The Sunfire 150 is the ultimate portable heater providing 150,000 BTU's of diesel-fired infrared radiant heat that can heat objects and people directly. It is quiet and virtually odorless with ulta low emissions. It has multiple handles for for easy rolling and lifting. It also runs of diesel or No. 2 fuel. It has a 19 gallon fuel tank, with up to 19 hour run times. it heats up to 1300 sq. ft. of space. It needs 120V power source to run. There is a high and a low setting, it is also wired for optional thermostat use. Compatible with generator or 800W+ pure sine inverter. Heated fuel filter for quick start-up in cold conditions.