18-28-918.9.2.
   Central heating furnace installations in bedrooms or bathrooms shall comply with one of the following:
   1.   Central heating furnaces shall be installed in a closet located in the bedroom or bathroom, the closet shall have a weather-stripped solid door with a self-closing device, and all combustion air shall be obtained from the outdoors.
   2.   Central heating furnaces shall be of the direct vent type.