The Dyna-Glo Pro 135,000 BTU portable multi-fuel forced air heaters offer improved circulation and a maintenance friendly design. The Comfort Control Thermostat conserves fuel and makes maintaining thermal comfort effortless. Digital Diagnostics ensures the 135,000 BTU's will always be ready to heat an area of 3200 square feet for 10 hours. 10 Inch Flat-Free wheels mean no flats, no down time.