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. U.S.A. Item is on backorder until November 9th. Heating Application: Construction, Garage, BTU Output: 45,000, Vent-Free: No, Heating Capability (sq. ft.): 700, Blower Included: No, Blower Power Supply (Volts, Amps): 120, Fuel Type: Propane, Igniter: Electronic, Thermostat Included: No, Remote Included: No, Oxygen Depletion Sensor: No, Dimensions L x W x H (in.): 14.5 x 10.75 x 15.5 Propane 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# 173640) Thermostat sold separately Item# 173649 10-ft. overall length Shipped in 2 cartons