Abstract: A furnace including a housing and a firebox in the housing having a combustion chamber. The furnace includes a combustion air delivery system for delivering combustion air to the combustion chamber. The combustion air delivery system includes a manifold mounted outside the combustion chamber and extending vertically along the front face of the combustion chamber from a lower end to an upper end. An air blower is mounted on the manifold. The combustion air delivery system includes a primary combustion air passage for delivering air from the air blower to a primary combustion air outlet at the front face of the combustion chamber. The combustion air delivery system includes a secondary combustion air passage for delivering air to a secondary combustion air outlet positioned inside the combustion chamber adjacent the top face of the combustion chamber.

Abstract: A fire construction (10) comprising a firebox (12) defining a combustion chamber (14) in which fuel (not shown) can be burnt, a first air supply means (16) for delivering air into the combustion chamber (14) to support combustion of fuel therein, and a second air supply means (18) for supplying additional air to support combustion of fuel within the combustion chamber (14), the second air supply means (18) comprising a supply conduit (20) connecting the combustion chamber (14) with an air supply (22), the supply conduit (20) having a cross section (24) that increases as the supply conduit (20) opens into the combustion chamber (14).

Abstract: Disclosed is a fireplace which includes a firebase, a primary combustion zone with a first air supply unit, a secondary combustion zone, and an exhaust flue. The fireplace place also includes a charcoal/reduction layer which forms between the primary combustion zone and the secondary combustion zone, the arrangement and construction being such that the gases and/or particulate matter produced from the pyrolysis and/or combustion of the biomass fuel in the primary combustion zone have to pass over, or through, the charcoal/reduction layer prior to entering the secondary combustion zone and/or the exhaust flue. The fireplace also includes a second air supply unit for introducing heated secondary air into, or adjacent to, the secondary combustion zone, the arrangement and construction being such that the secondary air passes through (or adjacent to the region of) the charcoal/reduction layer to thus heat the secondary air.

Abstract: The invention relates to a hot air internal ignition burner/generator comprising an injection device used for producing a high-speed fuel gas mixture stream and for injecting said stream into the burner head (2) which is tabular-shaped and comprises in-series arranged therein a pressure recovery chamber (10), an igniting chamber (11) and simple or multiple diffusion means (24) which are fixed inside the head (2), where two chambers are jointed, wherein said diffusion means (24) comprise a central orifice provided with an igniting tube which penetrates therein and axially extends inside the pressure recovery chamber (10) in such a way that it defines the ignition chamber (43) provided with igniting electrodes (42) connected to the pressure recovery chamber (10) of the burner (2) via a calibrated orifice (46).

Abstract: A wood burning furnace providing, in sequential connection, an air box, a fire box with a wood storage box/primary combustion chamber and a secondary combustion chamber separated by an ash grate, a heat exchanger, an exhaust manifold, and a smoke stack. The air box has an input port attached to an intake air blower. The air box also has two dampers, a thermostatically controlled first damper providing controlled access to an updraft exhaust pipe connected to the smoke stack. The second damper provides controlled access to the wood storage box/primary combustion chamber.

Abstract: A device comprising an improved electrical hot-air gun for fast ignition of the charcoal-bed of a barbeque charcoal grill for home use having a very short distance between the front of the hot-air gun and the electrical heating wire of the heating assembly and a very high outlet temperature. The hot-air gun also has a scraper mounted on the igniter/heater front to be able to aid in cleaning the grating of a BBQ grill.

Abstract: A system and method to control image gloss in an electrophotographic system or the like using hot air convective heating of the toner image on a recording medium.

Abstract: A wood burning furnace having an enclosed combustion chamber including a top, a bottom, a back, a front and opposing side walls and a secondary combustion air admission chamber including a top, a bottom, a back, a front and opposing side walls, the bottom wall of the secondary combustion air admission chamber being arched and perforated, the bottom wall of the secondary combustion air admission chamber forming at least a portion the top wall of the combustion chamber

Abstract: A heat recovery device for use with a portable incinerator. The heat recovery device comprises first and second legs which support a heat exchanger thereon. An air flow path is formed from the bottom to the top of the first leg, through the heat exchanger and from the top to the bottom of the second leg. An open space is provided between the two legs and below the heat exchanger. A portable incinerator may be placed within this open space. When solid waste is burned within the incinerator, the exhaust port of the incinerator lies below the heat exchanger. A blower attached to the lower portion of the first leg creates air flow through the heat recovery device such that the air is heated in the heat exchanger by heat produced from the exhaust port of the portable incinerator. A tube is then coupled to the second leg in order to direct the heated air flow to the interior of an adjacent building.

Abstract: The space heating system has a stove (1, 2) with a sealed combustion chamber (3); air is heated in the stove in a heat exchanger (12) therein, and heated air is conducted through hollow blocks (80) of chamotte arranged, for example, as heating panels, heated walls, benches, floors or the like. The hollow blocks are formed, internally, with projections or obstructions (83) to increase heat transfer, and may be faced at the outside with decorative tiles. To seal the combustion chamber, a vertically movable panel, typically of fire-resistant glass, is slidably located in front of a fuel inlet opening (7). In operation, the panel is sealed, so that the combustion chamber (3) will receive air only under controlled conditions, in two air paths; a primary air path supplies air to a narrow space (22) below a fuel support grate (25), after being preheated by passing around an ash receiver (18); and a secondary air flow, passed through ducts (30) within the combustion chamber, and ejecting air towards the panel.

Abstract: This invention concerns a solid fuel stove, in particular a wood stove fitted with a device capable of neutralizing the polluting elements of burnt gasses and that comprises, in a conventional manner, a chamber of combustion formed by vertical walls and that extends between a grate and the burnt gas flue, characterized in that the aforesaid device (12) consists of a postcombustion chamber that extends obliquely through the chamber of combustion (1) and that forms a compulsory passage heated to a high temperature level by the fuel, with the burnt gasses circulating in this device from the bottom to the top and from one wall of the hearth to the opposite wall.

Abstract: A stove with a continuously open draft provides a fire chamber peripherally configured to cause circular motion of burning gases therein to provide substantially complete combustion of fuel. A continuously open elongate draft vent is positioned above and immediately inwardly of a door window to aid cleaning of that structure and to reinforce the circular motion of combustion gases. Baffles and exhaust dampers also are configured to aid the circular motion of combustion gases in the fire chamber. Heated surfaces defining the upper fire chamber walls catalyze the combustion reaction and rearward surfaces reflect radiant energy back into the combusting fuel to further aid combustion.

Abstract: A wood-burning stove comprising a body providing a primary combustion chamber and a secondary combustion chamber, primary air supply means to supply preheated air at lower and intermediate levels of the primary chamber, secondary air supply means to supply preheated air to the secondary chamber, and temperature actuated control means to regulate the supply of primary combustion air based on the temperature of flue gases entering the secondary combustion chamber.

Abstract: A freestanding wood, gas log or coal burning stove includes a pair of hinged glass or screen doors which are movable to storage compartments within the stove where they are completely concealed from view. In one embodiment, side panels are hinged to the stove frame assembly, and each door is hinged to one of the side panels in such a way that the door can be folded into a storage compartment between the stove frame assembly and the side panel. In another embodiment, fixed side panels define storage compartments between the side panel and the stove frame assembly, and each door slides into one of the storage compartments, In both embodiments, the storage compartment can include openings for circulation and heating of room air.

Abstract: The assembly is adapted for replaceable and operative installation within the opening of a standard fireplace. It comprises a combustion chamber and conduitry to accomodate ambient air entry into the chamber in a number of patterns and includes an arrangement for air preheating. Air is also heated by contact with the outside of the chamber and is expelled with mechanical assistance. Exhaust smoke is expelled through a baffle system in order to extract therefrom all useful heat.

Abstract: A circulating air wood burning heating stove/fireplace combination has a combustion chamber that is in the form of a shell defined by inner walls of the stove and a rearwardly disposed air outlet manifold. Spaced outer auxiliary back and top walls and the corresponding shell walls form therebetween air passages through which ambient air is recirculated into the room over the manifold. The manifold is provided with a plurality of spaced heat conductive metal strips disposed about its periphery. Several manifold embodiments include one or more finned air heating conduits which extend therethrough. A blower fan or pair of blower fans are used to circulate air through the air passages and in heat transfer relationship to the manifold. A valve, damper, and linkage control arrangement regulate the heat output and may be used upon starting of the fire to clear a column of cold air from the flue.

Abstract: A circulating air wood burning heating stove/fireplace combination has a combustion chamber that is in the form of a shell defined by inner walls of the stove and a rearwardly disposed air outlet manifold. Spaced outer auxiliary back and top walls and the corresponding shell walls form therebetween air passages through which ambient air is recirculated into the room over the manifold. The manifold is provided with a plurality of spaced heat conductive metal strips disposed about its periphery. Several manifold embodiments include one or more finned air heating conduits which extend therethrough. A blower fan or pair of blower fans are used to circulate air through the air passages and in heat transfer relationship to the manifold. A valve, damper, and linkage control arrangement regulate the heat output and may be used upon starting of the fire to clear a column of cold air from the flue.

Abstract: A wood burning stove comprises top and bottom portions and unitary metal side panels having inwardly extending manifold sections running from the rear of the stove towards the front. Each said manifold section is formed by bending the metal to form a channel which lies wholly inwardly of the outer plane of each such panel, a unitary rear panel having an inwardly extending manifold section across the rear of the stove. The side manifolds extend from the front to rear of the stove, the end of each manifold being closed. There is an opening in the rear portion of each said side manifold and an opening in each end of said rear manifold, said openings in the side manifolds being aligned with the openings in the rear manifolds to permit passage of air from the rear manifold to the side manifold.

Abstract: In a fuel burning stove having a heating chamber positioned above a firebox and covering a rear discharge opening as well as a major portion of the firebox upper wall, a vertical exhaust path is established between the discharge opening and the flue. A sliding baffle plate located in the heating chamber is manually controlled by a handle and externally mounted connecting link mechanism to selectively establish the vertical exhaust path or a tortuous exhaust passage. The tortuous passage is S-shaped causing hot gases to circulate through the heating chamber to increase the amount of heat radiated into the surrounding air. A forward damper responsive to movement of the baffle exposes a forward discharge opening when the vertical exhaust path is open to directly exhaust smoke from the forward region of the firebox prior to opening of the stove door to add fuel. The handle retains the door closed when the vertical exhaust path is closed by the baffle.

Abstract: A rectangular stove structure has a stepped top with a sloped intermediate top portion having heated air outlets. Room air is passed through U-shaped ducts arranged along the inside surfaces of the stove side walls, and firebrick is provided on the floor of the stove structure between these ducts. Air is drawn into the ducts through a side opening which may have a blower and conduit assoicated therewith. The door of the stove has rotary combustion air inlets, and a baffle plate is provided inside the door to provide primary air for the fire, and secondary air for improving air circulation and ventilation inside the stove. Domestic hot water can be heated at the rear of the stove structure in an annular chamber defined for this purpose at the connection for the exhaust gas flue. Domestic hot air can be supplemented by a plenum provided on the lower front top, and the plenum receives heated air from the outlets in the sloped intermediate top portion.

Abstract: A solid fuel burning modular stove fabricated from a plurality of metal assemblies includes a first assembly provided with a combustion chamber, an air duct at the lower front of the chamber communicating with the ambient air, a louver member inside the air duct varying the degree of admittance of air through the duct, flue pipe means for exhausting combustion products from the stove, a plurality of fire brick lining the floor, rear and side walls. Vertical ducts are positioned along the rear and side walls having inlet openings at their bottom and outlet openings at their tops, heated air rises through the ducts and discharges into the ambient air. A second assembly to be attached to the bottom of the first assembly comprising horizontal channel means in communication with the vertical duct inlets providing a blower to force outside air through the vertical ducts.

Abstract: An efficient space heating stove having a combustion chamber substantially completely enclosed with insulating firebrick whereby the operating temperatures within the combustion chamber can be maintained above the ignition temperature of the fuel being consumed. Combustible gases liberated by the wood fuel are burned as they pass through a perforated, hollow, tubular member located within the combustion chamber and through which the combustible gases must pass before they are exhausted from the stove. Fuel within the combustion chamber is efficiently burned before useful heat energy is extracted.

Abstract: The combination stove has a fire chamber that is partially cylindrical including a side loading door for loading wood or other combustible material such as coke or coal into the fire chamber. The front of the stove may be opened to enable viewing of the wood or coal burning in the stove by means of an arcuate sliding door that is operable to substantially totally close the chamber or open a section of the front thereof for viewing purposes. The sliding door is covered by a window construction including a tempered glass face. The stove is provided with an open base for supporting the chamber in a shroud covering the top and back of the chamber, preferably including blower means associated therewith. Particularly for wood combustion, the chamber is provided with a top draft extending longitudinally of the chamber and has supported therein a grate.

Abstract: A stove for burning solid fuels such as wood, briquettes, peat and the like includes a stove structure having a front and rear and two side walls. The front and rear walls have a width greater than the width of the two sidewalls, and one of the two sidewalls is provided with an access fire door for feeding the solid fuel into the side of the stove.

Abstract: An improved wood burning stove for providing heated air to a room or similar area includes an enclosed fire chamber, a hearth at the bottom of the fire chamber, draft inlet means at the front of the fire chamber and a flue at the rear of the fire chamber. Within the fire chamber is an enclosed air chamber having lower and upper portions; the lower portion communicates at the bottom of the stove with the ambient air and extends upwardly adjacent the rear wall of the fire chamber to a point below the flue, where it joins with the upper portion. The upper portion of the air chamber extends upwardly toward the front of the fire chamber at an acute angle with the horizontal, preferably between five and twenty-five degrees; at the forward end of the upper portion the air chamber communicates with one or more air pipes which extend to the front of the stove and there open to the ambient air.

Abstract: A circulating air wood burning heating stove/fireplace combination has a combustion chamber for burning fuel. The combustion chamber is in the form of a shell defined by inner walls of the stove and a rearwardly disposed air outlet manifold. Spaced outer auxiliary back and top walls and the corresponding shell walls form therebetween air passages through which ambient air is recirculated into the room over the manifold. The manifold is provided with a plurality of spaced heat conductive metal strips disposed about its periphery. An air inlet is provided at the bottom of the back air passage and an electric fan or blower is attached to the inlet to force air into the back air passage.

Abstract: A forced air, fuel burning heater is provided which includes a relatively large damper plate slideably mounted immediately below the top wall of the heater, to thereby insulate the top wall from the heat of combustion and thereby reduce the temperature and thus the tendency of the top wall to warp from excessive heat. The damper plate preferably includes a rearward edge which is doubled upon itself to further insulate the edge of the flue opening in the top wall from heat, where warpage commonly occurs. The disclosed heater also includes a separate blower assembly which may be selectively mounted on either side of the combustion chamber with equally effective air circulation, and the hearth plate includes an upwardly inclined forward edge portion for reflecting radiant heat back toward the heater and thus reducing the temperature of the adjacent floor surface.

Abstract: A wood burning stove is disclosed which includes a stove housing that defines an upper zone comprising storage and exhaust chambers, and a lower zone for accommodating a wood burning fire. The exhaust and storage chambers are separated by a divider, both chambers having bottom openings that communicate directly with the top of the lower fire zone. Covering one opening in the housing and providing access to the fire zone is a fire door while another opening provides access at the top of the storage chamber and is covered by a wood fill door. The exhaust chamber communicates with and discharges smoke into a stovepipe or flue retaining chimney. A supply of logs is loaded into the storage chamber through its fill door. These feed automatically and sequentially by gravity from the storage chamber bottom into the fire zone for consumption by a fire burning therein.

Abstract: A wood or coal burning stove has a main opening from the fire box into a heating chamber at a remote location from the flue exit from that chamber so the combustion gases must move around within the chamber before escaping and an auxiliary opening from the fire box directly to the flue exit, there being a movable closure which closes the auxiliary opening when the front door is closed and which is operatively connected to the front door so it is opened when the front door is opened.

Abstract: A wood and coal burning heating unit is provided for heating a residential building or the like. The unit includes a firebox having a double wall on its rear and top sections, with the back chamber and top chamber, which are formed between the respective double walls, being connected in flow communication. Air is blown into the back chamber, flows through the back chamber and top chamber and is expelled through a substantially horizontal, rectangular opening at the front of heating unit. A plurality of elongate, upstanding fins are provided in the top chamber so that the air flowing through the top chamber flows along the upstanding surfaces of the fins. Heat is conducted through the fins from the inner top wall of the firebox and is then transferred from the fins to the air flowing along the surfaces of the fins.

Abstract: Hinged doors are provided on the front of a stove for sealably closing across a large opening through which logs can be loaded into a firebox within the stove. A cylindrical draft chamber is formed on an exterior surface of one or each of the doors. A draft cap is rotatable on a threaded stud which is coaxially secured in the cylindrical draft chamber. The draft cap includes an annular flange forming a sliding close-tolerance fit with an interior cylindrical wall of the draft chamber so that the cap can be rotated to vary the size of the draft chamber to selectively restrict the flow of air from a source through the draft chamber to the firebox whenever the doors are closed.

Abstract: A forced air heating unit having a first U-shaped air channel with inlet vents adjacent the front, and a second U-shaped forced air channel interior said first forced air channel communicating with the first forced air channel via an opening in the common rear wall and having exit vents adjacent the front. A fan is mounted to the rear wall having the motor exterior the forced air channels with an impeller in the common rear wall opening. A conical deflector extends from the interior wall of the second forced air channel towards said rear wall opening. A refractory floor in the firebox includes front, side and rear vertical portions with top surfaces inclined towards the respective wall. The rear and side vertical portions exceed the height of a grate or andirons positioned on the refractory floor.

Abstract: A stove of the wood burning type is provided with a smoke passage having a main opening adjacent the access door of the stove and an auxiliary opening therein which is located further away from the access door and more closely adjacent the rear portion of the smoke passage and the chimney than the main opening. A regulator damper controls the rate of flow of products of combustion from the combustion chamber through the main opening and the smoke passage to the chimney, and an auxiliary damper normally closes the auxiliary opening when the access door is in a normally closed position.

Abstract: A woodburning heating apparatus capable of horizontal and updraft combustion has removable elements positioned within a relatively small enclosed volume to provide efficient and reliable operation in either combustion mode. The removable elements include the wear plates, fireback, and damper assembly. The wear plates and fireback define primary, secondary, and night air supplies for the apparatus. An articulated damper control mechanism provides resistance against impinging combusted gases in at least one position of the damper. The damper construction allows, in either the horizontal or updraft combustion modes, the provision of both top exiting and rear exiting flue connections. Baffles are provided at the combusted gas exit from the primary combustion chamber to uniformly spread the combusted gases exiting the primary chamber over a substantial volume so that localized heating of the apparatus does not occur.

Abstract: A wood stove is of all welded steel plate construction except for the door which is of heavy cast iron. When the door is closed, the only source of combustion air is through an adjustable air inlet on the face of the door. The door is hollow and serves to preheat the incoming air. The inner wall of the door divides the incoming air into lower and upper, primary and secondary, respectively, combustion air flows. The stove has an internal upper baffle running from rear to front which helps to promote air flow and combustion efficiency and to knock out entrained matter from the products of combustion. The flue connection is in the rear of the stove above the baffle and is stepped into the back of the stove to allow the stove to be fitted against a wall.

Abstract: A stove comprises a firebox formed of two U-shaped interfitting members of steel plate and a U-shapted one piece base. Dual primary and secondary draft air channels extend along the bottom of the firebox from front to back immediately underneath the fire and upwardly at the rear of the firebox. A first or larger channel provides primary combustion air to the fire and the second channel extends farther upwardly to the region where volatile gases would enter the flue to secure more complete combustion thereof. The dual draft channels are controlled by an automatic draft device at the front of the stove through which the draft air is introduced. A heat shield at the rear of the stove cooperates with the one piece base for delivering heated air forwardly to the living area in front of the stove.

Abstract: A passive type of space heater having a vertical air heating duct located at the rear of the combustion chamber and a flue duct extending through the air heating duct with its inlet located so as to draw the flue gases from the combustion chamber around the surfaces of the air heating duct. Air for combustion is supplied to the top of the combustion chamber by an air supply duct which extends inside of the flue duct and has orifices to provide air in the flue duct for secondary combustion of the flue gases passing through the flue duct. The air supply duct also has an ejector to draw a portion of the flue gases into the air supply duct for recirculation to the combustion chamber for tertiary combustion. A separate air supply duct is provided for supplying air for combustion during start-up.

Abstract: 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.

Abstract: An improved wood burning stove for providing heated air to a room or similar area includes an enclosed fire chamber, a hearth at the bottom of the fire chamber, draft inlet means at the front of the fire chamber and a flue at the rear of the fire chamber. Within the fire chamber is an enclosed air chamber having lower and upper portions; the lower portion communicates at the bottom of the stove with the ambient air and extends upwardly adjacent the rear wall of the fire chamber to a point below the flue, where it joins with the upper portion. The upper portion of the air chamber extends upwardly toward the front of the fire chamber at an acute angle with the horizontal, preferably between five and twenty-five degrees; at the forward end of the upper portion the air chamber communicates with one or more air pipes which extend to the front of the stove and there open to the ambient air.

Abstract: A fireplace heater unit having outside air forced around and over the heater unit before being discharged from the bottom front of the unit.

Abstract: A heater stove apparatus is disclosed as including an enclosed stove housing having a fire chamber in which a suitable fuel is burned for heating. A heat collector manifold is provided for receiving the combustion products from the fire chamber and a plurality of heat pipes extend between the fire chamber and the heat manifold for delivery of heat and combustion products to the heat collection manifold. An air flow path extends generally vertically the height of the heat pipes and horizontally along one of the dimensions of the stove housing with the path being defined in part by the bottom surface of the heat manifold in an upper surface of the fire chamber. A means is provided for circulating air generally through the stove housing along the air flow path. A unique draft door arrangement is provided which rids the fire chamber of smoke prior to the door being opened for access to the interior of the fire chamber.

Abstract: A fireplace and room heater that makes use of both natural air convection and forced air principles to efficiently heat an adjacent room. The fireplace and heater is freestanding and includes a firebox that is enclosed on three sides by a shell. The shell forms an air space between its walls and the firebox that is used for passage of air. A bulkhead separates the space into two distinct plenum chambers, an upper chamber and a lower chamber. A blower is provided at the rear of the unit. An intake of the blower opens into the lower plenum chamber. A discharge of the blower opens into the upper plenum chamber. Air is drawn through the lower plenum chamber by the blower and is forced outwardly through the upper plenum chamber through the blower discharge. The blower is controlled by a rheostat and thermostat to facilitate selective adjustment of air flow through the unit.

Abstract: An air heating chamber is supported to project into a stove through an opening provided in the rear wall of the stove by a mounting plate mounted to the exterior of the stove rear wall. The mounting plate which forms the exterior end wall of the heating chamber, includes laterally spaced heating chamber inlet and outlet openings. A blower is detachably mounted to the exterior of the mounting plate in registration with the heating chamber inlet opening to deliver cool forced air into the heating chamber. After circulating therethrough, the air exits the heating chamber through the outlet opening and flows into a hot air manifold, which is also detachably mounted to the exterior of the mounting plate. The manifold includes an upwardly extending inlet chamber with a hot air inlet at its lower end aligned with the heating chamber outlet opening. A horizontal outlet chamber is attached to the top end of the inlet chamber to extend laterally along the back of the stove.

Abstract: An apparatus for extracting heat from the waste gases of a stove to heat the air in the room. The apparatus is mounted on the stove and includes a central chamber in which an inner core, having a plurality of passageways, is positioned. Waste gases from the stove enter the central chamber, pass through the passageways of the inner core so as to heat the air surrounding the inner core, and then exit from the central chamber. A removably mounted closure is mounted on the top end of the central chamber to enable cleaning of the insides of the passageways. A heat shield which extends below the bottom end of the central chamber so as to surround the back and sides of the stove is provided to protect adjacent walls from the heat radiated by the stove.

Abstract: A firebox including front, rear and opposite sides interconnected by means of a bottom side at their lower ends and by a top side at their upper ends is provided. Outer rear and bottom walls extend between the rear marginal portions of the opposite sides rearwardly of the rear side and between the lower marginal portions of the opposite sides and the lower marginal edges of the rear wall and the front side below the bottom, respectively, defining a rear to front extending flow passage between the bottom side and wall and a downwardly extending flow passage between the rear side and rear wall. The interior of the firebox includes hollow upper opposite side front to rear extending side manifolds and an upper front transverse manifold extending between and communicated with the forward ends of the side manifolds.

Abstract: A wood burning stove, a free standing fireplace or fireplace insert is constructed to receive one of three possible types of inserts to make the unit adaptable to a convection, hot air or hot water heating system. The wood or like fuel combustion rate is automatically controlled by a temperature sensor and draft control system. The insert may be a baffle structure, an air to air heat exchanger or an air to water heat exchanger.

Abstract: Fire preventing shielding and air circulation apparatus for use with a box-type stove includes means for forming a chamber bounded at its top by the bottom of the firebox of the stove using a flat panel and upwardly extending apertured sides. A preferred embodiment also includes a stack formed on and bounded by the rear side of the stove and connected to communicate with the chamber.

Abstract: A wood burning stove having an enclosure in which is located a first, V-shaped baffle plate extending horizontally from the front wall of the enclosure but spaced from the rear wall thereof, a second flat baffle plate having a rear edge in engagement with the rear wall of the stove enclosure and extending across the enclosure with the front edge thereof spaced from the interior of the front wall of the stove to define a vent space leading from the rear of the enclosure over the top of the V-shaped baffle plate, up the front wall and then back towards the rear wall over the top of the second, flat baffle plate to a flue opening, side air channels are provided to heat room air.

Abstract: The specification discloses a mobile home heater taking combustion air from the outside and operable selectively as a stove and a fireplace and being double walled in its back sides and bottom. In operation as a stove, combustion air flows into a bottom passage covering the bottom of the fire chamber, up a back passage covering the back of the fire chamber and down a preheating passage in the back passage and into the lower portion of the fire chamber, secondary air also flowing from the back passage into the upper portion of the fire chamber. For fireplace operation, a door is opened to the fire chamber and also opens ports from the bottom passage to supply air through the door opening, a thermostat controlled damper to the preheating passage closing. An injection tube leads from the back passage into a stack to minimize condensation in low combustion operation, and a second air injection tube in the upper portion of the stack has a thermostat controlled inlet valve closed when the stack is hot.

Abstract: The furnace for burning wood or coal has a cabinet with a front wall and interconnected spaces between the inner and outer walls at the sides, top, bottom and rear. One of two outer walls have an inlet and outlet for flow of air to be heated. There are aligned flue openings in the upper portion of one of the sets of spaced walls. A grate and an ash pan below are mounted within a lower portion of the cabinet. The front wall has at least one opening closed in an airtight manner by one or two doors. A damper, having a pipe and plate pivotally mounted on the top of the pipe at its front end, is connected to a bimetallic thermostat above it. Both are mounted on the front of the furnace. The thermostat is mounted for movement to open the damper. The front wall of the cabinet or the door, when there is one door, separates the thermostat from the fire chamber within the cabinet above the grate.