Level up with Master® 220000 Btu SilentDrive® kerosene/diesel forced air torpedo heater. Despite its powerful, high-Btu output, It's the quietest forced air heating solution for spaces up to 5500 sq-ft. In fact, heaters with SilentDrive® technology are 50% quieter and 46% more Energy efficient than equivalent conventional forced air heaters. An added bonus for your busy schedule: this durable, multi-fuel heater requires no routine maintenance to keep it running smoothly. Master® built for power. Master® SilentDrive® Air Forced Torpedo Heater, Lightweight, 220000 Btu/hr, 13 gal Tank, 1.67 gph Fuel, K-1 Kerosene/#1 Diesel Fuel/Jet A Fuel and #1 Fuel Oil, 5500 sq-ft Heating Area, 10 hr, 685 cfm, 82 dBA, 120 VAC, 3.15 A, 60 Hz, Import