The Dyna-Glow Delux 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. This multi-fuel forced air heater operates on 1 K kerosene, # 1 diesel, and # 1 fuel oil. The heating coverage area is up to 5,200 square feet. There are two heat settings at 180K and 220K for two heaters in one.