9-3
GAS-BURNING APPLIANCES:

Each gas-burning appliance shall be approved by a nationally recognized testing agency. Each gas-burning appliance, except ranges, refrigerators and hot plates approved by such agencies for unvented use, shall be approved for vented use and shall be connected to an effective flue or vent leading to the outside, not smaller in size than the vent collar on the appliance. Appliances with forced air draft or sealed combustion chambers shall be vented in accordance with the manufacturer’s directions. The installation of gas heaters or the alteration of existing gas heaters shall be done under a permit obtained from the Building Official. (Code 1972 §14-4)