This propane convection heater is like a bonfire without the open flame! In barns, large warehouses, and garages up to 1800 square feet, you'll feel the warmth, thanks to its efficient 360° heating radius. This versatile space heater runs for up to 36 hours on a full tank of propane and it's electricity-free (handy for emergencies). As you'd expect from ProTemp, safety and convenience are built in. Pros choose ProTemp.