502.9.1 Compressed gases – medical gas systems.
MC § 502.9.1
Rooms for the storage of compressed medical gases where the amounts being stored require a permit in accordance with the New York City Fire Code, and that do not have an exterior wall, shall be exhausted through a duct to the exterior of the building. Each space shall be separately exhausted, and each exhaust air stream shall be enclosed in a 1-hour-rated shaft enclosure from the room to the exterior. Approved mechanical ventilation shall be provided at a minimum rate of 1 cfm/ft 2 (0.00508 m 3 /(s • m 2 )) of the area of the room. Gas cabinets for the storage of compressed medical gases where the amounts being stored require a permit in accordance with the New York City Fire Code shall be connected to an exhaust system. The average velocity of ventilation at the face of access ports or windows shall be not less than 200 feet per minute (1.02 m/s) with a minimum velocity of 150 feet per minute (0.76 m/s) at any point at the access port or window.
