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| Number | Title | Issue Date |
| 8056553 | Condensate pan with condensate trap A condensate pan for a condensing furnace includes a main chamber to receive exhaust gases, a condensate trap separate from the main chamber and internal the condensate pan and a main drain. ... | 11/15/2011 |
| 8011360 | Vented, gas-fired air heater A vented, gas-fired air heater especially designed for temporary heating applications includes an improved burner design providing effective air and gas mixing and efficient burning in the combustion chamber. Highly efficient heat exchanger including corrugated heat... | 09/06/2011 |
| 7874288 | Gas combustion apparatus An outer case 10 accommodating a gas combustion apparatus main body comprises a case main body 2 opening forward, and a front cover 3 closing a front end opening of the case main body 2. A waterproof packing material 17 is sandwich... | 01/25/2011 |
| 7823579 | Vertically-storable combustion heater A vertically storable combustion heater having a fuel tank having a generally-cylindrical passage formed in the fuel-tank housing through which an axle extends to support one or more wheels; a heating conduit that is coupled to the fuel tank and includes an outermos... | 11/02/2010 |
| 7677237 | Furnace with integrated blower housing and heat exchanger A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from... | 03/16/2010 |
| 7677238 | Furnace with integrated blower housing and heat exchanger A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from... | 03/16/2010 |
| 7252138 | Flow through tube plug A method and apparatus for the repair of damaged tubes, such as heat exchanger tubes, comprising inserting a flow through plug into the damaged heat exchanger tube. The flow through plug is tapered and creates a press fit when inserted within the heat exchanger tube... | 08/07/2007 |
| 7137604 | Adjustable furnace legs A new and improved adjustable furnace leg assembly is described herein. The furnace leg assembly is adjustable once the furnace has been set on the assembly. The furnace leg assembly has a carriage bolt with a rounded head, which allows the assembly to support the f... | 11/21/2006 |
| 7096933 | Furnace heat exchanger A furnace heat exchanger with multiple parallel flow passages wherein the last flow passage extends downwardly from its plane as it approaches the outlet so as to result in a lower overall height of the heat exchanger. Preferably both the upper wall and the lower wa... | 08/29/2006 |
| 7036498 | Multi-position furnace A multi-position furnace is provided that can be positioned for downflow operation, upflow operation, left horizontal flow operation, or right horizontal flow operation without major modifications in the field. The furnace includes a multi-position condensate draini... | 05/02/2006 |
| 6932080 | Arrangement of burner and heat exchanger, and air-heating apparatus Arrangement of a burner (2) and a heat exchanger (1), the heat exchanger (1) including a plurality of heat exchange elements (3) interconnected to each other with intermediate gaps, the heat exchanger (1) being arranged with an inl... | 08/23/2005 |
| 6929467 | Combustion chamber assembly for a heating device A combustion chamber assembly for a heating device includes a combustion chamber housing which forms a combustion chamber, and an ignition member which projects with an ignition section into the combustion chamber. An evaporator medium, surrounding the combustion ch... | 08/16/2005 |
| 6923173 | Hot air furnace Disclosed is a high efficiency hot air furnace including a heat exchanger assembly located in a heat exchange chamber through with comfort air is passed to be heated. The heat exchanger assembly includes a drum like combustion member located in the flow path of comf... | 08/02/2005 |
| 6910477 | Wall mounted vented heater The invention relates to a gas fired vented heater preferably having a relatively thin profile adapted for mounting on or in a wall structure and having a heat radiant display surface with visible decorative refractory defining a rear wall of the combustion chamber.... | 06/28/2005 |
| 6889686 | One shot heat exchanger burner A single burner, heat exchanger combination for particular use in a hot air furnace, includes a plurality of spaced heat exchangers, each heat exchanger having an inlet port for receipt therein of combustion gases. A unitary burner for producing combustion gases inc... | 05/10/2005 |
| 6880548 | Warm air furnace with premix burner A warm air furnace system has a valve for controlling the flow of fuel, and a mixing component for receiving fuel from the valve and mixing the fuel with air to form an air-fuel premix. The warm air furnace system also has a burner assembly for receiving the air-fue... | 04/19/2005 |
| 6694968 | Linear multi-oil furnace and heat exchanger A multi-oil fired furnace having a heat exchanger that extends rearwardly of the combustion chamber and utilizes laminar air flow around the combustion chamber to minimize the width and height dimensions of the cabinet shell for the furnace. The heat exch... | 02/24/2004 |
| 6684878 | Condensate drainage system for an outdoor condensing furnace An outdoor condensing furnace is provided with a condensate drain line which passes through the heat exchange compartment and to a location within the building where it can be discharged at temperatures above freezing. During heating operation, the drain ... | 02/03/2004 |
| 6663381 | Burner arrangement for low NOX emissions In a gas burner for introducing a fuel/air mixture into a combustion chamber, a tube is provided for introducing a source of primary air into a core portion of the fuel air mixture. The resulting secondary flame that is produced within the primary flame c... | 12/16/2003 |
| 6595201 | Safeguard for furnace draft system A draft safeguard apparatus for use in a multi-poised furnace having an inducer housing for receiving flue gases from a heat exchanger. The furnace flue pipe is attached to the inducer housing by an elbow that is rotatably connected to the inducer housing... | 07/22/2003 |
| 6543438 | Furnace with dual use inducer motor An improved furnace including a two-speed inducer motor which can be used as a single speed motor for either a vertically or horizontally vented furnaces. The inducer has a common terminal, a low speed terminal and a high speed terminal. One lead is attac... | 04/08/2003 |
| 6526964 | Direct gas-fired burner assembly A gas burner assembly, including its gas intake manifold, in combination with upper and lower tiered baffles, and includes the side chambers for regulation of flow if air through a draw in and through type of burner assembly, to provide heated air for a b... | 03/04/2003 |
| 6484798 | Furnace heat exchanger A multipass heat exchanger with return bends between passes has its first return bend which varies in cross sectional area in the direction of the of the gas flow. The cross sectional area first increases so as to thereby reduce the velocity of the flue g... | 11/26/2002 |
| 6386193 | Combustion heater A combustion heater includes a combustion chamber having a burner input port and a heat output port. A burner is coupled to the burner input port, whereby heat is generated within the combustion chamber. A heat exchanger is provided having an inlet and an... | 05/14/2002 |
| 6382203 | Furnace with combustion air-cooled draft inducer fan A fuel-fired, forced draft air heating furnace is provided with a draft inducer fan structure which substantially reduces the operational noise of the furnace. The draft inducer fan is disposed within a sealed burner vestibule area of the furnace and is p... | 05/07/2002 |
| 6305369 | Safeguard for furnace draft system A draft safeguard apparatus for use in a multi-poised furnace having an inducer housing for receiving flue gases from a heat exchanger. The furnace flue pipe is attached to the inducer housing by an elbow having a first linear inlet section that is rotata... | 10/23/2001 |
| 6289685 | Air conditioner with combustion heater for refrigerant A compressor, an outdoor heat exchanger, an indoor heat exchanger, and the like are connected to each other with refrigerant piping to form a refrigerant circuit in a closed loop configuration. The refrigerant circuit is provided with a four-way switch va... | 09/18/2001 |
| 6286500 | Heaters A space heater capable of providing both radiant and blown warm air heating to a space beneath the heater. The heater comprises a housing, the underside of which is recessed to define a channel in which a combustion tube is mounted. The heater has a burne... | 09/11/2001 |
| 6283115 | Modulating furnace having improved low stage characteristics An improved, induced-draft, gas-fired furnace which is adapted to operate at any of a high, medium and low firing rate. A pressure sensing assembly generates differential pressure signals that vary in accordance with the pressure across a heat exchanger a... | 09/04/2001 |
| 6236321 | Clean out alert for water heaters An apparatus and method for determining and communicating a need for water heater clean out based on scale deposit buildup is disclosed in which a sensed increase in average reheat time is employed as a measure of deposit buildup and to initiate a clean o... | 05/22/2001 |
| 6161535 | Method and apparatus for preventing cold spot corrosion in induced-draft gas-fired furnaces A method and apparatus for increasing the circulating airflow of induced-draft, gas-fired multi-stage furnaces without creating conditions that result in cold spot corrosion therein. Control circuitry is provided to selectably increase the circulating air... | 12/19/2000 |
| 6109255 | Apparatus and method for modulating the firing rate of furnace burners A modulating furnace includes a first air flow path which directs supply air to one or more combustion burners and through a heat exchanger, and a second air flow path which directs supply air around the one or more burners and heat exchanger. When the fi... | 08/29/2000 |
| 6082993 | Induced draft heater with premixing burners A fuel/air mixture control for an induction heater having a tube-type burner includes a side-venting fuel nozzle for introducing fuel into an induction air stream entering the burner. A multi-speed blower draws combustion air into the burner and an air fl... | 07/04/2000 |
| 6044837 | Intertwined helical heat exchanger A combustion and heating chamber into which a fluid is pumped under pressure is provided. A burner is positioned in the combustion and heating chamber to provide a heat load to the pressurized fluid in the chamber. As the fluid is heated its internal pres... | 04/04/2000 |
| 6027334 | Evaporation burner for a heater In an evaporation burner with a combustion chamber (1) for a heater or the like with a peripheral boundary wall (29), a front boundary wall (6) and an air-supply nozzle (8) projecting coaxially into the combustion chamber (1) with radial air outlets (9) t... | 02/22/2000 |
| 6021775 | Mobile home furnace A compact gas combustion furnace includes a substantially rectangular casing having an interior defined by a plurality of compartments. A draft inducer is mounted above the heat exchanger compartment to allow a multipass heat exchanger to be used while al... | 02/08/2000 |
| 6000933 | Variable burner orifice furnace manifold A new variable burner orifice furnace manifold for reducing the amount of heating fuel used without reducing the heating ability of the furnace. The inventive device includes a manifold pipe with a plurality of spaced apart gas exit openings between its o... | 12/14/1999 |
| 5992410 | High-efficiency furnace for mobile homes An improved high-efficiency furnace for use with manufactured housing has a modular heat exchanger assembly having a drum and a plurality of serpentine shaped tubes. A burner extends at least partially into the drum portion of the heat exchanger which act... | 11/30/1999 |
| 5988157 | Furnace with split heat exchanger A furnace having improved heat exchanger, which is particularly suitable for use in a positive pressure, direct-vented hot air furnace. The heat exchanger has a split housing construction allowing the heat exchanger to be partible into halves. Parting the... | 11/23/1999 |
| 5979433 | Heater A heater for heating a stream of air has a burner assembly to heat the stream as it flows along a flow path and a primary heat assembly positioned in the flow path and coupled to the burner assembly for conducting gaseous combustion products. The primary ... | 11/09/1999 |
