"Cut your petroleum dependency back and stay warm by burning used crankcase, hydraulic and transmission oil. This super-powered heater produces a ton of heat to warm a very large space. U.S.A. Not for sale in California. Heating Capability sq. ft. 10,000, Thermostat Included Yes, Dimensions L x W x H in. 54 x 46 x 36, Fuel Type Waste oil, Amps 20, Volts 120, BTU Output 300,000, Chimney Type Class A RV cover, Chimney Pipe Size in. 8, Fuel Consumption gal./hr. 2.08, Blower CFM 1,696. Burns Used W10-W50 crankcase oil 2.08 GPH fuel input"