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502.10.2 Penetrations.
Exhaust ducts penetrating fire barrier assemblies constructed in accordance with Section 707 of the New York City Building Code or horizontal assemblies constructed in accordance with Section 711 of the New York City Building Code shall be contained in a shaft of equivalent fire-resistance-rated construction. Exhaust ducts shall not penetrate fire walls. Fire dampers shall not be installed in exhaust ducts.
502.10.3 Treatment systems.
Treatment systems for highly toxic and toxic gases shall comply with the New York City Fire Code.
502.11 Motion picture projectors.
Motion picture projectors shall be exhausted in accordance with Section 502.11.1 or 502.11.2.
502.11.1 Projectors with an exhaust discharge.
Projectors equipped with an exhaust discharge shall be directly connected to a mechanical exhaust system. The exhaust system shall operate at an exhaust rate as indicated by the manufacturer's instructions.
502.11.2 Projectors without exhaust connection.
Projectors without an exhaust connection shall have contaminants exhausted through a mechanical exhaust system. The exhaust rate for electric arc projectors shall be not less than 200 cubic feet per minute (cfm) (0.09 m
3
/s) per lamp. The exhaust rate for xenon projectors shall be not less than 300 cfm (0.14 m
3
/s) per lamp. Xenon projector exhaust shall be at a rate such that the exterior temperature of the lamp housing does not exceed 130°F (54.4°C). The lamp and projection room exhaust systems, whether combined or independent, shall not be interconnected with any other exhaust or return system within the building.
502.12 Organic coating processes.
Enclosed structures involving organic coating processes in which Class I liquids are processed or handled shall be ventilated at a rate of not less than 1 cfm/ft
2
(0.00508 m
3
/(s • m
2
)) of solid floor area. Ventilation shall be accomplished by exhaust fans that intake at floor levels and discharge to a safe location outside the structure. Noncontaminated intake air shall be introduced in such a manner that all portions of solid floor areas are provided with continuous uniformly distributed air movement.
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