Abstract: A unitary firebox enclosed by a cabinet through which air is circulated for heating purposes. A blower forces air into the interior of the firebox through louvers located on the opposite side walls at a level adjacent the fire. Secondary air is drawn into a secondary combustion chamber to assist in complete combustion of the gases. A hinged door for the firedoor is held closed by a toggle latching arrangement, and the door is adjustable in order to assure a tight seal even if warpage should occur. A bypass damper may be opened to assure that smoke and ash are drawn into the flue instead of drifting out through the firebox door during the loading of fuel.