We know you need your equipment to work as hard as you do. Trust the Master® natural gas forced air torpedo heater to get the job done. It will warm up to 3800 sq-ft of your shop, barn, construction site, or wherever you need powerful, dependable heat. This high output heater's time-tested design includes the built-in convenience and advanced safety features you expect from Master® products. Master® built for power. Master® Gas Forced Air Torpedo Heater, 150000 Btu/hr Capacity, 120 VAC, 0.8 A, 60 Hz, 1/9 HP, 435 cfm Flow Rate, Natural Gas, Steel, Yellow, 26 in L x 9 in W x 15 in H, Import