Duraheat, 220,000 btu, kerosene portable forced air heater with dual heat technology, 180,000 btu on low, 220,000 btu on high, commercial grade, heats up to 5,300 sq ft, includes digital diagnostics & led temperature indicator, flat free cold weather tires, built in thermostat, 13 gallon fuel tank, 650 cfm, run time fuel gauge, on/off switch, 1 touch ignition, built in air pressure gauge, auxiliary power outlet, threaded axle system, 1 touch electronic start, extension cord wrap, dual lift handles & convenient drain plug, includes ul listed large capacity motors & fuse protected electrical system, all components are securely fastened into chassis to insure long life, utilizes heavy duty spark technology for in field endurance, multi-fuel capable, has been factory tested to operate with 1k kerosene, #1 & #2 fuel oil & diesel, jp-8 & jet-a fuels.