Desa Tech 25500 is a portable heater that provides an efficient and convenient source of heat. It's powered by kerosene or No. 1 fuel oil and has a capacity of 50,000 to 75,000 BTU per hour. The heated air output is 340 cubic ft. per minute, and the ventilating air temperature rise at the outlet can reach up to 190° F. With a 5-gallon fuel tank capacity, the heater can operate continuously for up to 9 hours at its maximum burning rate. It features an automatic ignition system, a built-in safety switch, and a manual reset switch for added safety.