N.Y.C. Admin. Code § 27-766: § 27-766 Ventilation of rooms or spaces with excessive temperatures, strong odors, toxic substances, or airborne irritants.

In these rooms or spaces, prevention of all of the following conditions shall be considered in the design and installation of a ventilating system:

(a) Excessive temperatures that may be detrimental to the occupants.

(b) The danger of large concentrations of toxic substances in the air.

(c) The danger of large concentrations of airborne irritants an impurities, such as steam, gases, vapor, and dust, that may be injurious to health. Where the exhausted air may contain toxic substances or strong objectional odors, the exhaust system shall be independent of exhaust systems serving other parts of the building.