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502.6.2 Type IV and V systems.
Type IV and V dry cleaning systems shall be provided with an automatically activated exhaust ventilation system to maintain an air velocity of not less than 100 feet per minute (0.51 m/s) through the loading door when the door is opened.
Exception: Dry cleaning units are not required to be provided with exhaust ventilation where an exhaust hood is installed immediately outside of and above the loading door which operates at an airflow rate as follows:
Q = 100 × ALD | (Equation 5-1) |
where:
Q | = | Flow rate exhausted through the hood, cubic feet per minute. |
ALD | = | Area of the loading door, square feet. |
502.6.3 Spotting and pretreating.
Scrubbing tubs, scouring, brushing or spotting operations shall be located such that solvent vapors are captured and exhausted by the ventilating system.
502.7 Application of flammable finishes.
Mechanical exhaust as required by this section shall be provided for operations involving the application of flammable finishes and shall comply with the New York City Fire Code.
502.7.1 During construction.
Ventilation shall be provided for operations involving the application of materials containing flammable solvents in the course of construction, alteration or demolition of a structure.
502.7.2 Limited spraying spaces.
Positive mechanical ventilation that provides not less than six complete air changes per hour shall be installed in limited spraying spaces. Such system shall meet the requirements of the New York City Fire Code for handling flammable vapors. Explosion venting is not required.
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