Clayton Warm Air Wood Furnace, 135,000 BTU Per Hour, Heats Up To 3,000 Approximate Feet, Heavy Gauge 2 Piece Firebox Made From Cold Rolled Steel, Firebrick Lined For Long Life, Extra Heavy Duty Cast Iron Gates & Liners, Exterior From 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 Linger Life, 48"H x 24"W x 50.5"L Firebox Dimensions, 28" Log, 6" Fuel Collar, 13" x 18" Heat Outlet.