Dura heat, 180,000 btu, kerosene portable forced air heater with dual heat technology, 140,000 btu on low, 180,000 btu on high, commercial grade, heats up to 4,300 sqft, includes digital diagnostics & led temperature indicator, flat free cold weather tires, threaded axle system, built in thermostat, 13 gallon fuel tank, 600 cfm, run time fuel gauge, auxiliary power outlet, 1 touch electric start, on/off switch, built in pressure gauge, 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.