The Dyna-Glo Delux 400,000 BTU portable multi-fuel forced air heaters provide immediate relief from cold weather working conditions. Ideal for residential, industrial and commercial applications, multi-fuel heaters require little to no assembly and are 98% fuel efficient. The operate on 1 K kerosene, # 1 diesel, and # 1 fuel oil. Heating coverage area is up to 8,500 square feet. Includes digital self diagnostics, thermostat, LED readout, secondary power outlet and cord wrap.