Abstract: A wood stove defining an upper combustion chamber and a lower fire box having two inwardly and downwardly angulated opposed fuel chutes for gravitational feeding of fuel to the fire box for extended burning. A rectilinear air channel spaced apart from a back wall of the stove, and structurally attached thereto, provides a channel for combustion products and byproducts to pass from an upper inner portion of the stove adjacent a chimney port downwardly to the fire box to pass through the primary fire zone for more complete combustion of the combustion products and combustion byproducts to enhances heat production and reduce wasting of smoke generating particulates and vapors.

Abstract: There is provided a solid fuel stove having a burn chamber including at least one side wall and a firebox. The firebox is located a distance from the side wall. The firebox generates ash while burning solid fuel. At least one baffle contacts the firebox and the side wall. An amount of ash which escapes from the firebox is directed back to the firebox and the heat generated by the firebox will be readily concentrated because of the baffle.

Abstract: A bio-mass fueled boiler operating at delivered efficiencies in excess of 90%. Pre-heated, pressurized primary combustion air is supplied to a primary burn chamber via horizontal and vertical orifice containing conduits. Exhaust gases are directed past a reflective secondary burner supplying pre-heated, pressurized secondary combustion air into a secondary burn/ash collection chamber. Exhaust gases are directed from the secondary burn chamber via exhaust conduits having axial and cross-sectional shapes and wall geometries that promote internal turbulence and heat transfer. One or more gas/oil fired burners are fitted to or between the primary and secondary combustion chambers. Several operating modes are provided via associated blowers, air baffles, liquid and gas fuel conduits, pumps and sundry stove sensors and servos coupled to microprocessor control circuitry.

Abstract: A biomass stove includes a housing enclosing a firebox that defines a ceiling portion opposite a bottom, a firepot disposed within the firebox, an air intake assembly coupled to the firebox, and at least one duct disposed entirely inside the firebox and extending between the ceiling portion of the firebox and the air intake assembly. The duct(s) provide a heat exchanging flow path for ambient air entering the air intake assembly, where the ambient air is heated within the duct(s) prior to exiting through the ceiling portion of the biomass stove.

Abstract: A draft control system and method can provide for automated control of the air drafting for heating systems. In accordance with an exemplary embodiment, an exemplary draft control system comprises at least one draft plate and a draft plate control system. Draft plate control system can comprise a control unit, one or more input devices, and one or more actuation systems. During operation, the control unit can receive a signal from an input device and use the actuation system to automatically adjust the amount of air intake by controlling movement of one or more draft plates.

Abstract: A burnpot for a solid particulate stove is disclosed. The burnpot includes a bottom cover, a top cover, two side plates connecting the top cover and the bottom cover, a bottom grate having a plurality of bottom grate apertures disposed therein and positioned intermediate the bottom cover and the top cover, a top grate having a plurality of top grate apertures disposed therein and positioned intermediate the bottom grate and the top cover and an air passageway configured to direct air to a burn chamber of the burnpot through the bottom grate and the top grate.

Abstract: An improved solid fuel combustion apparatus intended for use in residential or light commercial settings capable of sustaining a controlled, continuous blue flame burn, resulting in high efficiency heat output with low emissions and low ash. The combustion apparatus is further capable of being thermostatically controlled, turning off combustion of the fuel when a desired temperature is reached and automatically re-igniting when more heat is called for, and also comprises improved safety features.

Abstract: An adjustable primary air supply for wood burning device comprises at least one but preferably two thermostatic bimetal elements which, by bending with temperature variations, directly actuate a flap that opens and closes the air entry opening. Primary Air is the air used to control the burn rate and it is adjusted in order to achieve the desired burn rates and Secondary Air is the air used to complete the combustion and is not adjustable. Using these two sources of air, the invention consists of a device, which allows the primary air supply to remain open until proper burning is established. Therefore, when the temperature of the appliance rises, the combustion air gradually decreases to its preset value by having the primary air supply automatically shut off as temperature increases. A higher temperature indicates that the wood is sufficiently hot to decompose into flammable gases, so only secondary air is required to continue the combustion process.

Abstract: A combination of a wood stove and radon collection system. A radon collection tube location in the basement of a building is connected via conduits leading into the combustion chamber of a wood stove. Means secure the radon collection outlet to the stove between the stove door and the stove main body. Metal strips extend across gaps formed between the stove door and stove main body when the outlet is in the installed position.

Abstract: The solid fuel stove includes a combustion chamber having an air inlet and a gas outlet and two blowers driven simultaneously by a single motor. A first one of the two blowers is upstream of the air inlet and propels a comburent air flow in the combustion chamber. A second one of the two blowers is downstream of the gas outlet and draws an exhaust gas flow from the combustion chamber. Both blowers can advantageously be driven by a single motor.

Abstract: A wood burning stove is provided. The combustion chamber in which the fire occurs has a baffle plate that is moveable to direct air flow through one of two different pathways from the combustion chamber to the chimney. When in a first position, the baffle plate forces the air and smoke to move through a first pathway; when in a second position, a by-pass pathway is opened, allowing air and smoke to move through a second pathway. The stove can have a door in the front wall, or the top wall, or both walls, to provide access to the combustion chamber.

Abstract: A combustion air and exhaust gas balancing system for use with a direct-vent heater appliance. The balancing system includes a combustion air valve in fluid communication with a combustion air duct and an exhaust gas valve in fluid communication with an exhaust gas duct. The combustion air valve is operatively coupled to the exhaust gas valve with an actuator. The combustion air and exhaust gas valves are shaped and sized so that a single operation of the actuator simultaneously adjusts the flow of combustion air into the firebox and the flow of exhaust gas out of the firebox and provide selected flame characteristics in the firebox. In one aspect of this embodiment, a movement of the actuator in a first direction simultaneously increases the flow of combustion air and exhaust gas, and a movement of the actuator shaft in a second direction simultaneously restricts the flow of combustion air and exhaust gas.

Abstract: An automatic air intake control includes a timing mechanism that regulates the amount of air entering a combustion chamber enclosure during combustion of a fuel. The amount of air is regulated to provide an efficient and clean burn of a solid fuel. The control may include a cover, an actuating assembly, and a controller. The cover is movable between open and closed positions relative to an air passage opening into the combustion chamber enclosure. The actuating assembly is coupled to the cover and configured to move the cover between the open and closed positions. The controller is coupled to the actuating member and configured to control the position of the cover through the actuating member to regulate the air intake into the combustion chamber. The controller may be a time-based device such as a timer, or may be any other device that uses inputs associated with the combustion of fuel in the combustion chamber or a user's preferences for the characteristics of combustion in combustion chamber.

Abstract: A wood burner includes a wrapper. A firebox is positioned in the wrapper that defines a combustion chamber. An air inlet is placed in communication with an external air supply. The air inlet includes a conduit to conduct the external air to the combustion chamber and a second conduit. A manifold is positioned above the firebox. The manifold is in communication with the second conduit, and includes one or more manifold chambers for permitting the external air received thereby to become heated. A plurality of air tubes connect to the manifold to receive the heated external air from the manifold, each plurality of air tubes including a plurality of apertures to direct the heated external air into the combustion chamber adjacent an upper inner surface of the firebox.

Abstract: An automatic air intake control includes a timing mechanism that regulates the amount of air entering a combustion chamber enclosure during combustion of a fuel. The amount of air is regulated to provide an efficient and clean burn of a solid fuel. The control may include a cover, an actuating assembly, and a controller. The cover is movable between open and closed positions relative to an air passage opening into the combustion chamber enclosure. The actuating assembly is coupled to the cover and configured to move the cover between the open and closed positions. The controller is coupled to the actuating member and configured to control the position of the cover through the actuating member to regulate the air intake into the combustion chamber. The controller may be a time-based device such as a timer, or may be any other device that uses inputs associated with the combustion of fuel in the combustion chamber or a user's preferences for the characteristics of combustion in combustion chamber.

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 heater for burning fuel having a hollow enclosure with an air inlet, and a combustion gas outlet. The enclosure has an exterior heat exchange wall preferably directly exposed to ambient air and an interior surface defining a combustion chamber. The enclosure has a body with front and rear openings into which are fitted a front panel and a rear panel defining joints therebetween. The interior surface of the enclosure is coated and joints are sealed with heat resistant anti-oxidant material, for example: porcelain enamel, having a co-efficient of thermal expansion not substantially greater than the co-efficient of thermal expansion of the enclosure.

Abstract: A solid fuel cooking device incorporates a combustion chamber bound by an open upper side and an open lower side and is substantially closed on four sides by a retaining wall. The combustion chamber is covered from above by a cooking surface grate and below by a solid fuel support grate where the fuel support is disposed within the retaining wall below and parallel to the cooking surface grate. A housing is attached to the exterior of the retaining wall creating an air space between the housing and retaining wall. The cooking device uses a unique arrangement of gas jets to ignite the solid fuel where the gas jets are mounted horizontally within the retaining wall below the fuel support platform, injecting the lit gas beneath the solid fuel positioned upon the fuel support.

Abstract: A wood burner includes a wrapper. A firebox is positioned in the wrapper that defines a combustion chamber. An air inlet is placed in communication with an external air supply. The air inlet includes a conduit to conduct the external air to the combustion chamber and a second conduit. A manifold is positioned above the firebox. The manifold is in communication with the second conduit, and includes one or more manifold chambers for permitting the external air received thereby to become heated. A plurality of air tubes connect to the manifold to receive the heated external air from the manifold, each plurality of air tubes including a plurality of apertures to direct the heated external air into the combustion chamber adjacent an upper inner surface of the firebox.

Abstract: The invention relates to a burner for solid fuel containing a space for a solid fuel to be burned, in which solid fuel space the flow of gas is arranged to be possible. The burner comprises at least one fire pipe (3,13) inside the solid fuel space, through the wall of which a possibility for gas flow is arranged.

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 wood burner includes a wrapper. A firebox is positioned in the wrapper that defines a combustion chamber. An air inlet is placed in communication with an external air supply. The air inlet includes a conduit to conduct the external air to the combustion chamber and a second conduit. A manifold is positioned above the firebox. The manifold is in communication with the second conduit, and includes one or more manifold chambers for permitting the external air received thereby to become heated. A plurality of air tubes connect to the manifold to receive the heated external air from the manifold, each plurality of air tubes including a plurality of apertures to direct the heated external air into the combustion chamber adjacent an upper inner surface of the firebox.

Abstract: A wood burning stove is provided. The combustion chamber in which the fire occurs has a baffle plate that is moveable to direct air flow through one of two different pathways from the combustion chamber to the chimney. When in a first position, the baffle plate forces the air and smoke to move through a first pathway; when in a second position, a by-pass pathway is opened, allowing air and smoke to move through a second pathway. The stove can have a door in the front wall, or the top wall, or both walls, to provide access to the combustion chamber.

Abstract: A wood burner includes a wrapper. A firebox is positioned in the wrapper that defines a combustion chamber. An air inlet is placed in communication with an external air supply. The air inlet includes a conduit to conduct the external air to the combustion chamber and a second conduit. A manifold is positioned above the firebox. The manifold is in communication with the second conduit, and includes one or more manifold chambers for permitting the external air received thereby to become heated. A plurality of air tubes connect to the manifold to receive the heated external air from the manifold, each plurality of air tubes including a plurality of apertures to direct the heated external air into the combustion chamber adjacent an upper inner surface of the firebox.

Abstract: A portable stove and heater adapted for outdoor or camp use. The stove is comprised of at least three concentric walls affixed to a floor with vents placed in each of the walls to permit multiple pathways for transiting air to be heated prior to entering a combustion chamber.

Abstract: A stove for solid fuel, with sensor controlled, motor driven adjustment means for respective different types of intake air and with a control unit which is programmable for selective control of the adjustment means in order to optimise the combustion under various operational conditions, in particular during a lighting up phase, an operative phase of high or low effect, a refiring phase, and a burn-out phase.

Abstract: A heater for burning fuel having a hollow enclosure with an air inlet, and a combustion gas outlet. The enclosure has an exterior heat exchange wall preferably directly exposed to ambient air and an interior surface defining a combustion chamber. The enclosure has a body with front and rear openings into which are fitted a front panel and a rear panel defining joints therebetween. The interior surface of the enclosure is coated and joints are sealed with heat resistant anti-oxidant material, for example: porcelain enamel, having a co-efficient of thermal expansion not substantially greater than the co-efficient of thermal expansion of the enclosure.

Abstract: A wood burning stove in the shape of a barrel having both primary and secondary air inlets for supplying clean combustion. Primary air is fed into the stove from above the door. Secondary air is fed into a heating duct which extends along the bottom of the stove to be preheated. The heating duct empties the preheated air into a plenum formed in the end of the stove remote from the door. Air admitted to the plenum is additionally heated by exposure to a series of heat transfer fins within the plenum. The shape of the plenum is such that the velocity of air in the central portion of the plenum is the slowest, allowing for efficient heat transfer from the plenum walls and fins to the air passing through. A baffle mounted in the stove above the fire shields the fire from the exhaust outlet. Secondary air is admitted into the interior of the stove from the plenum from a first set of ports near the top of the plenum.

Abstract: A portable solid-fuel burning camp-stove with a unique air supply system that allows for sufficient thermal power output to facilitate cooking while keeping the size of the combustion chamber small enough to allow for acceptable packing weight for backcountry hiking. Pack stoves powered by gas or liquid fuels have the major disadvantages of the need to bring fuel and limited fuel supply. Solid fuel stoves have the advantage of being able to use fuel straight from nature in the form of wood, there is no need to carry fuel, generally these stoves are too heavy for backpacking since they need a large combustion chamber which makes these stoves to heavy for back packing. This invention allows for adequate combustion in an acceptably small chamber by blowing additional air into the combustion chamber for a higher combustion rate. The air is blown in by mouth through a hose and nozzle arrangement, thereby eliminating the need for extra air-pump hardware.

Abstract: A combustion system for burning firewood including a combustion chamber defined by front, rear and side walls, a ceiling and a bottom. An access door is provided for addition of fuel into the combustion chamber. A substantial amount of combustion air enters the combustion chamber near the top of the fueling doors via apertures and is directed down the face of the fueling doors providing cooling. A geometry of the air metering orifice is either fixed or of limited adjustability such that the minimum flow of combustion air required for flaming combustion of a full load of fuel is maintained at all times. The combustion air flow cannot be reduced beyond a certain point and thus smoldering and very low air/fuel ratios are avoided.

Abstract: An improved grate for burning solid fuel having a support for the fuel, a blower for transporting air through the support, a multiplicity of orifices jets uniformly distributed across the entire area of the grate and directed through the support generally upwardly to transport preheated air toward the lower surface of the solid fuel. A trough located immediately below the support, and in close proximity to the lower surface of the solid fuel, for collecting a layer of glowing coals and providing a combustion zone in troughs between the supports. Internal air transport tubes within the support provide passageways for air to flow from the blower out of the grate. A low thermal mass heat reflector may be used with the grate for absorbing radiant energy from the combustion zone and reradiating thermal energy over the fireplace grate and out of the fireplace.

Abstract: A burner system is described for burning granular pellets and similarly sized solid biomass heating fuel, e.g. wood pellets. It includes an air tight fire chamber having an exhaust outlet in an upper region thereof and a burner (10) in the bottom thereof for converting the solid fuel to fuel gases and ash in the presence of a limited air supply and combusting the gases formed. The burner comprises upright co-axial inner (12) and outer (11) cylindrical walls providing a confined central gasification/combustion chamber surrounded by an annular combustion air manifold (15). The annular combustion air manifold (15) is closed at the top and bottom with an air inlet (16) in the outer wall and a plurality of spaced aperatures (17) arranged in upward rows in the inner cylindrical wall providing air inlets from the combustion air manifold to the combustion zone of the chamber. A grate at the bottom of the gasification/combustion chamber holds the solid fuel while allowing ash to pass through the grate.

Abstract: The furnace is intended for burning solid fuel (mainly fire-wood) in continuous mode of operation, with significant amount of heat released in the form of hot combustion products usable in wood-drying installations, for house heating, destroying of refuse, etc. The invention allows simplifying the design of the furnace, features high efficiency of fuel burning and high power density, and improves reliability and serviceability. The furnace includes the shaft loading hopper (1), the combustion chamber (2) located under the loading hopper (1), and the expansion chamber (3) located behind the combustion chamber (2) and provided with the forced ventilation (5). The atmospheric air, heated to the temperature of combustion products in the expansion chamber (3), is supplied to the combustion chamber (2).

Abstract: A heating stove which is constructed from a generally cylindrical hollow container having a concave or convex rearward end, a baffle plate, a front facing end including a door, an extended ashtray, an air intake mounted on the door, a base and a flue mounted on the top. The entire casing is glass lined and is preferably made from discarded or recycled hot water tanks although other containment shapes may be successfully utilized. The base consists of legs attached to the bottom of the stove, with two legs supporting the front and in the back. From an ecological point of view it would be desirable to recycle used or discarded hot water tanks for a useful purpose such as modifying the tanks into wood burning stoves, thereby reducing the environmental contamination and creating an inexpensive low maintenance heating device.

Abstract: An open-flued, liquid-fuel, leaktight, low-power individual domestic heating appliance (1), in which means for removing the burnt gases derived from the combustion, and also means for feeding in oxidant gas (air), are mounted directly on an external structure (5) , such as an outside wall, which may be a bearing wall, or the roof of a dwelling or a room to be heated, without connection to a chimney, comprises a burner pot (4) containing a catalyst (15), preferably made of refractory steel, which stabilizes the flame and which has a nominal heat output of between 50% and 100%, and preferably between 75% and 100%, of the said output of a conventional burner of the same dimensions connected to the chimney of a dwelling.

Abstract: A combustion system includes a primary combustion chamber divided into left and right sides by fuel-retaining standards defining a canyon or void extending into a secondary combustion chamber is provided. The combustion system includes an automatic air setting mechanism for controlling an air delivery system in the combustion system comprises. The automatic air setting mechanism includes a control for controlling an air passage of the air delivery system and a lock for locking the control. A sensor is also provided which senses the temperature of the combustion chamber so that when the temperature reaches a predetermined value the locking mechanism releases the control.

Abstract: A combustion system for burning firewood including a combustion chamber defined by front, rear and side walls, a ceiling and a bottom. An access door is provided for addition of fuel into the combustion chamber. A substantial amount of combustion air enters the combustion chamber near the top of the fueling doors via apertures and is directed down the face of the fueling doors providing cooling. A geometry of the air metering orifice is either fixed or of limited adjustability such that the minimum flow of combustion air required for flaming combustion of a full load of fuel is maintained at all times. The combustion air flow cannot be reduced beyond a certain point and thus smoldering and very low air/fuel ratios are avoided.

Abstract: A wood burning stove is provided. The combustion chamber in which the fire occurs has a baffle plate that is moveable to direct air flow through one of two different pathways from the combustion chamber to the chimney. When in a first position, the baffle plate forces the air and smoke to move through a first pathway; when in a second position, a by-pass pathway is opened, allowing air and smoke to move through a second pathway. The stove can have a door in the front wall, or the top wall, or both walls, to provide access to the combustion chamber.

Abstract: A combustion system for burning firewood including a combustion chamber defined by front, rear and side walls, a ceiling and a bottom. An access door is provided for addition of fuel into the combustion chamber. A substantial amount of combustion air enters the combustion chamber near the top of the fueling doors via apertures and is directed down the face of the fueling doors providing cooling. A geometry of the air metering orifice is either fixed or of limited adjustability such that the minimum flow of combustion air required for flaming combustion of a full load of fuel is maintained at all times. The combustion air flow cannot be reduced beyond a certain point and thus smoldering and very low air/fuel ratios are avoided.

Abstract: A heating apparatus comprises a combustion chamber, formed of an assembly having a rear wall, two lateral walls, an upper wall and a lower wall. The combustion chamber has at least one outlet for flue gases. The walls forming said combustion chamber are configured to have standard dimensions so that the heating apparatus is configurable to operate with a variety of fuels including solid fuels, liquid fuels and gas fuels.

Abstract: The heating device has a housing and a liquid containing compartment defined inside the housing. A heating chamber is disposed inside the housing and the compartment. A fire chamber is disposed inside the heating chamber that produces hot combustion gases. A separation channel is defined between an outer wall of the fire chamber and the outer wall of the heating chamber for conveying the air from the first air inlet into the heating chamber. The separation channel also creates an important insulation between the fire chamber and the compartment so that the combustion material in the fire chamber burns at a sufficiently high temperature to prevent the formation of tar accumulations on the inside walls of the various ducts. Also, the separation channel maintains a suitable temperature of the outer wall of the fire chamber to reduce the risk of cracking and to prolong the useful product life of the fire chamber.

Abstract: This invention relates to heating apparatus and particularly compact heating apparatus fuelled by a flammable fluid such as gas in which a visible flame is provided. The appearance of the visible flame and the fireplace setting within the heating apparatus is enhanced by the provisions of a reflective means positioned behind the fuel assembly to reflect an image of the assembly and/or the flame towards a viewing port in the front of the heater. Additionally or alternatively, the heater apparatus provides an exhausting of the emissions of the primary combustion directly into the room in which the heater is housed to return much of the otherwise exhausted heat into the room. The exhaust is put through a secondary combustion chamber including or comprising a catalytic converter before being exhausted into the room.

Abstract: A combustion system includes a primary combustion chamber divided into left and right sides by fuel-retaining standards defining a canyon or void extending into a secondary combustion chamber is provided. The floor of the primary combustion chamber and the fuel-retaining standards direct the burning solid fuel toward the lower part of the canyon, while at the same time retaining the non-burning solid fuel on either side of the fuel-retaining standards. The combustion system further includes an air delivery system having a lower air tube supplying high and low velocity air and an upper air tube. The lower air tube is positioned proximate to a firebox floor, while the upper air tube is positioned within the secondary chamber. Automatic air setting mechanisms are provided so that proper air settings can be maintained during various phases of a fire.

Abstract: A bi-metal control flap for a wood stove is biased to close by gravity and is controlled to open an air inlet when the temperature rises which is opposite to the traditional bi-metal control systems which close when the temperature rises. The valve is a free pivoted L-shaped flap with a first portion and a second portion extending from a pivot position and supported by a casing. The first portion is positioned over an air supply inlet and retained over the inlet by gravity. A crank arm supported by the casing rotates to push against the second portion of the flap to open the flap a predetermined amount, and a bi-metal strip coil having an outer end attached to the casing and a floating inner end attached to the crank arm such that a change in temperature causes the crank to rotate to open the flap or allow the flap to close by gravity.

Abstract: This invention relates to a novel apparatus and method for automatically and dynamically regulating the intake of air into the combustion chamber of a heating unit such as a wood burning stove, furnace, or fireplace to ensure even and efficient burning of fuel. More particularly, this invention pertains to a method and apparatus that uses negative gas pressure in the heating unit's flue, and no additional temperature or pressure sensors, to automatically and dynamically control a damper regulating intake of air into the combustion chamber in inverse relation to changes in negative flue gas pressure. This method and apparatus are especially useful in combination with a heating unit having two combustion chambers, one chamber for combustion of solid fuel and a second chamber for further combustion of exhaust gases and other byproducts from combustion in the first chamber.

Abstract: A vented wood or gas-log fireplace is formed from a sheet metal member bent to form side and rear panels. A pair of spaced apart sheet metal plates are connected between the side panels and have rear edges spaced from the rear panel. The rear edges of the plates are bent to form lips extending in a direction toward the opposite plate. Bracket members are secured to the plates adjacent the side panels. A rear refractory member is positioned between the plates in engagement with the lips, and side refractory panels are positioned in abutment with a respective side sheet metal panel and held in place by the bracket members, the side ceramic panels abutting the rear ceramic panel at the sides thereof. A top panel is fastened to the top edges of the side panels above the top plate and a conduit extends through the top plate with the top panel to communicate the combustion chamber with an exhaust pipe or chimney.

Abstract: A combustion cage for pellet fuel is an inclined container having at least one wall surrounding a bottom and a support structure. The surrounding wall and bottom of the container have a plurality of holes throughout imparting a hole-to-surface ratio of at least 40% to the wall and bottom. The support structure supports the inclined container in a fixed, inclined position with reference to the horizontal.

Abstract: An oven having a ventilation system capable of providing reduced temperature, low moisture exhaust air is provided. The oven has an oven cavity defined by a partition having a through hole and enclosed by an oven door having an air inlet to accept incoming air and a separator located within the door to divide the incoming air into at least a first path and a second path. The oven has an air duct surrounding the partition having at least one inlet at the front of the oven below the door, at least one inlet at the back of the oven and an air outlet at the front of the oven above the door. Also, the oven has a ventilation system capable of providing reduced temperature exhaust air out the air outlet located at the front of the oven.

Abstract: An unvented gas-log fireplace is formed from a sheet metal member bent to form side and rear panels. A pair of spaced apart sheet metal plates are connected between the side panels and have rear edges spaced from the rear panel. The rear edges of the plates are bent to form lips extending in a direction toward the opposite plate. Bracket members are secured to the plates adjacent the side panels. A rear refractory member is positioned between the plates in engagement with the lips, and side refractory panels are positioned in abutment with a respective side sheet metal panel and held in place by the bracket members, the side ceramic panels abutting the rear ceramic panel at the sides thereof.

Abstract: A process and apparatus for combustion of a gaseous fuel in a fireplace in which a plurality of periodic vortices are created in the airflow pattern of the combustion air prior to its mixing with the gaseous fuel, thereby producing a more natural looking, flickering flame.