Abstract: An electronic equipment enclosure comprises a frame structure formed from a plurality of support posts and at least partially enclosed by a plurality of panels. The panels include at least side, top and back panels defining an enclosure having a top, a bottom and a rear thereof. The top panel includes an opening there through that is rectangular in shape. The equipment enclosure further comprises an exhaust air duct extending upward from the top panel of the enclosure. The exhaust air duct is rectangular in cross-section and is disposed in surrounding relation to, and in fluid communication with, the top panel opening. The exhaust air duct is adapted to segregate hot air being exhausted from the enclosure from cool air entering the enclosure, thereby improving thermal management of the enclosure.

Abstract: Building environmental control systems are disclosed which comprise one or more prefabricated temperature sensing and control panels in operable communication with a system control unit, an air handling system, and a heating and/or cooling utility supply system. The panels are configured to constitute a portion of the sheathing of a building or an internal partition. According to some embodiments, the panels include an outer wall and an inner wall defining an inner space therebetween in which is situated a heat exchanger and a temperature sensor. Each panel comprises an inlet to admit an air stream into its inner space and an outlet for discharging the air stream into a space adjacent to the inner wall after having been thermally conditioned by the heat exchanger.

Abstract: Enclosure assemblies for managing air flow. Such assemblies include an enclosure and at least one inclined pathway in contact with the enclosure, each pathway including a pair of side wall portions and a top wall portion that collectively extend between spaced apart openings to define an air mass. One opening having a lower boundary and the other opening having an upper boundary, with the lower boundary being at an elevation higher than that of the upper boundary, such that when a temperature differential exists within a given pathway, warmer air will be trapped in an upper portion of the air mass and above the upper boundary, thereby impeding air flow from the enclosure.

Abstract: A heating unit can reduce the rate of power consumption for heating a vehicle, so that the running distance of the vehicle is increased and hence the battery charging cycle of the vehicle is prolonged. A heating unit of a vehicle heating system includes a casing made of a metal material capable of electromagnetically shielding microwaves, a support arranged in the hollow section of the casing, a plurality of microwave absorbing/heat emitting members arranged at the support and a microwave outputting unit arranged in the casing to output microwaves toward respective microwave absorbing/heat emitting members, blown air being heated by heat generated as a result of absorption of microwaves by the microwave absorbing/heat emitting members at the time for blown air to flow from the upstream side to the downstream side in the hollow sections of the microwave absorbing/heat emitting members.

Abstract: A gas heat sub-base for use in conjunction with a PTAC or similar HVAC terminal unit, the sub-base having a housing with a front side, back side, top and bottom all defining an interior space. The top is configured to mate with the bottom of the PTAC unit. The sub-base also includes a plurality of air intake louvers on the front side of the housing and a heat exchanger located within the interior space of the housing. The gas heat sub-base is separate from, but is integrated with, the PTAC unit. A heating and cooling unit includes a PTAC unit with the gas heat sub-base.

Abstract: This invention relates to a mixing device for an aircraft air conditioning system with a supply conduit for fresh air from the air conditioning system, with a second supply conduit for recirculated air from a pressurized region of the aircraft, and with a discharge conduit for supplying mixed air into the pressurized region of the aircraft, wherein a non-return valve is integrated in the mixer.

Abstract: A hydronic air heater includes a frame assembly defining an enclosure, an inlet air damper formed in a wall of the enclosure and providing a means of ingress for ambient air, a closed heat transfer loop disposed within the enclosure, and a blower assembly disposed within the enclosure. The heat transfer loop includes a boiler for heating a fluid, a pump for circulating the fluid within the loop and a heating coil for receiving the heated fluid from the boiler. The blower assembly is configured to draw air into the enclosure through the inlet air damper and through the heating coil whereby heat from the fluid within the heating coil is transferred to the air.

Abstract: A method for efficient control of a heater ventilation fan. The method includes switching the heater ventilation fan from low speed to high speed after a brief period P1 following starting, and continuing heater ventilation fan operation for a variable period of time P2 after the heat source has stopped. The period P1 is preferably about four minutes, and the period P2 is determined by the duration of heating and is generally between two and four minutes. Operating the heater ventilation fan at high speed improves heat transfer and efficiency while the heating system is operating, increases warm air movement to the space, satisfies the thermostat set point temperature in less time, reduces heating system operation, and reduces energy use. Continuing heater ventilation fan operation after turn-off maximizes recovery of additional heat from the heat exchanger to improve overall efficiency, extend the off cycle time, and save energy.

Abstract: The present invention relates to a method in a cabinet and a cabinet for controlling the temperature inside the cabinet. The cabinet is comprised in a radio network node. The cabinet comprises a first set of electronic equipment and a second set of electronic equipment, a first climate system and a second climate system. The first and second climate systems are arranged to transfer heat from an internal volume to an external volume of the cabinet. A first air flow is generated using a first air moving device of the first climate system, which first air flow substantially affects the first set of electronic equipment. A second air flow is generated using a second air moving device of the second climate system, which second air flow substantially affects the second set of electronic equipment. A temperature is measured within the internal volume by using a temperature sensor.

Abstract: There is provided a heating system for a building comprising; i) a heater; ii) a media flow passage through which a medium heated by the heater passes in order to distribute heat through the building; and iii) a heat recovery apparatus for recovering latent heat of adsorption from a humid gas. The heat recovery apparatus comprises a) a gas flow passage connected at one end to a source of humid gas; b) a desiccant material provided within the gas flow passage such that the humid gas contacts the desiccant material and water vapour is adsorbed releasing latent heat of adsorption; wherein the media flow passage and gas flow passage are in heat exchanging relationship, such that when the desiccant material adsorbs water vapour from the exhaust gas the latent of the adsorption is at least partially transmitted to the medium.

Abstract: A heating system, a method of operating a heating system and a controller for a heating system are disclosed herein. In one embodiment, the controller includes: (1) a system interface configured to receive thermostat calls from a thermostat, the thermostat calls including a heat pump thermostat call and an electrical heating elements thermostat call and (2) a processor coupled to the system interface and configured to select a starting heat load for the heating system based on the thermostat calls and a selected target discharge air temperature for the heating system.

Abstract: Disclosed is a heating system utilizing electrolysis of water for heating a space. The system includes a tank configured to hold water, a separation cell configured to perform electrolysis of water, a first heat exchanger, a gas bubbler, a burn unit, and a second heat exchanger, where water from the tank is delivered to the separation cell where electrolysis is performed. The fluid produced from the electrolysis is delivered through the first heat exchanger back to the tank, then to the gas bubbler, and finally to the burn unit, where the hydrogen gas produced during electrolysis is burned to emit heat directed at the second heat exchanger. Through the process environment air is heated.

Abstract: A heating system for heating an interior room may include a radiator member for generating heat, a wall member being positioned in a space relationship to the radiator member and a panel member being positioned between the radiator member and the wall member. The panel member may include an attachment member to attach the panel member to the wall member, and the panel member may include an inclined surface. The panel member may include a horizontal surface, and the panel member may include an inclined surface and a horizontal surface. The inclined surface may extend to an edge of the horizontal surface, and the panel member may include a substantially flat back surface. The attachment member may be a layer of adhesive, and the attachment member may substantially cover a back surface of the panel member. The attachment member may only cover a portion of the back surface of the panel member. The panel member may encapsulate air for insulation.

Abstract: An integrated air flow induction system for heating a building is provided, the system comprising a centrally located fireplace hearth assembly and wall and floor beam sections defining hollow channels therethrough. The hollow channels are configured to return air back to the fireplace. The fireplace comprises a fire box, the fire box configured to retain a fire therein and further configured to receive returned air from the hollow channels, such that the returned air is heated. A plenum, located below the fire box, is configured to receive the returned air from the hollow channels. A fan, located between the fire box and the plenum, is configured to direct the returned air received by the plenum through the fire box, such that the air is heated by the fire box and dispersed throughout the building.

Abstract: A direct gas-fired burner assembly is disclosed in which a two-stage flame is produced. A gas manifold is attached to two baffles with apertures disposed therein. The apertures are designed such that a fuel rich zone occurs near the manifold, while a lean zone occurs away from the manifold. At high fire, the apertures create a negative pressure zone which draws the gas away from the burner thereby allowing a primary flame to burn. The primary flame in the fuel rich zone ignites a secondary flame in the lean zone. Because a flame is burning throughout the entire combustion zone, the flame does not move out past the baffles, the flame remains smaller and cooler, and a lower output of pollutants is achieved.

Abstract: Provided are exemplary embodiments, which may include a heating system with one or more heat exchangers. The heat exchangers may be capable of transferring heat in, to, and/or from the heating system to reduce inefficiencies, and/or allow the heating system to operate in a relatively more efficient manner.

Abstract: The invention relates to an air heater (12) to be integrated into an air-carrying housing of a motor vehicle. The invention is characterized in that a flange plate (48) seals at least one exhaust gas discharge (54) from the vehicle interior by means of scaling elements between a fitting site for the air heater (12) and the flange plate (48) and between the air heater (12) and the flange plate (48).

Abstract: The invention concerns a supply air terminal device (10) and a method for regulating the airflow rate. The supply air terminal device (10) comprises a heat exchanger (11), with which a circulated airflow (L2) conducted from a room can be either cooled or heated. The supply air terminal device (10) comprises a mixing chamber (12), into which mixing chamber (12) the air chamber's (15) nozzles (16a1, 16a2 . . . 16an) or a flow gap (16) open to conduct a primary airflow (L1) into the mixing chamber (12), whereby the primary airflow (L1) from the nozzles (16a1, 16a2 . . . 16an) or through the flow gap (16) as a flow (Qs) will induce a circulated airflow (L2) from the room (H) to flow through the heat exchanger (11) into the mixing chamber (12). The combined airflow (L1+L2) is conducted into the room (H). The supply air terminal device (10) comprises a regulator (100) bypassing the nozzles (16a1, 16a2 . . .

Abstract: A portable air circulator is disclosed which rests on top of a radiator having a plurality of fins that are filled with a heated fluid. The air circulator has a casing and a fan. The casing includes a tray member which rests on top of the radiator fins and has a vent section with an opening facing the fins. A cap member of the casing forms a chamber with the tray member leading to the fan. The vanes of the fan direct a current of air from the cap member's vent portion through the vent section in the tray member at the radiator fins.

Abstract: The need to maintain the quality of air in a home has become more of a problem in new high efficiency tight houses so that governmental regulations are being proposed for a minimum change of fresh air. If too much cold outside fresh air is introduced into such homes at a single source, the room with the fresh air is usually too cold and/or unbalanced. The present invention avoids cooling any one room while maintaining heat efficiency. When the home has a gas fireplace, the exhaust gases are preferably directed through an air-to-air cross flow heat exchanger which preheats the quality air passing into a forced air furnace system. In modified embodiments of the present invention, make-up quality air is mixed with the room air and heated in the heat exchanger of the fireplace. The preheated room air from the fireplace is preferably connected to the supply/return of a forced air furnace system and distributed to all rooms to provide uniform heating.

Abstract: A heat exchange system and method for heating outside air provided to a structure are disclosed. The system uses and recovers heat from waste products that are being exhausted from the structure. A heated products source generates heated waste products as a result of combustion. An exhaust duct passes the heated waste products through a heat exchanger before exhaustion from the structure. An intake duct that supplies fresh outside air to the structure also passes through the heat exchanger. The heat exchanger couples the exhaust duct and the intake duct and transfers otherwise unused heat from the waste products to the outside air to increase the overall efficiency of the heated product source.

Abstract: The need to maintain the quality of air in a home has become more of a problem in new high efficiency tight houses so that governmental regulations are being proposed for a minimum change of fresh air. If too much cold outside fresh air is introduced into such homes at a single source, the room with the fresh air is usually too cold and/or unbalanced. The present invention avoids cooling any one room while maintaining heat efficiency. When the home has a gas fireplace, the exhaust gases are preferably directed through an air-to-air cross flow heat exchanger which preheats the quality air passing into a forced air furnace system. In modified embodiments of the present invention, make-up quality air is mixed with the room air and heated in the heat exchanger of the fireplace. The preheated room air from the fireplace is preferably connected to the supply/return of a forced air furnace system and distributed to all rooms to provide uniform heating.

Abstract: A heat producing system for a building including a cylindrical housing having a closed upper end, a closed lower end, a cylindrical side wall therebetween, and a hollow interior. The closed upper end has an opening therethrough exposing the hollow interior. A piping system is disposed within the hollow interior of the cylindrical housing. The piping system includes a series of air inlets extending outwardly of the cylindrical housing adjacent to the closed lower end thereof. The piping system includes a single outlet pipe extending outwardly of the cylindrical housing adjacent to the closed upper end thereof. The single outlet pipe is coupled with a heating duct system of a building. A quantity of vegetable matter is positioned within the hollow interior of the cylindrical housing.

Abstract: The present invention relates to a combined furnace and air recovery system. The system is comprised of a furnace housing having an inlet opening for connection to a cold air return duct and an outlet opening connected to a heating duct. A negative pressure compartment is located within the housing and is in communication with the inlet opening. A positive pressure compartment is also located within the housing and is in communication with the outlet opening. A fan is provided, communicating between the negative pressure compartment and the positive pressure compartment. a heating unit is located within the positive pressure compartment.

Abstract: An unvented gas-fired heater assembly including a base having a gas burner mounted thereon in a combustion area. Gas logs are disposed in the combustion area for heating by the gas burner. A duct assembly is provided which directs heated air from the heater assembly, and the duct assembly is height adjustable to change the height at which air is discharged from the unit. All of the components of the heater are assembled as a unit so that the unit is easily insertable and mountable in an enclosure sure as a fireplace.

Abstract: Provided is a hot-air type heater including a heat generating means such as a burner heater from which hot air is produced and blown out the heater into a living room so as to warm up the inside of the room with a uniform temperature distribution even among various heating rate conditions. The hot-air heater includes at least of variable angle louvers which are vertically swingable, and a control means for swinging the louver in association with at least either a hot air flow rate at a hot air outlet opening of the heater or the heating value of the heat generating means, so that the louver is vertically swung in accordance with an output from the control means in order to minimize differences in temperature distribution in the room during operation of the heater under various heating conditions.

Abstract: The present invention is a direct fired unit heater which includes a lower combustion chamber which communicates with an upper fan assembly which mixes combustion products with ambient air and discharges this laterally from the unit. The fan assembly has two cylindrical fans each with different critical speeds. One motor drives both cylindrical fans and is adjustable so that at a first higher speed it is within the operating range of both fans. At a lower operating speed, it is only within the operating range of the upper cylindrical fan. The upper cylindrical fan acts to pull in room air and discharge this. Thus, the blower operates continuously thereby destratifying the room air. When the burner operates, the motor speed is increased to act within the operating speed of the lower fan assembly. This lower fan assembly thereby pulls in the combustion products and discharges these along with the ambient air. The size of the cylindrical fans are designed to provide appropriate mixing for a direct fired unit.

Abstract: A paint spray and bake booth has an air heating and circulating system with two blowers and a combination of dampers and ducts which provide different air circulating circuits for the spraying and baking steps. A gas fired furnace with heat exchanging system adds heat directly to the air circulated through the booth to bake paint on a vehicle in it. The heat exchanging system also includes reclamation coils for heat transfer from the circulating air to water in the coils and which is piped to a storage tank for storage of heat over a prolonged period. The storage tank supplies the water through pipes to space heating units in the building in which the paint booth is located. Water is returned from the space heating units to the paint booth heat exchanging system.

Abstract: A gas fire space heater which can be an insert for an existing fireplace or a free standing unit is described. The device consists of a gas burner with radiants disposed within a housing. The products of combustion are collected in a first plenum, directed through a concertina heat exchanger into a second plenum, and from the second plenum up a flue. Air to be heated is collected by a blower and circulated countercurrently to the products of combustion through the heat exchanger, around the housing, and into the space to be heated. Air to be heated is supplied to the blower from an outside vent, and an inside vent. The outside vent is controlled by a one-way suction damper and the inside vent is controlled by a manual damper. The two vents form a T at the fan inlet and control of the manual damper then controls the amount outside and inside air supplied to the blower.

Abstract: The invention relates to heating apparatus for heating confined spaces, and particularly for heating passenger compartments in automotive vehicles and the like. The heating apparatus comprises a combustion device having means for supplying and mixing fuel and combustion air, and an outlet for combustion gases, and further comprises a heat exchanger which is connected to the outlet of the combustion device and which is intended for heat exchange between the combustion gases and a heating medium delivered to the space to be heated. According to the invention the combustion device incorporates a catalytic reactor for catalytic combustion of at least part of the fuel-air mixture, and a thermal reactor which is located between the catalytic reactor and the combustion gas outlet and which is intended for final combustion of the fuel-air mixture at least partially combusted in the catalytic reactor.

Abstract: A device for the redistribution of warm air within a building is provided. A device comprises a warm air collecting means which effectively collects warm air to be redistributed throughout the building and which can be disabled in an asthetically pleasing manner.

Abstract: In a far-infrared radiating system, a plurality of radiating units for allowing the combustion gas to pass therethrough are connected in series to form a multi-stage series-connecting construction. The combustion gas releases its heat energy in the form of far-infrared rays when passing through each of the radiating units. The combustion gas having passed through the radiating unit decreases in temperature, and recovers its previous high temperature through combustion of a fuel which is mixed with such combustion gas before the combustion gas enters the following-stage radiating unit. Such combustion is repeated in each of the following stages so that the heat produced by combustion of the fuel is effectively radiated in the form of the far-infrared rays without making waste.

Abstract: A fan apparatus for heating and circulating a large volume of relatively low temperature air in a room space includes a circular base plate (1), a centrally mounted motor driven fan (3), (4), and an annular heating coil (2) upstanding from the base plate in the flow path of radially outwardly air currents generated by the fan and deflected by the plate.

Abstract: A body, such as a building to be heated or cooled, is surrounded by a wall structure forming two hollow spaces arranged in parallel to each other. An outer hollow space is connected to the atmosphere so that outside air can flow into the outer hollow space. A separation wall between the outer hollow and an inner hollow space has leakage paths for air to pass from the outer into the inner hollow space which is kept at a reduced pressure relative to the atmosphere to enhance an inward air flow through the leakage paths. Thus, heat passing outwardly through the wall structure heats or cools the air being evacuated from the inner hollow space, depending on the temperature gradient across the wall structure. The evacuated air passes through a heat recovery system which may be connected to a heating system of the building or to a heat storage or to the atmosphere.

Abstract: An improved heating system is disclosed for providing heated air to a heated space, preferably using a gaseous fuel as the energy source. The system preferably includes an air heating sub-system, a compact combustion chamber, a separate cold air supply sub-system for conveying cold air from the heated space to the air heating sub-system, a combustion chamber heat exchanger in fluid with the cold air supply sub-system for transferring heat thereto, and a separate air circulating sub-system for withdrawing cold circulating air from the heated space. A mixing chamber is provided for mixing heated air from the air heating sub-system with the cold circulating air to provide heated air to the space. The system also preferably includes separate sub-systems for supplying pressurized combustion air and pressurized gaseous fuel to the air heating sub-system and for forcibly conveying exhaust gases therefrom without the need for a draft-type chimney or stack.

Abstract: A system is disclosed for recovering heat from high temperature combustion gases escaping from a heater such as for examples a domestic warm air furnace, boiler or the like. The system includes a first conduit leading to a chimney and a second conduit leading to a heat recovery unit which in turn is connected to a vent. A "T" connection interconnects the first and second conduits to each other and to the heater. The heat recovery unit artificially induces a draft in the second conduit which overcomes the natural draft induced in the first conduit by virtue of its connection to the chimney. An accelerator in the T connection increases the velocity of combustion gases flowing past the first conduit into the second conduit.

Abstract: The energy requirements of a sock finishing factory consisting at least of a dye house, boarding room and a warehouse are greatly reduced and the working conditions of employees are improved by utilizing waste heat from the boarding room to provide heat for the dye house water requirements and seasonal heat for the warehouse and by supply some of the heat for the dye house water from the air conditioning condenser system.

Abstract: Disclosed is a dwelling furnace having at least one clam-shell type primary heat exchanger in parallel orientation with a secondary heat exchanger, both the primary and secondary heat exchangers being vertically oriented relative to a furnace housing and parallel to the flow of air to be heated. The primary heat exchanger has a combustion chamber in the lower end thereof, and the lower end of the secondary heat exchanger exhausts into a tertiary heat exchanger oriented approximately perpendicular to the primary and secondary heat exchangers and horizontally relative to the housing, below the combustion chambers of the primary heat exchangers and below the exhaust outlet of the secondary heat exchanger. The tertiary heat exchanger includes a plurality of condensation tubes for retrieving the latent heat of condensation of the combustion gases.

Abstract: A fresh air device is provided for a mobile home or other dwelling which has an attic and a furnace with an air blower for supplying conditioned air to the dwelling. The fresh air device includes a fresh air blower for supplying fresh, outside air to an air box within the attic, and an air dividing partition within the air box for diverting a first portion of the outside air to the attic and a second portion of the outside air to a duct, the duct being connected to the furnace.

Abstract: A heating installation for local use is disclosed which is to be operated by aggregate fuel having both direct and indirect thermal emission, with a reactor receiving the combustion chamber, and a waste-heat flue above the reactor as well as an outer heat accumulator case, wherein a waste-heat flue is disposed in the space above the reactor and which flue is essentially developed by having a helical elevation between an outer heat accumulator case and an inner heat accumulator case, while air channels are formed opening into the inner space of the air space to be heated between the reactor case which is made of metal encircling directly the reactor case and the outer heat accumulator case which is connected with at least one, adherent part of the combustion chamber, while it is also connected with the air space to be heated, wherein both the outer and inner heat accumulator cases are of hollow walls, and are fitted together from ring-shaped ceramic modular elements, wherein the modular elements have section-s

Abstract: Combustion and heating equipment includes a body with an underfeed stoker located in the lower part thereof. A jacket surrounds the body to define a heating space, different parts of which are interconnected by triangular ducts disposed in the gas pass. A screwfeeder is provided for the retort of the stoker and extends right through the body terminating in an inlet 36. A mobile hopper has an outlet for registry with the inlet and is refillable and interchangeable.

Abstract: An air conditioning system for a poultry house. Plenum structure extends substantially the entire length of the poultry house. A forced-air heating unit is coupled to the plenum structure by flexible conduit. The heated air is controlled by slidable adjustment structure to provide substantially even heat along the entire length of the plenum structure.

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 heat dispersing thermal barrier, adapted for installation in close proximity to a free-standing heating device, comprising a vertically disposed, heat resistant room confronting wall panel, adapted to be spaced apart from the room wall by extensions to form a plurality of vertically aligned fluid passages between the extensions, the room confronting panel, and the wall confronting side of the thermal barrier. The fluid passages extend from near the ceiling to near the floor, with one end of the fluid passages in fluid communication with a chamber, wherein a blower is adapted to be in fluid communication with the chamber and the room air, and positioned to draw room air from near the ceiling, downwardly through the fluid passages to exhaust the air into the room near the floor. The blower may be thermostatically controlled. The chamber may be adapted to extend to provide thermal protection to the room floor and/or ceiling in proximity to the free-standing heating device.

Abstract: An economizer is provided for building heating systems and the like, of the type having a forced air furnace with adjacent combustion and heat exchange chambers, and a hot water reservoir or heater. The economizer comprises lower and upper heat transfer coils shaped for positioning adjacent the combustion and heat exchange chambers respectively of the furnace. An insulated standpipe interconnects the two coils, and the outlet of the upper coil is communicated with the inlet of the water heater. During use, water flowing through the economizer is heated in the lower coil and flowed to the upper coil to transfer additional heat to the air flowing through the heat exchange chamber, and simultaneously preheat water fed into the water heater.

Abstract: An energy saving heat recycling system for circulating hot air from the upper portion of a building, near the roof, to the lower portion of the building, near the floor level, to reuse the hot air to heat the lower portion of the building, such system comprising a generally cylindrical supporting sleeve, an electric fan including a fan motor mounted within the sleeve and a fan rotor to be rotated by the motor within the sleeve, means for mounting the sleeve in the upper portion of the building whereby the electric fan is to draw hot air into the intake end of the sleeve while discharging the hot air from the discharge end of the sleeve, and a flexible tubular duct connected to the discharge end of the sleeve for conveying the hot air to the lower portion of the building near the floor level, the duct being in the form of a tube made of thin flexible material which is compactly foldable for storage and shipment and is readily capable of being bent around obstructions and threaded through openings in the buildi

Abstract: An air filtering unit for blowing only filtered air into a room of a building having a central air conditioning air duct outlet therein, includes an electric blower unit having an air inlet and an air outlet. An air guide system conducts all air flowing through the duct outlet into the air inlet of the blower unit. A filter disposed between the air duct outlet and the air inlet of the blower unit filters all air flowing into the blower unit. Air flowing through the outlet of the blower unit is directed into the room in which the air filtering unit is installed or is directed by means of a tubular conduit back through the central air conditioning duct to an outlet duct into another room. The air filtering unit is mounted in a housing disposed over the air duct outlet and has a door which can be opened to expose the filter to facilitate removal and replacement of the filter.

Abstract: This heat reclaiming system consists primarily of an insulated duct with an inlet grille in the ceiling of a room, in which is a heating source. It further includes a blower, intermediate with a second duct, which is secured to an outlet duct in an adjacent room, so as to transfer the heat, at the ceiling of the room with the heating source, to the adjacent room.

Abstract: A waste heat recovery device particularly usable for heating the air traveling through a cold air return duct to a hot air gas heating furnace which includes an exhaust box securable to the wall of the furnace and adapted to receive exhaust gases therein to gather heat in the plenum chamber defined by the exhaust box, the exhaust box also including an exhaust gas outlet to expel gases to the existing heater stack or flue for venting, the plenum chamber including an exhaust coil being in fluid flow communication through a conduit to a return coil which is located within the cold air return, the conduit means being partially filled with a thermal transfer fluid such as water which will boil within the conduit in the exhaust coil means and will condense within the conduit in the return coil means and as such will effect rapid thermal transfer from the heated exhaust waste to the incoming cold air traveling through the cold air return and thereby achieve waste heat recovery.

Abstract: A heat exchanger with a tubular body having helical ribs about its periphery constituting expanded interior and exterior conductive heating surfaces. A clamp is captively held to the tubular body for mounting the heat exchanger to the exhaust duct of a freestanding heating unit. Hot gases passing through the exhaust duct conductively heat is the expanded surface of the tubular body and air therein. A thermostatically controlled blower directs the heated air within the tubular body towards a heated surface of the freestanding heating unit for convectively heating the area about the unit.