The AAA Outdoor Boiler wood/coal gasification boiler provides you with a fuel- and cost-efficient outdoor heating system that can be used in tandem with any interior heating system you currently have installed. This unique 120-gallon capacity gasification boiler can heat up to 3000 square feet. It can use either wood or coal for fuel, allowing you to supplement or even bypass local utilities. Firebox only has to be filled every 12 to 16 hours and unit requires virtually no maintenance. U.S.A. BTU Output: 130,000, Heating Capability (sq. ft.): 3,000, Blower Included: Yes, Blower (CFM): 148, Full Load Run Time (Hours): 12 - 16, Fuel Type: Wood / coal, Igniter: No, Thermostat Included: Yes, Firebox Size W x D (in.): 25 x 36, Max. Log Size Accepted (L in.): 36, Dimensions W x D x H (in.): 42 x 60 x 76 Unique gasification boiler with 120-gallon capacity Uses either wood or coal for fuel, allowing you to supplement or even bypass local utilities 1/4in. thick firebox Handles wood up to 3ft. long Fill firebox every 12-16 hours 3/16in. water jacket Firebox, flue, sides of ash pan and back of furnace are totally surrounded with water to capture all of the heat Unique smoke bypass system Easy-to-read water level sight float 75 CFM draft blower with solenoid shutoff Includes removable ash pan, pump, thermostat and outside light Easy to use Unit requires virtually no maintenance