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§ 304.7.3 — § 304.7.3

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What is NYC FGC § 304.7.3?

Quick Answer

This section outlines the requirements for calculating the size of outdoor openings in relation to interior spaces. It specifies the method for determining the minimum size of outdoor openings based on the volume of communicating spaces and includes a minimum dimension for air openings. Applies to building owners responsible for ventilation compliance.

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

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304.7.3 Outdoor opening(s) size.

FGC § 304.7.3

The outdoor opening(s) size shall be calculated in accordance with the following: 1. The ratio of interior spaces shall be the available volume of all communicating spaces divided by the required volume.

2.The outdoor size reduction factor shall be one minus the ratio of interior spaces.

3.The minimum size of outdoor opening(s) shall be the full size of outdoor opening(s) calculated in accordance with Section 304.6, multiplied by the reduction factor. The minimum dimension of air openings shall be not less than 3 inches (76.2 mm).

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