Matches 1 - 50 out of 166 1 2 3 4 >
Match Document Document Title
7575178 Heat recovery apparatus  
An apparatus for extracting heat from a heat source comprising a housing having a first end with a first opening and a second end with a second opening. The housing includes an internal compartment...
6908039 Heat exchange system  
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...
6749014 External flue heat exchangers  
A heat exchanger is mounted external to a section of flue pipe or is an integral part of a section of flue pipe. The heat exchanger preheats a domestic hot water supply and boosts the return water...
6729551 Fireplace make-up air heat exchange system  
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...
6598599 Hot air space heater  
An object of the present invention is to provide a hot air space heater that is capable of blowing hot air out of a whole wide hot air outlet provided at a front plate of a frame of the heater...
6572370 Heat regulating unit  
A forced air heating system has a heat regulating unit assembled therewith, the heating system comprising a furnace having fuel burner and a flue pipe for outlet gases. The heat regulating unit has...
6367703 Heat recovery system  
A heating system for a building that includes a furnace having a water jacket surrounding a burner unit. Heated water is circulated from the water jacket to a heat exchange system in the building...
6014966 Heat transfer unit for a furnace exhaust vent  
A heat exchange device for harnessing heat from an exhaust vent is provided including a furnace having a main inlet for receiving cooled air suctioned from a living area, a heating mechanism for...
5423374 Heat exchanger for flue gas  
An improved heat exchanger containing a hollow cylindrical pipe casing having a plurality of apertures formed on the surface. A lower elbow pipe is secured to a stove outlet pipe and to the hollow...
5406934 Heat recovery apparatus for use with a non-high efficiency furnace  
A heat recovery apparatus for increasing the efficiency of a furnace having a cold air return, a burner, a hot air outlet, and a hot air exhaust. The heat recovery apparatus comprising a finned...
5385299 Fresh air intake system for a dwelling having central forced warm air heating  
In a dwelling having a forced warm air type central heating system in which the source of heat is the hot gas products of combustion in a furnace, ambient fresh air is introduced into the dwelling...
5305954 Heating systems  
A heating system comprises an oven located above a solid fuel stove, a chimney for receiving combustion gases from the solid fuel stove, and a heat exchanger in the chimney for transferring heat...
5267552 Direct vent gas fireplace  
A direct vent gas fireplace has a firebox surrounded by an enclosure. The enclosure has an inclined surface between the top, rear and sides. The surface is inclined at approximately 45 degrees and...
5224650 Fireplace furnace heating system  
A fireplace furnace heating system for a structure having a firebox for combustion of fuel, preferably coal. A heating unit is disposed proximately to, and preferably surrounds the firebox....
5046481 Heating apparatus  
Heating apparatus for heating an environment comprises one or more heat exchange conduits (A, B, C, D, E, F, 6, 8) located in the flow path of primary heated fluid (F1-F2), and a device (4) for...
4938172 Supplement system for transferring heat from a furnace exhaust stack to a hot water tank  
A supplementary hot water heating system which transfers to a hot water tank heat from exhaust gas in the furnace stack which would otherwise be wasted. When the water in the supplementary heater...
4928667 Gas fire heating unit  
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...
4903615 Atmospheric gas heating unit with external recycling of exhaust gas to reduce nO.sub.x  
An improved burner head for a forced air furnace is disclosed which includes a burner tube fitted with gas nozzles, air flow openings, and a flame tube. At least one radial opening is provided...
4892045 Condensate drain system  
A condensate drain system for a furnace incorporates a collector and blower housing assembly mounted above a secondary condensing heat exchanger with condensate ports between the blower housing and...
4887586 Heat recovery apparatus  
Apparatus utilizing waste heat from a furnace or the like to heat water for any desired purpose or to supplement a conventional heating system. In its illustrative embodiment, the invention...
4884556 Zero clearance fireplace  
A prefabricated zero clearance fireplace includes a combustion chamber having a front opening, a glass door sized and shaped for positioning over and sealing the opening and a guide system for...
4854381 Heat exchanger device  
A unique heat exchanger device which is mounted in the flue of a forced air furnace is disclosed. A plurality of copper tubes are retained in a substantially parallel and equidistant relationship...
4834285 Heating and ventilating system  
A heating and ventilating system has a space heating device, in which heat is generated by combustion of a fuel, and which heats air for a building. A heat exchanger has one side through which...
4773589 Heat control systems  
Improvements in fireplace systems include several features some of which are separably usable in other heating apparatus. The features include a barometric damper adaptor, a grate structure, a...
4753219 Reflective heat conductor  
A reflective heat conductor is presented in the form of a grill having a plurality of individual cells bounded by reflective bare metal surfaces. The grill has an arcuate shape complementary to the...
4753178 Process and means for drying smoke or fumes prior to discharge  
A process and apparatus for removing moisture from smoke produced in a chemical reaction, such as a combustion reaction, by circulating outside air in heat-exchange relationship with smoke at a...
4751910 Flue gas/combustion air heat exchanger  
A flue gas/combustion air heat exchanger for a furnace. The furnace includes a combustion chamber that burns a mixture of fuel and combustion air to produce heat for a comfort zone. The resulting...
4735130 Fresh air make-up apparatus  
Fresh air make-up apparatus for a furnace located in an enclosed building comprises an elongated diffuser housing positioned adjacent the furnace, with the housing having an inlet in communication...
4730771 Air duct  
This invention provides a device for meeting the demand of a forced-air furnace for make-up air in a building, the make-up air being available from a duct leading from outside the building. The...
4717402 Air purification system  
An air purification system for use with an air conditioning apparatus which includes an air circulation system having supply air flow to a given area and return air flow for drawing air from that...
4712515 Device for evacuating into the ambient air combustion products from a condensation boiler  
A device for evacuating into the ambient air combustion products from a condensation boiler, in which at least one downstream section of the conduit for evacuating the combustion products is...
4706884 Hot air heating system  
A hot air heating system utilizing the otherwise wasted heat and water vapor in the gases of combustion to pre-heat air supplied to the combustion unit. The hot combustion gases discharged from the...
4699317 Heat exchanger flue  
This invention relates to a method and apparatus for the extraction of the heat from the flue exhaust of a fuel burn in a furnace, stove or fireplace. The Heat Exchanger Flue can be adjusted...
4688473 Wind guard device  
Wind guard device for the purpose of sustaining a gentle flow of gas in a gas passageway (6, 8, 11) between a building and the atmosphere surrounding the building and of reducing the wind effect of...
4682579 Condensate overflow control for furnace  
A safety device for monitoring the condition of the condensate outlet conduit in a high efficiency furnace is provided which comprises a float member positioned in a condensate trap arranged to...
4665890 Heating system  
A heating system designed to extract more than the usual amount of heat from a given amount of fuel by controlling the route of smoke from a firebox through a smoke duct over a tortuous path and...
4662562 Air heating and ventilating system  
An air heating and ventilation system particularly suitable for well-insulated and draught-proof dwellings or buildings, there being provided a supply duct for fresh external air, connected to a...
4660543 Apparatus for heating, storing and transferring of heat  
An apparatus having a heating chamber, (combustion chamber) a heat storing means and heat transferring means of the kind used in households, commercial furnaces, heaters, boilers, etc., having a...
4629117 Heat recovery system  
A retrofit heat recovery device for installation on existing hot air furnaces. The device is arranged to make use of the existing hot pin furnace blower.
4622947 Recuperative furnace  
A recuperative furnace and method for heating wherein the recirculation air blower directs the return air upwardly first to a recuperative heat exchanger and then to a second heat exchanger...
4611652 Method of preventing corrosion in boiler-plant equipment  
A method of preventing corrosion in boiler plant equipment when cooling flue gases originating from a combustion plant, such as flue gases containing sulphur oxide or organic acids, to a...
4611622 Drain for condensate from flue gas  
For use with a hydrocarbon-fueled furnace whose secondary heat exchanger so cools the combusted gas as to condense much of its water vapor, and having a blower to the flue, a combined trap and...
4597376 Heat recovery hood  
A fireplace hood made as a massive solid structure defining the top of the firebox of the fireplace. The solid structure absorbs, stores the heat and radiates it when the fireplace is not in use....
4580621 Heat exchanger for recovery of waste heat from flue gases  
A heat exchanger for extracting and recovering waste heat from the flue of a heater, such as a furnace. The present heat exchanger includes a housing having a plurality of sealed, oil filled,...
4568264 Combustion chamber construction  
An improved combustion chamber for a condensing furnace comprising an elongated cast body having a mixing chamber for receiving fuel and air and an expansion chamber communicating with said mixing...
4561422 Hot air type heater  
In a hot air type heating apparatus having two air outlet ports, a temperature of air current blown out of an auxiliary outlet port provided on an outlet port for a high temperature air is rendered...
4561421 High efficiency furnace  
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...
4558689 Combustion gas heat recovery apparatus  
A secondary heat exchanger is positioned within a cold air return plenum of a forced air gas or oil fired furnace to preheat cold air drawn into the furnace through the cold air plenum. A heat...
4557249 Compact high efficiency furnace  
This invention relates to a compact high efficiency furnace having a cylindrical combustion chamber and a fin and tube type heat exchanger substantially parallel, transverse to the furnace air...
4524910 Heater using hot waste flue gases  
A method and apparatus to heat a forced-air supply utilizing hot waste gases in a flue. A flue closure housing is supported by a frame that is arranged to surround an opening in the chimney. The...
Matches 1 - 50 out of 166 1 2 3 4 >