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NYC Building Code

§ 910.4.3 — § 910.4.3

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What is NYC BC § 910.4.3?

Quick Answer

This section establishes the design criteria for mechanical smoke removal systems, requiring a minimum exhaust rate of two air changes per hour based on the building's volume without contents. It also limits the capacity of each exhaust fan to a maximum of 30,000 cubic feet per minute. Applies to building owners implementing smoke removal systems.

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

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910.4.3 System design criteria.

BC § 910.4.3

The mechanical smoke removal system shall be sized to exhaust the building at a minimum rate of two air changes per hour based upon the volume of the building or portion thereof without contents. The capacity of each exhaust fan shall not exceed 30,000 cubic feet per minute (14.2 m 3 /sec).

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