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NYC Building Code

§ 909.21.1.1 — § 909.21.1.1

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What is NYC BC § 909.21.1.1?

Quick Answer

This section outlines the use of ventilation systems in conjunction with elevator shaft pressurization systems. It specifies that these systems may exhaust air from adjacent spaces to maintain necessary positive pressure relationships during operation. Applies to building owners implementing elevator safety measures.

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

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909.21.1.1 Use of ventilation systems.

BC § 909.21.1.1

Ventilation systems, other than hoistway supply air systems, are permitted to be used to exhaust air from adjacent spaces on the fire floor, two floors immediately below and one floor immediately above the fire floor to the building's exterior where necessary to maintain positive pressure relationships as required in Section 909.21.1 during operation of the elevator shaft pressurization system. Where ventilation systems are being used as a component of the elevator hoistway pressurization system, they shall comply with Section 909.21.

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