Clayton Warm Air Wood Furnace, Heavy Gauge 2 Piece Firebox From Cold Rolled Steel, Maximum Output 160,000 BTU's Per Hour, Heat Capacity 3,600 SQFT, Firebrick Lined For Long Life, Extra Heavy Duty Cast Iron Grates & Liners, Exterior Front Mounted Shaker Handles, Twin 800 CFM Distribution Blowers, Front Mounted Smoke Curtain, Removable Ash Pan, Standard Forced Air Draft Kit With Remote Thermostat, Secondary Heat Exchanger With Firebrick Baffle For Longer Life, 48"H x 26"W x 62"L Firebox Dimensions, 18" x 18" Heat Outlet.