(a) All living quarters and service rooms shall be provided with properly installed, operable heating equipment capable of maintaining a temperature of at least 68 [deg]F. if during the period of normal occupancy the temperature in such quarters falls below 68[deg].
(b) Any stoves or other sources of heat utilizing combustible fuel shall be installed and vented in such a manner as to prevent fire hazards and a dangerous concentration of gases. No portable heaters other than those operated by electricity shall be provided. If a solid or liquid fuel stove is used in a room with wooden or other combustible flooring, there shall be a concrete slab, insulated metal sheet, or other fireproof material on the floor under each stove, extending at least 18 inches beyond the perimeter of the base of the stove.
(c) Any wall or ceiling within 18 inches of a solid or liquid fuel stove or a stovepipe shall be of fireproof material. A vented metal collar shall be installed around a stovepipe, or vent passing through a wall, ceiling, floor or roof.
(d) When a heating system has automatic controls, the controls shall be of the type which cut off the fuel supply upon the failure or interruption of the flame or ignition, or whenever a predetermined safe temperature or pressure is exceeded. [45 FR 14182, Mar. 4, 1980; 45 FR 22901, Apr. 4, 1980]