The Mr. Heater 30,000-60,000 Portable Forced Air Propane Heater keeps the cold out of the job site. The variable settings give you control with 30,000 to 60,000 BTU's heat. Connect to a 110VAC outlet and propane tank to stay toasty, whether you’re installing drywall or new brakes. Once lit, the continuous ignition and high output fan let the heat flow, covering up to 1,500 square feet. A 20-lb tank allows 12 hours of run time. The heater is equipped with an overheat detection system to keep you safe while keeping you comfortable. Work in warmth with the Mr. Heater 30,000-60,000 Portable Forced Air Propane Heater.