"This HeatStar High-Intensity Infrared Natural Gas Heater provides quiet, clean heat for pole barns, factories, warehouses, loading docks and more. U.S.A. Blower Included No, BTU Output 100,000, Gas Inlet in. 1/2 FPT, Heating Capability sq. ft. 1,200, Igniter Yes, Fuel Consumption gal./hr. 4.62, Fuel Type Natural gas, Remote Included No, Thermostat Included No, Oxygen Depletion Sensor No, Dimensions L x W x H in. 60 1/2 x 21 1/2 x 11, Product Type Radiant heat, Vent-Free No. No direct venting required Additional burner orfices enables the installer to increase or decrease the heat output Spark ignition heaters ship with 40VA transformer Millivolt control heaters shipped with thermostat Noncorrosive materials are used throughout heater construction"