Section R. 400.18309 - HeatingRule 309.
(1) Except as provided in this rule, occupancies shall be heated by an approved heating plant. If the heating plant is located in the basement of a group home, standard building material shall suffice for the separation, which shall include at least a 1 3/4-inch solid wood core door or equivalent to create a floor separation between the basement and the first floor. If the heating plant is on the same level with the residents, the furnace room shall be separated from the remainder of the building with materials that will afford a minimum 1-hour protection enclosure. A permanent outside vent that cannot be closed shall be incorporated in the design of heating plant rooms so that adequate air for proper combustion is assured. Space heaters are prohibited.(2) Factory mutual and underwriters laboratories-approved, permanent, fixed-type electrical heating, such as recognized panel or baseboard fixed-type heating, may be utilized in any location. Where an American gas association (AGA)-approved sealed combustion wall heater has been installed in accordance with both the AGA and the manufacturer's recommendations, approval will be given if the unit is located on an outside wall, obtains combustion air directly from the outside, and vents products of combustion directly to the outside.(3) Flame-producing water heaters or incinerators shall be installed with the same protection as a heating plant.(4) The storage of combustible materials is prohibited in rooms containing the heating plant, water heater, or incinerator.Mich. Admin. Code R. 400.18309