Low intensity infrared radiant heat is the most effective and efficient way to add comfort for 2- and 3-car garages, workshops, decks, patios, entryways, greenhouses, farm buildings, ski lodges, bus shelters and more. 3in. aluminized steel U-tube design provides uniform heat distribution. BTU Output 45,000, Dimensions L x W x H in. 128 1/4 x 20 x 12 1/2, Fuel Type Natural gas, Blower Included No, Blower Power Supply Volts, Amps 120, Product Type Radiant heat, Oxygen Depletion Sensor No, Vent-Free No, Remote Included No, Thermostat Included No. Radiant tube heater 3in. aluminized steel U-tube design Polished aluminum deep-dish reflector Commercial and residential approved CSA certified for indoor and outdoor applications Installs easily allowing for horizontal or angle mounting and vertical or horizontal venting vent kit sold separately Item# 28794 Thermostat sold separately Item# 173641 Shipped in 2 cartons.