N.Y. Multiple Residence Law § 139: Boiler rooms

§ 139. Boiler rooms. In every dwelling the boiler or furnace of a

central heating plant shall be enclosed in a fireproof room or space and

all openings therefrom to other portions of the dwelling shall be

equipped with fireproof doors and assemblies with the doors

self-closing, except that in any dwelling three stories or less in

height, such room or space may in the alternative be enclosed with walls

or partitions constructed of fire-resistive materials and the ceiling

fire retarded.