Convenient ash door and large full-length ash tray for easy clean out and disposal Works with forced air unit Includes heavy duty cast iron push-pull grate to ensure complete combustion One 550 CFM blower Heavy duty cast iron feed door Adjustable bi-metal thermostat provides automatic controlled combustion for even heating Heavy Duty 7 gauge steel firebox for years of service Large firebox holds enough fuel for several hours of heating per load 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 with two raised and tapered heat outlets provide easy connection for 8 heat ductsArea Heated (sq. ft.): 1,500 Blower (CFM): 480 BTU Heat Output: 90,000 Burn Time: Up to 11 Hours Collection: Norseman Depth: 40 Firebox Capacity (cu. ft.): 2.25 Fuel Type: Wood Coal Height: 40 Log Size (max): 18 Width: 21-1 2