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NYC Building Code

§ 1203.5.1.4.1 — § 1203.5.1.4.1

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What is NYC BC § 1203.5.1.4.1?

Quick Answer

This section establishes the minimum openable area for natural ventilation in buildings, requiring it to be 5 percent of the floor area. Windows or openings must meet specific size requirements to ensure adequate ventilation. Applies to building owners responsible for maintaining ventilation standards.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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1203.5.1.4.1 Minimum opening.

BC § 1203.5.1.4.1

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 m 2 ) in total area, providing a minimum of 1 1/2 square feet (0.14 m 2 ) of openable area. Exception: Skylights shall comply with the exception of Section 1203.5.1.4.

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