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Match Document Document Title
9033696 Induced-draft low swirl burner for low NOx emissions  
A burner for use with an induced draft furnace and which satisfies reduced nitrous oxide (NOx) emission standards is disclosed. The burner may employ a mechanical swirler that introduces a...
8985999 Fuel/air furnace mixer  
A heating, ventilation, and/or air conditioning (HVAC) furnace has a venturi premixer and a disturber disposed downstream relative to the premixer and in an undivided output of the venturi premixer.
8950390 Auxiliary heating duct for an indirect fired heater  
An auxiliary duct is supported on the housing of an indirect fired heater of the type having separate heated air and combustion passages. The auxiliary duct extends between an inlet end at the...
8893707 Gas-fired heater with carbon dioxide detector  
A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly...
8757202 Dual fuel heating source  
A dual fuel heating source can have a dual entry valve unit with a main body at least partially defining a certain flow paths or channels therethrough. The dual entry valve can have first and...
8752541 Heating system  
A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into...
8683993 Header box for a furnace, a furnace including the header box and a method of constructing a furnace  
A CEHB, a furnace and a method of constructing a furnace are disclosed. In one embodiment, the CEHB includes: (1) a fixed orifice configured to regulate air flow through a heat exchanger of the...
8668489 Racetrack carryover design for multi-burner ignition in induced draft heating system  
An ignition system for a multi-burner heat exchanger assembly, a furnace, and a method using same are disclosed. The assembly may include a plurality of adjacent heat exchanger tubes, with a...
8662885 Method and apparatus for emissions detection in a combustion appliance  
A furnace system that generates heat by combustion is provided. The furnace system includes a sensor (100) that detects a gas concentration. The sensor is in communication with the flue gas (15)....
8616194 Gas-fired furnace and intake manifold for low NOx applications  
A gas-fired air conditioning furnace comprises a monolithic intake manifold including an inlet at a first end and a plurality of outlets at a second end opposite the first end. In addition, the...
8591628 Waterless humidifier for residential and commercial furnaces  
A method and apparatus for humidifying residential and commercial buildings in which a flue gas generated by a residential or commercial furnace is provided to one side of a porous liquid water...
8568136 Heater configured to operate with a first or second fuel  
A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure. In some embodiments, a pressure regulator unit is configured to regulate...
8534235 Oil-fired frac water heater  
The present invention overcomes many of the disadvantages of prior art mobile oil field heat exchange systems by providing an oil-fired heat exchange system. The present invention is a...
8523561 Combustor of water heater  
A combustor of a water heater includes a burner member and a flame cover. The burner member has a passageway therein with an inlet and an outlet. The flame cover has a plurality of flame holes....
8479440 Self-contained heating unit for thermal pest control  
In certain embodiments, an apparatus for killing pests in an affected area includes a fuel source, a first air inlet configured to receive a first air flow from the affected area, and a second air...
8479439 Self-contained heating unit for thermal pest control  
In certain embodiments, an apparatus for killing pests in an affected area includes a fuel source, a first air inlet configured to receive a first air flow from the affected area, and a second air...
8408896 Method, system and apparatus for firing control  
Disclosed herein is a method of controlling the air to fuel ratio in a burner containing a venturi assembly. The venturi includes an air inlet, a primary fuel inlet with a converging section, a...
8376733 Burner for 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...
8347875 Gas-fired heater with carbon dioxide detector  
A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly...
8312872 Outdoor gas heater  
An outdoor gas heater used in the field is provided. The outdoor gas heater includes a primary combustion net having a dual net structure. A wind-proof cover is provided to protect a thermocouple....
8281781 Dual fuel heater  
A dual fuel heater can couple with one of two fuel sources operating at different pressures. The dual fuel heater can have a first fuel line, a second fuel line, a fluid flow controller, and a...
8241034 Fuel selection valve assemblies  
In certain embodiments, an apparatus includes a control valve for regulating fuel flow. The apparatus can include a burner and a valve assembly. In some embodiments, the valve assembly includes a...
8235708 Heater configured to operate with a first or second fuel  
A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure and can include an elongated tubular combustion chamber, a first combustion...
8167610 Premix furnace and methods of mixing air and fuel and improving combustion stability  
Premix furnace for heating an occupied space while producing lower NOx emissions and methods of mixing air and fuel delivered to a premix burner and of improving combustion stability. A mixing...
8061347 Dual fuel vent free gas heater  
A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one...
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.
8057219 Dual fuel vent free gas heater  
A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports. The gas outlet ports are in flow communication with at least one pilot flame burner. At least...
8021143 Furnace  
A gas fired furnace capable of operating with a 16:1 turndown ratio or greater. The furnace includes a plurality of burners (10) grouped into at least (14a) first and second (14b) groups, each...
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...
7988447 Formed sheet heat exchanger  
A formed sheet heat exchanger is provided for exchanging heat between fluids is provided. The apparatus includes flow divider sheets that are positioned in a stacked configuration and extend in a...
7967006 Dual fuel heater  
A dual fuel heater can couple with one of two fuel sources operating at different pressures. The dual fuel heater can have a first fuel line, a second fuel line, a fluid flow controller, and a...
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...
7850448 Furnace  
A gas fired furnace capable of operating with a 16:1 turndown ratio or greater. The furnace includes a plurality of burners (10) grouped into at least (14a) first and second (14b) groups, each...
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...
7824178 Air transfer arm for boiler  
A water heater apparatus includes a fuel-air transfer arm connecting a blower outlet to a burner inlet. The transfer arm includes a continuously curved 180° bend portion and at least one inwardly...
7766006 Dual fuel vent free gas heater  
A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one...
7748375 Negative pressure conditioning device with low pressure cut-off  
A pneumatic signal conditioning device may have a first fluid path and a second fluid path. The first fluid path includes a first inlet and a first outlet, and is configured such that the first...
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...
7607426 Dual fuel heater  
In certain embodiments, a dual fuel heater has a pressure regulating device for selectively coupling with a first source or a second source operating at different pressures. The dual fuel heater...
7494337 Apparatus and method for providing multiple stages of fuel  
The present invention provides an apparatus and method for providing multiple stages of fuel. A burner assembly having a face for production of a flame and a plurality of longitudinally adjacent...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...

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