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What is NYC MC § 504.6?

Quick Answer

This section mandates that installations exhausting more than 200 cubic feet per minute (cfm) must have makeup air. For closets designed for clothes dryers, an opening of at least 100 square inches is required, or alternative approved means for makeup air must be provided. Applies to building owners managing ventilation systems.

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

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504.6 Makeup air.

MC § 504.6

Installations exhausting more than 200 cfm (0.09 m 3 /s) shall be provided with makeup air. Where a closet is designed for the installation of a clothes dryer, an opening having an area of not less than 100 square inches (0.0645 m 2 ) shall be provided in the closet enclosure or makeup air shall be provided by other approved means.

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