The Norseman indoor wood or coal furnace can easily heat any home with its 30,000 to 90,000 BTU’s output. It is designed to heat a home up to 1,500 square feet. Additionally, it features 18” log length, a coal capacity of 100 pounds, adjustable bi-metal thermostat provides automatic controlled combustion for even heating and single 550 CFM blower which provides efficient air flow through existing duct work for optimal performance. Adjustable bi-metal thermostat provides automatic controlled combustion for even heating. Heavy Duty 7 gauge steel firebox for years of service. Single 550 CFM blower provides efficient air flow through existing duct work. Large firebox holds enough fuel for several hours of heating per load. Large 12" x 12" x 7" feed door for easy loading. Accepts logs up to 18" in length or 100 lbs. of bituminous coal. Protective smoke curtain prevents smoke from escaping furnace. Adjustable, cast iron spin draft for additional burn control. Convenient ash door and large full-length ash tray for easy clean out and disposal. Includes heavy duty cast iron push-pull grate to ensure complete combustion. Two raised and tapered heat outlets provide easy connection for 8" heat ducts. Safety tested to UL 391. Heats up to 1,500 square feet.Up to 90,000 BTUs.