Patent ID: 6029648
Filing Date: 2000-02-29
Classification: F23B,F23L,F23M,F24H,Y02E

Abstract:
An furnace for combustion of wood a other combustibles comprising:a water box for containing water to be heated by the furnace;a fire box disposed within said water box with a fire door opening in the fire box;an air inlet means for air flow into said fire box to support combustion in the fire box;at least one flue for exhausting hot combustion gases from the fire box;a door for closing said fire door opening and for providing access to the inside of the fire box, said door having an inner wall for closing against said fire door opening and an outer wall spaced from said inner wall and forming an air passageway between said inner and outer walls, said inner wall having an inner wall opening through it into said fire box, and said door having at least one inlet into said passageway with said inlet offset from said inner wall opening into the fire box in the general plane of the door so ambient air flowing into said furnace flows into said inlet, through said passageway, and through said inner wall opening into said fire box; anda damper in said passageway at said inner wall opening into said fire box for controlling air flow into said fire box.