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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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RE37128 |
Standing pilot furnace with vented vestibule
An induced draft, fuel-fired furnace having a heat exchanger with an inlet and an outlet includes a vent having an inlet, a burner, and a vented vestibule in fluid communication with the vent. A...
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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...
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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...
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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...
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RE36743 |
Pre-mix flame type burner
A burner for burning a combustible gas comprising fuel gas and air that has been mixed before being supplied to the burner. The burner has a flame holder concavely axially and radially recessed...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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5975883 |
Method and apparatus for reducing emissions in combustion products
A method and apparatus for reducing emissions in combustion products. Fuel and primary oxidant are introduced into a burner tube and discharged as a fuel/oxidant mixture, preferably fuel-rich, into...
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5947717 |
Vaporizing combustion chamber for a heater running on liquid fuel
A vaporizing combustion chamber for a heater running on liquid fuel, in particular a vehicle heater, in which inter alia two pipes disposed concentrically one inside the other form therebetween an...
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5941233 |
Indirect-fired heater with regeneration reclaim rotary heat exchanges
An indirect-fired climate control apparatus for modifying certain aspects or properties of air flowing through a controlled environment, with the apparatus employing a rotary air-energy exchange...
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5919035 |
Cross flow type burner apparatus
In a cross flow type burner apparatus, a burner is provided to which a gaseous fuel and air are supplied by a blower. An air reduction member is provided to reduce an amount of air supplied to...
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5882185 |
Apparatus for detecting a head wind in a gas boiler and method thereof
An apparatus for detecting a head wind in a gas boiler and method is disclosed which is capable of the magnitude of variation of voltage corresponding to the R.P.M. of an exhaust fan and the...
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5860411 |
Modulating gas valve furnace control method
A furnace control apparatus is described wherein a flow of gas into a burner assembly is directly dependent on an indicia of burner combustion air airflow, such as heat exchanger pressure drop....
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5833449 |
Two piece multiple inshot-type fuel burner structure
A multiple inshot-type gas burner structure is formed from a pair of facing, intersecured stamper sheet metal plates. A spaced plurality of parallel, rectangularly cross-sectioned burner bodies are...
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5799646 |
Curved inshot burner and method for vent-within-casing furnace
A heating apparatus for delivering heated air to an enclosure comprising a casing with at least two compartments separated by a panel. A burner with an arcuate profile is located within a first...
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5775318 |
Forced air condensing furnace and heat exchanger manifold therefor
A heat exchanger manifold (44) is provided which includes a plurality of manifold inlet openings (58) including sealant means such as grommet means (62) which receive the tube outlets (40c) of the...
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5749355 |
Multi-position furnace with condensing heat exchanger
A furnace is adapted for operation in downflow, left horizontal flow and right horizontal flow positions. The furnace includes plural burners, a two-stage heat exchanger, a header box at the heat...
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5730116 |
NOX reducing combustor tube insert apparatus
A fuel-fired air heating furnace is provided with NOx reduction apparatus associated with a plurality of combustor tubes forming a portion of the furnace heat exchanger section. Inshot-type fuel...
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5718573 |
Flashback resistant burner
A flashback resistant burner for lean fuel/air mixtures includes apparatus for mixing a primary fuel and combustion air to form a noncombustible fuel/air mixture. Means are provided for...
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5704343 |
Furnace condensate trap
A condensate trap assembly. The assembly comprises a housing having first and second condensate inlets where the first condensate inlet is sized to pass more condensate than the second condensate...
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5681159 |
Process and apparatus for low NO.sub.x staged-air combustion
A process and apparatus for combustion of fuel which results in reduction of nitrogen oxides and carbon monoxides emissions. Fuel and primary air are preferably premixed and introduced into a...
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5649529 |
Low NO.sub.x combustion system for fuel-fired heating appliances
A fuel-fired, forced air, draft induced heating furnace is provided with NOx reduction apparatus associated with a plurality of combustor tubes forming a portion of its heat exchanger structure....
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5623918 |
Inducer condensate channel
A high efficiency furnace having a heat exchanger and an inducer fan housing attached to the flue gases exit of the heat exchanger to draw flue gases out of the exchanger and force the gases out of...
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5596979 |
Sound inhibitor baffles
A baffle is located in a recessed location relative to the inlet of a heat exchanger tube and facing the burner. The baffle is made of high temperature ceramic foam and has a plurality of flutes...
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5582159 |
Condensate handlers for multi-poise furnace
A multi-poise furnace that is capable of operating in either a vertical or horizontal orientation and having a primary heat exchanger coupled to a condensing heat exchanger, apparatus for...
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