170,000 BTU/Hr Pro Series Kerosene/Diesel Forced Air Heater with Thermostat. Heats up to 4,000 sq. ft. and runs approximately 10.5 hours on a full 13.5 gallon tank. It has contractor grade HDPE housing with fuel gauge and filler neck filter. It also has an auxiliary power outlet, large lighted power switch with weatherproof cover, 10" rugged pneumatic tires, extension cord cleats, and patented HSI technology. Great for large construction, commercial, and industrial applications.