NYC Admin. Code § 27-817 Location.
§ 27-817 Location.
Floor furnaces shall be located so as to be accessible and shall not be installed in the floor of any corridor or passageway, nor in any exit in a place of assembly.
Floor Furnaces
NYC Admin. Code tit. 27, ch. 1, subch. 14, art. 13
in effectNYC Admin. Code § 27-818 Enclosures.
§ 27-818 Enclosures.
Enclosures of floor furnaces shall be constructed entirely of noncombustible materials with a fire resistance rating of at least one hour and the enclosure shall be provided with adequate outdoor air in accordance with the requirements of article nine of this subchapter to ensure proper combustion. The enclosure shall be provided with adequate means of access for servicing the furnace.
NYC Admin. Code § 27-819 Furnace supports.
§ 27-819 Furnace supports.
Floor furnaces shall be installed only in floors of noncombustible construction having at least a two hour fire resistance rating, except as provided for one- and two-family dwellings in section 27-823 of this article. Floor furnaces shall have the following clearances:
(a) Pit clearances. Floor furnaces, when other than gas-fired, shall be mounted independently of the floor grille with a six inch clearance at the bottom and a twelve inch clearance at the sides except that the clearance on the control side shall be at least eighteen inches.
(b) Pit waterproofing. When there is likelihood of water rising above the bottom clearance of the unit, the pit shall be constructed with a watertight enclosure with the sides extending at least four inches above the ground level.
NYC Admin. Code § 27-820 Pit access openings.
§ 27-820 Pit access openings.
The access foundation wall opening or floor trap door shall be at least eighteen inches by twenty-four inches and the under floor passage to the furnace shall be at least twenty-four inches by twenty-four inches in cross-section.
NYC Admin. Code § 27-821 Duct temperature.
§ 27-821 Duct temperature.
The outlet duct temperature of warm air heating furnaces shall not be greater than two hundred fifty degrees Fahrenheit.
NYC Admin. Code § 27-822 Pressure regulator.
§ 27-822 Pressure regulator.
In gas-fired furnaces, a gas pressure regulator shall be provided so that the gas input does not exceed the manufacturer's rating. Pressure regulators shall comply with the requirements of article five of this subchapter.
NYC Admin. Code § 27-823 One- and two-family dwellings.
§ 27-823 One- and two-family dwellings.
Floor furnace enclosures shall be constructed of noncombustible materials with a fire resistance rating of at least one hour. Means shall be provided for supporting the furnace when the floor grille is removed. Clearances shall be as provided in reference standards RS 14-15 and 14-16.
Source: City of New York, Charter, Administrative Code and Rules (American Legal Publishing XML export, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYCadmin/0-0-0-52174Fetched: 10/24/2026