A circulating-air, woodburning, heating stove/fireplace combination has a combustion chamber for burning fuel. The back of the stove has an inner wall defining the combustion chamber and a spaced outer back wall forming an air chamber between the two walls. An air inlet is provided at the bottom of the air chamber, and an electric fan or blower is attached to the inlet to force air into the space between the walls at the bottom. This air then passes upwardly in the airspace between the back walls and exits through several parallel heat tubes which extend across the top of the fire chamber. These heat tubes open at the front of the stove, so that the air forced through the airspace by the fan is moved into the room. A baffle is provided above the heat tubes to create turbulence in the combustion products for improving the heat exchange of these products with the air moving through the heat tubes prior to the discharge of the combustion products through a flue located in the top of the stove.

A broiler device for a space heating stove having an access opening in one of its generally vertical side walls to receive wood, charcoal or other suitable fuel for heating. The broiler device includes a frame detachably secured to the said generally vertical side wall, and a broiler tray adapted for vertically adjustable connection to the frame so that an open panel of the tray can be supported inside the stove in a generally horizontal position. The open tray supports a grille for holding food to be broiled at the vertically selected height above the fuel in the stove.

A high efficiency grate and stove heating unit for extracting useful heat from a fire, comprising in combination a low metal enclosure having an expansive top wall constituting a grate proper for supporting fireplace logs and the coals resulting therefrom, together with multiple heat exchangers in the form of plates or corrugation ribs on the top wall and means to cradle the logs thereof. Other plates or corrugation ribs extend downward from the top wall, and the plates can abut the bottom enclosure wall to constitute a reinforcement means. In one embodiment of the invention the enclosure includes an air inlet port connected with an electric blower for forcing air into the enclosure, together with multiple outlet ports from which the air, now heated, flows. A series of forward protruding nozzles is carried by the enclosure and communicates with the outlet ports to channel the heated air in directions away from the enclosure and its inlet port. Disposed between the blower and the fire area is a heat shield that intercepts radiant heat from the fire, which would otherwise impinge on the blower and cause over-heating of the same. The ribs or plates extending downward from the top wall of the grate form of enclosure constitute a series of internal compartments, and force the circulating air to follow tortuous or circuitous paths. In a preferred embodiment of the invention, the blower simultaneously pressurizes all the compartments, with each of the latter in turn communicating with one of the enclosure's outlet ports.

A space heating wood burning stove, formed as a rectangular fire box, having a plurality of horizontal flue ducts leading to a flue manifold, adapted to generate substantial vertical convection currents of air, and further including vertical fins to enhance said convection currents, and further including a plurality of draft valves in substantial alignment with respective ones of said flue ducts for efficient burning of wood within said fire box. Assembly of the fire box of the stove is completed under stressed conditions to prevent warping of the fire box panels from heating and cooling cycles.

A stove having an integral heat exchanger and a fan unit for forcing air through the heat exchanger and into a room where the stove is situated through hot air outlet openings in the stove front which are covered by perforated ceramic decorative cover plates. The heat exchanger extends along the rear and side walls of the stove and comprises a conduit of welded sheet metal construction similar to that of the stove walls wherein portions of the stove side walls also serve as the sides of the heat exchanger conduit. The decorative cover plates are retained in position by elastically deformable wire clips which partially encircle an edge of each cover plate and frictionally engage an outwardly projecting lip surrounding the hot air outlet openings of the heat exchanger conduit.