Abstract: A heater comprising a ceramic heater element and at least two fins for dissipating heat from the ceramic heater element, wherein the ceramic heater element extends along a plane in one dimension and the at least two fins extend away from the plane, and wherein the at least two fins are connected to the ceramic heater element via discrete connecting portions.

Abstract: A heating device has a combustion chamber and a gas flue configured to guide hot exhaust gas generated in the combustion chamber, the flue having an inlet region and an outlet region and is configured connected to the combustion chamber via the inlet region. Heat transfer ribs having a wall thickness are arranged spaced from each other in the gas flue for the heat transfer from hot exhaust gas to the gas flue. The wall thickness of the heat transfer ribs and/or the distances of the heat transfer ribs to one another are optionally configured to be larger on the sides of the inlet region than on the sides of the outlet region.

Abstract: A heat exchanger is disclosed including an array of interlaced conduits. The conduit array includes a first plurality of conduits connected to a first inlet header at one end of the first plurality of conduits and to a first outlet header at an opposite end of the first plurality of conduits. This first plurality of conduits provides a first fluid flow path from the first inlet header through the first plurality of conduits to the first outlet header. The conduit array also includes a second plurality of conduits crossing and interlaced with the first plurality of conduits. First and second fluid flow paths are provided through the first and second pluralities of conduits, and a third fluid flow path is through open spaces between the crossed interlaced first and second pluralities of conduits.

Abstract: A stove includes a combustion chamber for producing heat, a thermoelectric device thermally coupled to a hot source and a cold source, a battery, a fan electrically connected to the thermoelectric device and the battery, and a controller configured to monitor the battery and thermoelectric device and configured to direct the fan be operated from power provided from the battery when power produced from the thermoelectric device is insufficient to power the fan. The stove can have an associated heating plate, and the walls of the combustion chamber can be configured to reflect heat onto the heating plate.

Abstract: A connecting structure of a blast furnace hot stove of the type in which a heat accumulation chamber dome and a combustion chamber dome are directly connected to each other through a dome connecting pipe which does not have any expansion joint. The ratio (RD/TD) of the diameter (RD) of the dome connecting pipe to the diameter (TD) of the heat accumulation chamber dome approximately meets the condition wherein 0.24.ltoreq.(RD/TD).ltoreq.0.60, while the ratio (RD/ND) of the diameter (RD) of the dome connecting pipe to the diameter (ND) of the combustion chamber dome approximately meets the condition wherein 0.44.ltoreq.(RD/ND).ltoreq.0.80. The connecting structure may have a reinforcement ring provided on straight barrel portions immediately under the heat accumulation chamber dome and the combustion chamber dome, and a connecting beam may be fixed at one end to one of the reinforcement rings and engage at its other end with the other of the reinforcement rings for limited sliding motion.

Abstract: A condensing mode furnace fired by a gun-type, power fluid fuel burner, such as an oil or gas burner, as a heat exchanger with a combustion chamber therein and communicating therewith. A duct carries the products of combustion from the heat exchanger to a thin and tube type condenser. An exhaust vent carries the products of combustion and condensate from the condenser, a drain line removing the condensate from the exhaust vent. A blower in the exhaust vent causes a flow of the products of combustion from the heat exchanger through the condenser and exhaust vent. An air passage surrounds the heat exchanger and condenser and a blower causes a flow of air serially over the condenser and heat exchanger to a hot air outlet. The furnace control initiates operation of the vent blower in response to a thermostat calling for heat in advance of operation of the burner thereby to purge on burned gases from the combustion chamber and heat exchanger.

Abstract: A forced air gas fired heating device may be utilized as a stove insert for a conventional open fireplace or in an alternative embodiment may be formed with a double walled construction for use as a free standing unit. In both embodiments a gas burner adjacent a bottom portion of the housing heats an air space within the housing. A room air inlet conduit traverses back and forth across the heated air space and communicates with an air distribution chamber in an upper portion of the housing. A plurality of room air outlet conduits extend outwardly from the distribution chamber through a front wall of the housing. A heat exchanger is suspended from each of the room air outlet conduits and includes a hollow body portion in fluid communication with the associated air outlet conduit. Each of the heat exchangers has an enclosed longitudinally extending corrugated heat conductive metal plate and terminates in a bottom heat conducted metal plate deposed adjacent the gas burner.

Abstract: This invention is a household stove for heating the household air; including a fire box surrounded by a jacket, through which the room air circulates, and a duct unit attached to a cold air intake side of the jacket, the duct unit including branches to collect cold air from distant areas of the room.

Abstract: A room heating apparatus for small spaces adapted to be fired with a gaseous or vaporized liquid fuel, especially for mobile homes, has a combustion gas channel with an upper horizontal cross channel serving as a heat exchanger. Outer fins (12, 20) project from the sidewalls (16) of the combustion gas channel. In order to increase the heat exchange from the upper cross channel (5) and avoid the overheating also under greater loads, the outer fins of the cross channel (5) are formed as large surface fins (20), which project essentially further in the right angle direction from the vertical sidewalls (16) of the cross channel (5) than the outer fins (12) arranged thereunder extend from their respective channel wall.