Bring powerful, dependable heat to large outdoor spaces with the Master forced air torpedo heater. This propane-powered unit warms up to 1, 500 sq. ft., making it perfect for shops, barns, construction sites, and more. It runs for up to 10.5 hours using a duo battery and electric cord power system and has a handle for easy transport. | Master Battery & Propane Forced Air Torpedo Heater - 60, 000 BTU - Yellow