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(a) Enclosures. Heating plants, other than approved direct-fired unit heaters, shall be separated from all garage space by walls providing fire resistance of not less than four hours and by floors and ceilings providing fire resistance of not less than two hours. Openings in walls except as required for pipes and ducts shall be limited to one means of access which shall be through a vestibule protected on each side with a self- closing Class A fire door.
(b) Equipment. Except as provided in paragraphs (c) and (d), garage heating shall be by means of radiation or convection from hot water, vapor, or steam heating systems of which the boilers or devices containing combustion chambers and the fuel storage spaces shall be separated from every garage space as required in paragraph (a).
(c) Gas or oil unit heaters. Gas fired or oil fired unit heaters, subject to the following provisions, shall be permitted in garages:
(1) The flames shall be protected from draughts of air and contact with combustible materials.
(2) Unit heaters shall be so installed that the bottom of the heater shall not be less than eight feet above the floor. They shall be constructed and arranged to conform to the requirements of the “Standard for Garages, N.F.P.A. Pamphlet No. 88, July 1957”.
(3) Direct-fired unit heaters specifically approved for use in garages in the “Gas and Oil Equipment List, Underwriters – Laboratories, Inc., November, 1958" shall be considered acceptable under the provisions of this section.
(4) Infra-red gas fired self-contained heaters complying with the provisions of Chapter 18-28 of this Code and specifically approved for use in garages in accordance with Standards as published in Underwriters Laboratories, Inc. “Gas and Oil Equipment List”, current edition, and in American Gas Association's “Directory of Certified Appliances and Accessories”, current edition. All minimum clearances shall be maintained as recommended in these Standards.
(d) Electric Unit Heaters. Electric unit heaters constructed and installed to conform to the Underwriters' Laboratories, Inc., “Standards for Safety – Electric Heating Appliances UL 499, Sixth Edition, August, 1956" shall be permitted in garages.
(Prior code § 59-3.5; Amend Coun. J. 11-9-16, p. 36266, § 23)