Sections 26(8) and 34 of the New York State Multiple Dwelling Law.

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