"This HeatStar High-Intensity Infrared Natural Gas Heater provides quiet, clean heat for pole barns, factories, warehouses, loading docks and more. U.S.A. Fuel Consumption gal./hr. 4.62, Blower Included No, Igniter Yes, Fuel Type Natural gas, Thermostat Included No, Vent-Free No, Oxygen Depletion Sensor No, Heating Capability sq. ft. 1,200, BTU Output 100,000, Gas Inlet in. 1/2 FPT, Product Type Radiant heat, Remote Included No, Dimensions L x W x H in. 60 1/2 x 21 1/2 x 11. 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"