forced air propane heaters provide instant heat even and feature Quiet Burner Technology, making them 50% quieter than a standard propane heater. The 170,000 BTU model heats up to 4,250 sq. ft. quick and effortlessly and maintains with a built-in thermostat. Includes a 10 ft. hose and regulator and also features variable output from 125,000 to 170,000 BTUs, and automatic solid state ignition for quick and reliable starting. Equipped with a high temperature safety shut-off switch and thermo-electric safety valve to shut down the unit in unsafe conditions, so you’ll have peace of mind to focus on the task at hand. With an approximate 17 hours of run time on low with a 100 lb. propane tank, whether on the worksite or in the garage, you’ll stay comfortably warm while getting the job done.