Abstract: A tertiary heat exchanger having three sets of adjacent ducting, two stacked within the third, all of which carrying heat exchange mediums so that the heat carried by one medium in any set of a ducting is efficiently transferred to the other two. Two of the three sets of ducting are tubing and this tubing is spirally coiled in a container within the third set of ducting. The two sets of tubing are in alternating layers and the fluid flow of the heat exchange mediums are in opposite directions in each adjacent layer of the tubing. Outlet channels are provided at various points along the helical path of a ducting so as to alter the effective length of a ducting.

Abstract: An energy efficient heating system for utilizing non-petroleum based fuels capable of obtained incremetalized burn rates and fully automated control whereupon the beneficial utilization of heat produced thereby is maximized and the waste of heat is significantly reduced. System especially adapted for heating living areas such as mobile homes and operating heat-needy appliances and functions located therein.

Abstract: A new and improved stove or furnace for efficient combustion of wood fuel including a vertical feed combustion chamber for receiving and supporting wood fuel in a vertical attitude or stack, a major upper portion of the combustion chamber column comprising a water jacket for coupling to a source of water or heat transfer fluid and for convection circulation of the fluid for confining the locus of wood fuel combustion to the bottom of the vertical gravity feed combustion chamber. A flue gas propagation delay channel extending from the laterally directed draft outlet affords delayed travel time in a high temperature environment to assure substantially complete combustion of the gaseous products of wood burning with forced air as an actively induced draft draws the fuel gas and air mixture laterally through the combustion and high temperature zone.

Abstract: An auxiliary heating system for providing energy to a furnace and a domestic hot water heater. A heat transfer fluid is contained within a storage tank and is automatically routed between a heat exchanger located in an auxiliary heater, such as a fireplace or a wood burning stove, and a furnace as typically employed in a home or the like. The furnace may be a forced air system or a hydronic boiler system. In response to the sensed condition of the fire within the auxiliary heater and the demands of the furnace control thermostat, the heat transfer fluid is automatically circulated through one of a plurality of flow circuits so that the available energy contained in the fluid is used in the most efficient manner. A preheat coil is immersed in the storage tank through which domestic water is passed prior to its being delivered into the water heater.

Abstract: A hot water distribution system for a dwelling or other building is designed to avoid the waste of water incident to letting the water run until hot water reaches an open hot water faucet or valve. Adjacent each hot water outlet valve there is a control unit having an inlet connected to a hot water supply line from the water heater, a supply outlet connected to the hot water faucet or valve and a return outlet connected by a return line to an inlet of the water heater. Between the inlet and the supply outlet of the control unit there is a normally closed valve which is thermostatically controlled so as to open only when water in the control unit is at or above a predetermined temperature. When a hot water faucet or valve is opened and water in the hot water supply line has cooled to a temperature below a predetermined value, the control valve remains closed and water in the hot water supply line is returned to the water heater by a circulating pump.

Abstract: A heating system for supplying utility water and a heating fluid for space heating purposes comprises a unit fired by a burner and having a recuperator traversed by the combustion gases and forming a first zone for heating the space-heating fluid and a second zone for heating the utility water. According to the invention, a heat exchanger is provided along the path of the utility water delivered from the second zone to a reserve tank and the heat exchanger is connected in a bypass across the feed and return lines of the heating fluid circulating path. A control responsive to the temperature in the tank regulates the flow through the bypass while a further temperature control responsive to the feed side temperature of the space-heating circulation path controls the fuel supplied to the burner and the rate of combustion gas flow through the heat exchanger.

Abstract: As an article of manufacture, a boiler for a heating system, a boiler-heating system combination, and a method for heating a heat-transfer medium such as water in a heating system; combustion gases are brought into heat-transfer contact with the heat-transfer medium over a large specific, heat-transfer surface; the heat-transfer medium flows convectionally in the opposite direction to the combustion gases and the gases are caused to flow downwardly and are thereby cooled to a temperature which is lower than the temperature at the outlet for the medium heated by the gases before the gases are discharged to atmosphere; the boiler is fired by oil and/or gas and the combustion chamber (16) is arranged immediately above one end of the smoke-pipes (22). The other end of the smoke-pipes (22) discharge into a collecting chamber (24) provided with an outlet (28) for the combustion gases. The collecting chamber (24) is provided with an outlet (34) for condensation from the combustion gases.

Abstract: A heating chamber is provided for receiving well effluent therein including oil, water and gas and a heated chamber is also provided for containing a heat exchange liquid to be heated. Liquid heat exchange coils are disposed in the chambers and are serially connected in a closed loop flow path with gas pressure operated pump structure operatively associated with the closed loop flow path for pumping liquid therethrough. Gas fired heating structure is operatively associated with the heated chamber for heating liquid therein and a gas outlet from the heating chamber comprises a source of well gas under pressure directed through supply structure supplying well gas to the pump and burner structures. The supply structure includes a gas flow line, in which the pump structure is serially disposed, extending from the gas source to the pump structure and thereafter to the burner structure.

Abstract: A water heating system for use with an incinerator. The incinerator includes a combustion chamber to burn waste material and a stack is connected to the combustion chamber to discharge the hot flue gases. Located within the stack is a heat exchanger. A water heating system is located within a building and includes a closed conduit having a pump to continuously circulate hot water through the conduit. A second conduit connects the first conduit with the heat exchanger in the stack and a second pump is employed to circulate water through the second conduit. In addition, a bypass is connected across the second conduit. A valving system is operable during periods when the incinerator is not operating to flow water through the first conduit and to separately flow water through the second conduit via the by-pass, so that water will continually flow through the heat exchanger.

Abstract: Dual flow circuitry is utilized to transport fluid held in a tank through a heating means by providing means for carrying both inflow and outflow streams and means for depositing the inflowing stream at a predetermined level in the tank while utilizing only one tank opening. The dual flow circuitry can be used to supplement an ordinary residential or other hot water heating system with a heat pump.

Abstract: A fluidized bed combustion system particularly suitable for use in a residential heating system comprising a fluidized bed combustor housing a combustion chamber wherein crushed fuel is burned to generate hot flue gas, a heat exchanger disposed outside of the combustor in the flow path of the flue gas, a particulate collector for removing fine particles entrained in the flue gas before the flue gas is vented to the atmosphere, and an induced draft fan for venting the flue gas to the atmosphere and drawing fluidizing air and recirculated flue gas through the combustion chamber. The combustor is uncooled and heavily insulated so as to provide a substantially adiabatic combustion chamber therein in order to minimize heat loss therefrom. Electric heating means are disposed within the fluidizing region of the combustion chamber to provide the capability of heating the slumped bed during shutdown to maintain bed temperature above the ignition point.

Abstract: A boiler for heating a heat-transfer medium, such as water in a domestic heating system with water-carried heat. The boiler comprises a tank (2) for the radiator water; a combustion chamber (3); combustion-gas pipes (4) which extend down through the tank and which discharge at the bottom thereof in a collecting chamber (5) for combustion gases. At the upper part of the tank (2) there is arranged an outlet (7) to the radiators, while a tank-inlet (8) from the radiators is arranged at the lower part of the tank. Also arranged in the tank (2) is a reservoir (17,20) for heating tap water, whereat the reservoir-inlet (10) for tap water is connected to a fresh cold-water pipe and is located at a level which lies beneath that of the tank inlet (8) from the radiators.

Abstract: A solid fuel burning hot water heater is described having a primary combustion chamber with a refractory material base portion which forms the locus of combustion. A water jacket defines an upright portion over the refractory base portion for receiving a charge of fuel in a generally vertical stack. The water jacket is coupled to a source of water for at least convection circulation and assists in confining the locus of solid fuel combustion to the base of the chamber. Heat exchange channels or pathways are defined around the outer periphery of the water jacket in heat exchange relationship with the water jacket for transfer of heat from the end products of combustion to the circulating water. A flue gas delay channel arrangement extends from the draft outlet at the base of the combustion chamber to the heat exchange pathways.

Abstract: A water tempering system for preheating water comprises a storage tank for tempered water; a water tempering unit containing S-shaped heat exchange tubes positioned in the exhaust flue of a furnace; first conduit means for conveying water from the storage tank to the tempering unit; and second conduit means for conveying water from the tempering unit to either the storage tank or an outlet tube for the water tempering system.

Abstract: A controller for a space heating system employs a room thermostat and a furnace thermostat responsive to the temperature of a room and a furnace, respectively, for firing the furnace. This controller has a power input terminal for receiving primary electrical power. The controller also has a timed switch and a switching means. The timed switch can connect and disconnect the power input terminal to the furnace. Disconnecting this terminal disables the furnace thermostat. The switching means responds to the room thermostat and can connect and disconnect the power input terminal to the furnace.

Abstract: An fuel-fired hot water furnace includes the use of an improved combustion chamber, heat exchanger and breaching damper, and further includes utilizing the water heated in the furnace as the means of heating a separate domestic supply of water directed through a side car hot water heater in fluid communication with the furnace. The improved combustion chamber includes a primary combustion cylinder which is orthogonally attached to a secondary combustion cylinder, and the secondary combustion cylinder is provided with a necked-down discharge so as to facilitate a thorough burning of a fuel and air mixture. The heat exchanger includes a primary rise and fall arrangement for the combustion gases so as to provide for maximum heating of the water within the heat exchanger prior to the gases being emitted outwardly from the furnace through a breaching tube, and the breaching damper is provided within the breaching tube so as to regulate the rate of combustion gas flow.

Abstract: A flue gas heat recovery system comprises an exhaust gas to air heat exchanger, a hot air to water heat exchanger, a fan, a circulating pump, and a control system which senses the temperature of the exiting air from the air heat exchanger and the temperature of the water leaving the water heat exchanger in combination with the thermostatic sensed temperature of the hot water heating system in order to operate the system in a desired manner. The system may also be used for space heating purposes. The control system in conjunction with the air heat exchanger provides a fail safe system which can be used with solid fueled stoves and fireplace inserts as well as furnaces and hot water boilers without danger of water overheating even during electrical power outages.

Abstract: An exterior wall of the firebox of a wood burning stove or the like fixedly supports in close heat exchanging relation therewith a plurality of aluminum fins comprising plates arranged in close side-by-side, substantially coplanar and parallel relation. A single continuous jointless tube of relatively stiff, heat conductive material is bent in a serpentine shape with elongate substantially parallel legs each fixed to the exterior face of a respective plate. The serpentine tube is in contact with said plates except where bent to extend from the end of one plate to the next. In a preferred embodiment, a cover is fixed with respect to and overlies the fins and serpentine portion of the tube, with the ends of the tube extending outward therefrom for connection through water lines to pump and valve apparatus associated with a tank of water to be heated.

Abstract: A flue gas heat recovery apparatus is employed with a system of appliances such as a gas furnace and hot water heater, each having separate exhaust gas flues. The apparatus includes a gas-to-liquid heat exchanger in thermal communication with the two flues to simultaneously extract heat therefrom and a liquid-to-gas heat exchanger disposed within the furnace cold air return duct. A pump circulates water between the exchangers in response to a control signal to employ the recovered heat to preheat the cold air entering the furnace through the cold air return duct. A hysteretic control circuit monitors exhaust gas temperature and provides for system operation between high and low gas temperature limits. In the preferred embodiment of the invention, a furnace blower override feature is employed to energize the blower during periods of pump operation.

Abstract: This invention relates to the conservation of energy in a domestic gas water heater by utilizing the hot exhaust gases in a gas water heater for the preheating of the incoming unheated water into the water heater.The exhaust gases from a domestic gas water heater carry wasted heat and the present invention provides a mean to reclaim part of the wasted heat for the preheating of the incoming unheated water during hot water usage periods. During non hot water usage periods the heat in the exhaust gases is not reclaimed to prevent overheating of the water and also to prevent the formation of water deposit in the preheating assembly or heat reclaimer. During the non hot water usage periods the heat produced in the water heater is normally needed only to maintain the desired water temperature of the stored water in the water tank of the water heater.Due to the rapid heating or recovery rate, the present invention enables the use of a smaller water heater.

Abstract: An integrated, microprocessor-based primary control system for a building heating system. The control system includes in one unit a microprocessor and associated circuitry for (1) establishing the high limit of heat exchanger operation, (2) establishing the low-limit of heat exchanger operation for systems having a summer/winter coil, (3) modulating heat exchanger temperature as a function of outdoor temperature, (4) detecting alarm conditions, providing audio-visual signals while locking out heat exchanger operation in response thereto, and (5) providing an override time period for domestic hot water production in systems having a summer/winter coil.

Abstract: A heating system including a hot water heater and an air duct distribution system employs a housing having a heat exchanger located within its interior in association with a blower. Water conduits lead between the heat exchanger and the hot water outlet and the cold water inlet of the water heater. Water is passed from the hot water outlet of the water heater to the heat exchanger through a water conduit and then returned to a second conduit which passes through a pump to the cold water inlet of the water heater. The pump forcibly moves the water through the above circuit. Heat is exchanged from hot water flowing through the heat exchanger to air which is passed through the heat exchanger by a blower. After being heated the air is forced into the air duct for distribution. The system can be augmented with a second heat exchanger placed in the flue of the water heater.

Abstract: An auxiliary boiler is provided for substantially reducing fuel consumption of a conventional forced-air heating system. A boiler tank substantially filled with water is connected by hot and cold water lines to a heat exchanger disposed within the cold air duct of the forced-air heating system. A firebox which extends into the boiler tank is adapted to receive combustible material such as wood for heating the water in the tank. A pump directs hot water from the tank through the hot water line to the heat exchanger whereby cool air moving through the cold air duct is preheated as it passes through the heat exchanger. Heating tubes in communication with water in the boiler tank may extend through the firebox for supporting logs therein. Additional heating tubes may extend through a flue directed upwardly from the firebox through the boiler tank.

Abstract: A thermally-integrated system combining a heat exchange unit including a tank containing unpressurized water with a compressor-type refrigerator in a manner whereby energy for heating cold water conducted through the unit in a pressurized cold water line is extracted from the refrigerator. In the system, an external line carrying the hot refrigerant and acting as an auxiliary condenser is extended from the compressor of the refrigerator to the main condenser thereof, the external line passing through the water tank of the heat exchange unit in heat exchange relationship with the water line both in the upper and lower region of the tank whereby heat is transferred to the cold water.

Abstract: A sheet metal inner fire box, has a grate, surrounded by refractory border in its bottom portion. Air, from an air intake port, in the front of the stove, passes upwardly through the grate and, thence, out of the discharge flue. An outer jacket houses the fire box and has walls which are spaced by baffles from the walls of the fire box to define an air plenum through which a blower directs the air to be heated. Water coils in the plenum are connected through a pump to the hot water heater.

Abstract: A heat recovery device for boilers with a blower-type burner. A heat exchanger is located in the stack gas stream and through which is passed a medium to be heated and comprises a pot-shaped vessel (2) which can be inserted into the stack gas duct and is closed on all sides. A stack gas inlet (4) leads into the upper zone of the vessel (2) and at least one stack gas outlet (6, or 30 or 31) leads out of the upper zone of the vessel (2) at a distance from the inlet. A substantially vertical partition wall (7; 21) is located in the vessel (2) and extends downwards from the cover (8) of the vessel (2) and ends at a distance from the bottom (9) of the vessel to interrupt the direct stack gas path from the inlet (4) to the outlet (6). Thus, a siphon-type stack gas path is formed with an inlet chamber (10; 26) and an outlet chamber (11; 27). A draft-interruption damper (15; 32) is fitted in the outer vessel wall in the zone of the outlet chamber (11; 27).

Abstract: An apparatus for producing hot water. A heat exchanger has a primary circuit which receives water from a hot water source and delivers the spent water back to the source. A secondary circuit through the heat exchanger receives unheated water and delivers it as hot tap water. A pump is connected in the line between the hot water source and the primary circuit of the heat exchanger, and a shunt bypass is connected in parallel with the series comprising the pump and the primary circuit of the heat exchanger. A sensing means such as a temperature sensing means senses the commencement of water flow through the secondary circuit and in response thereto operates the pump. Another temperature sensing means measures the temperature downstream from the primary circuit and in response thereto controls the distribution of fluid downstream from the primary circuit of the heat exchanger as between the shunt and the return line to the hot water source.

Abstract: A compact, self-contained highly efficient frictional air heating unit is provided which draws a flow of ambient air through an air inlet, frictionally heats the air, and discharges the air through an air outlet. The frictional air heating unit is utilized in a heating and cooling system for providing a source of heated air for heating, for powering an absorption type air conditioner system for cooling, and for heating water.

Abstract: A water heater apparatus is provided comprising a substantially vertical chamber having an upper end and lower end. A lower support plate is mounted inside the chamber near the lower end. A lower gas chamber is below the support plate and a water chamber above the support plate. An upper support plate is mounted inside the chamber near the upper end. An upper gas chamber is above the support plate and the water chamber is below the support plate. A plurality of substantially vertical tubes pass through the water chamber. Each tube is mounted to the upper and lower plate at the tube ends. The interior of each tube is in fluid communication with the respective gas chambers above and below the plates. A heat source is in the lower gas chamber for producing heated gases in the lower chamber. A water inlet means to the water chamber is provided for introducing water into the water chamber and a water outlet means for removing water from the water chamber.

Abstract: A system for producing hot water for a residential dwelling by recovering heat from the hot combustion gases in the flue and chimney of the dwelling's heating system. The system uses the usual hot water tank and furnace of the dwelling without any substantial modifications thereto. The hot water tank is located in an upper floor of the dwelling and is connected to the furnace which is located on a lower level by a first section of pipe which extends from adjacent the water heater to the furnace flue within the chimney. A cold water supply is connected to the first section of pipe by a second section of pipe which also extends through a portion of the chimney and the furnace flue to recover heat from the hot combustion gases passing therethrough. The heated water in the sections of pipe flows into the hot water tank through the usual cold water inlet line for subsequent discharge from the tank throughout the house.

Abstract: An instant hot water supply system comprising a connection between the hot water and cold water lines incorporating a thermostatic control so that as the water in the hot water line cools off, cold water is allowed to escape and hot water is drawn from the hot water supply to take its place.

Abstract: Apparatus and method for exchanging heat energy between a refrigeration circuit and a hot water system. Water is heated in a combination refrigerant desuperheater-water preheater and then conducted to hot water storage. A co-axial fitting is disclosed for mixing heated water from the refrigerant desuperheater-water preheater with water in a hot water tank prior to discharging that water to a hot water system.

Abstract: Apparatus and method for exchanging heat energy between a refrigeration circuit and a hot water system. A restricted flow by-pass line is used in conjunction with a pump continuously operated with the compressor of a refrigeration system such that a continual restricted flow of water by-passes the heat exchanger when temperature conditions are such that water is not flowing through the heat exchanger.

Abstract: A fireplace heating system having a fireplace furnace connected to a heat transfer device and to a fluid source for heating a fluid received from the source and feeding heated fluid to the heat transfer device in order to heat a building, and the like, in which the heat transfer device is located. The furnace coils forming a grate and arranged extending in a tortuous path in vertically displaced, substantially horizontal planes and a substantially vertical plane extending between the horizontal planes for partially surrounding a fire built on the coils in order to achieve efficient heat transfer between the fire and the fluid being passed through the coils.

Abstract: A fluid heating system specifically designed for the use of solid bulk fuel, such as wood or the like. The burner unit includes a continuous coil of fluid carrying conduit which acts both as a grate for supporting the fuels of combustion and as the primary implement for circulating fluids in close proximity to the combustion material so as to maximize the heat absorption by the fluid. Primary and secondary combustion air inlets combine with a baffling system that maximizes the efficiency of the combustion process within the heat transfer coil. Room heating and hot water storage apparatus are also disclosed as desirable end uses for the heated fluid.

Abstract: A vertical drum is disposed upon and connected to a combustion chamber through a heat transfer wall. A burner opens in the combustion chamber to face the heat transfer wall and an exhaust tube is connected to the combustion chamber on the lower wall adjacent its periphery and extends horizontally below the drum until it communicates with the atmosphere.

Abstract: This invention relates to self-priming devices for indirect domestic water heating systems which device acts as expansion and contraction chambers for primary and secondary water in the system. The device consists of a closed housing divided internally by a wall intermediate its ends to form axially disposed first and second chambers. A open ended tubular member extends from the wall into the second chamber to provide communication between the chambers and an inlet and outlet is provided in the second chamber adjacent the wall. At least one inlet is provided in the first chamber at the end remote from the wall. The first chamber is connected to a primary water circuit and the second chamber is connected to the secondary water circuit to separate the water in one circuit from the water in the other circuit. The volume of the first chamber is substantially 4 to 4.

Abstract: A hot water heater includes inner and outer tanks for holding water. The tanks are interconnected in such a manner that the cold water is received in the outer tank prior to flowing into the inner tank to be heated. Hot water is drawn from the inner tank for use. A heating element is located within the inner tank for heating the water within the inner tank. The cooler water in the outer tank surrounds the inner tank and thermally insulates the water in the inner tank from the outside environment. Any heat losses from the inner tank heat the cooler water in the outer tank, which is ultimately supplied to the inner tank for heating.Temperature sensors are provided within the inner tank and the outer tank, and a third temperature sensor senses ambient temperature of the room air outside of the outer tank. A fan directs ambient room air against the outerwall of the outer tank to provide heating of the water within the outer tank, which is cooler than ambient room temperature.

Abstract: A heat exchanger coil disposed in a furnace chamber or duct to absorb heat from the furnace to increase the temperature of water passing through said coil from a cold water source to a hot water heater or storage tank is disclosed. An additional feature includes a second heat exchanger coil disposed between the cold water source and the furnace heat exchanger within the confines of a building to absorb heat from the ambient surroundings. An insulated coiled storage unit disposed downstream of the furnace heat exchanger to provide a quantity of additional preheated water to the water heater and a spurge tank overheat and overpressure relief unit for the system is also disclosed.

Abstract: A space heater with a heat recovery system in which the exhaust gases from the hot air furnace are passed through a heat exchanger in which a set of water heating coils is disposed. The set of coils is connected to a hot water holding tank which is in turn connected to a bank of heat exchanger coils in the heated air outlet of the furnace. A damper is provided in the exhaust pipe of the furnace and a pipe connects the exhaust pipe on the anterior side of the damper with the heat exchanger, and a pipe connects the chamber with the exhaust pipe on the posterior side of the damper. A pump is provided for circulating the water between the first set of coils and the holding tank, and a fan forces the air form the exhaust pipe through the chamber in the heat exchanger. The pump and fan are controlled by a switch responsive to the operation of the furnace. The holding tank may be used to heat water supplied to a hot water heater of a hot water supply system.

Abstract: A heater apparatus adapted to be used as an auxiliary unit to the main heater system of a vehicle jointly heats the vehicle engine to operating temperature and heats the fuel line while the engine is inactive. The heater apparatus includes improvements for reducing heat dissipation, providing easy accessibility to the burner assembly, and for automatic ignition of the heating element. In addition, the heater operates directly from the vehicle fuel supply thereby eliminating the need for carrying any auxiliary fuel supply for the heater.

Abstract: A water heating and forced air heating system that provides potable hot water and that also provides heated air for heating enclosed spaces within buildings, including: a water heater including a water tank filled with water, a burner for heating the water in the tank, and an exhaust flue for removing hot gases generated by the burner; a gas-to-liquid heat exchange unit disposed within the flue; a forced air heater having a casing that defines a chamber, a liquid-to-gas heat exchange unit disposed within the chamber, a gas-to-gas heat exchange unit also disposed within the chamber, and a blower for pulling fresh air into the chamber and blowing it past the heat exchange units to absorb heat; a pump for pumping water through the gas-to-liquid heat exchange unit so that the water becomes heated by the hot gases within the flue; another pump for pumping heated water through the liquid-to-gas heat exchange unit to heat the air flowing within the chamber; and a conduit for connecting the terminal end of the flue t

Abstract: A very well heat insulated water storage or accumulator tank of relatively large capacity as compared to the capacity of the hot water heating unit is interposed between the unit and the radiator system and is interconnected with the unit. Heated water from the top portion of the tank is used to preheat the unit prior to actuation thereof, and mixed water above a given temperature is fed to the unit from the tank during actuation, such that the corrosive condensation on the heating surfaces of the heating unit, caused by heating a cold surface, is eliminated thereby extending the useful life of the unit. When the unit is actuated, heated water from the unit fills the tank from the top side until a volume of non-heated return water from the radiator system, approximately equal to the capacity of the unit, remains in the bottom of the tank.

Abstract: A package heat exchange system using an expanded surface gas-fired burner to supply heat via a heat exchange coil in a dome above the extended surface heat exchanger which heats domestic hot water and supplies heat via the dome to a radiator for heating a living area of a home. A control system provides for utilizing steam from the extended surface heat exchanger to heat the coil in the dome and maintains a first pressure for supplying the domestic hot water and a higher pressure when radiator heat is called for. The heat for domestic hot water may be further heat transferred in a fourth heat exchanger which adjusts the temperature of the domestic hot water. The heat supplied to the radiator may be self-pumping by utilizing steam and the heat to the radiator may be cut off by supplying a control to the return pipe of the radiator which allows the radiator to fill with condensate from the steam.

Abstract: A package heat exchange system using an expanded surface gas-fired burner to supply heat via a heat exchange coil in a dome above the extended surface heat exchanger which heats domestic hot water and supplies heat via the dome to a radiator for heating a living area of a home. A control system provides for utilizing steam from the extended surface heat exchanger to heat the coil in the dome and maintains a first pressure for supplying the domestic hot water and a higher pressure when radiator heat is called for. The heat for domestic hot water may be further heat transferred in a fourth heat exchanger which adjusts the temperature of the domestic hot water. The heat supplied to the radiator may be self-pumping by utilizing steam and the heat to the radiator may be cut off by supplying a control to the return pipe of the radiator which allows the radiator to fill with condensate from the steam.

Abstract: A very well heat insulated water storage or accumulator tank of relatively large capacity as compared to the capacity of the hot water heating unit is interposed between the unit and the radiator system and is interconnected with the unit. Heated water from the top portion of the tank is used to preheat the unit prior to actuation thereof, and mixed water above a given temperature is fed to the unit from the tank during actuation, such that the corrosive condensation on the heating surfaces of the heating unit, caused by heating a cold surface, is eliminated thereby extending the useful life of the unit. When the unit is actuated, heated water from the unit fills the tank from the top side until a volume of non-heated return water from the radiator system, approximately equal to the capacity of the unit, remains in the bottom of the tank.

Abstract: A package heat exchange system using an expanded surface gas-fired burner to supply heat via a heat exchange coil in a dome above the extended surface heat exchanger which heats domestic hot water and supplies heat via the dome to a radiator for heating a living area of a home. A control system provides for utilizing steam from the extended surface heat exchanger to heat the coil in the dome and maintains a first pressure for supplying the domestic hot water and a higher pressure when radiator heat is called for. The heat for domestic hot water may be further heat transferred in a fourth heat exchanger which adjusts the temperature of the domestic hot water. The heat supplied to the radiator may be self-pumping by utilizing steam and the heat to the radiator may be cut off by supplying a control to the return pipe of the radiator which allows the radiator to fill with condensate from the steam.

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: In the present invention, a plurality of containers provide for heat storage in water or other fluids, or solids, or both, plus domestic water heating. There is good quality heat exchange going in to storage and going out to points of use. Space heating may be accomplished by hot air, or by hot water or other liquid, or both.

Abstract: A heat transfer system for use in supplementing the operation of the heating/cooling system of a building and its hot water heating system includes a heat exchanger in the flue of the furnace as well as a heat exchanger in the fan chamber. A first liquid circulation loop couples the heat exchangers for transferring heat from the flue exchanger to the air moved through the fan chamber heat exchanger. A second liquid circulation loop includes the flue exchanger and the building hot water heater for supplementing the heating of water therein. In the summer months during the cooling mode of the systems operation, cold water employed, for example, for lawn sprinkling is passed through the fan chamber heat exchanger for cooling and dehumidifying air circulated in the building. A valve control system is employed to automatically control the flow path of fluid in the system as a function of detected temperatures.