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9032950 Gas pressure control for warm air furnaces  
Systems, methods, and controllers for controlling gas-fired appliances such as warm air furnaces are disclosed. An illustrative furnace system can include a burner unit in communication with a...
8960179 Air treatment module  
An air treatment module includes an air plenum, a heat exchanger tube and a bypass duct. The bypass duct has an inlet opening in flow communication with the air plenum in juxtaposition with a...
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...
8826901 Primary heat exchanger design for condensing gas furnace  
A compact furnace heat exchanger for a gas furnace is disclosed. The compact furnace heat exchanger may include a first pass having an inlet end, a second pass in fluid communication with the...
8733337 Heat exchanger for a high efficiency hot air heating appliance and heating appliance equipped therewith  
Heat exchanger for a high efficiency hot air heating appliance (1), with at least one segment (5) and with a primary section (14) and, viewed in the flow direction (A), followed by a secondary...
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...
8672670 System and method for controlling a furnace  
Controlling a modulating gas furnace by monitoring a differential pressure associated with the modulating gas furnace using a low pressure limit switch configured to actuate at a first pressure,...
8646442 Clamshell heat exchanger  
A clamshell heat exchanger for use in a gas-fired direct combustion furnace. The exchanger comprises a first clamshell half and a second clamshell half that when joined with the first clamshell...
8550066 High efficiency furnace/air handler blower housing with a side wall having an exponentially increasing expansion angle  
An air distribution blower housing for an air handler such as a residential furnace is designed with a volute-shaped outer wall that has an exponentially increasing expansion angle in the...
8485175 Heater with catalyst and combustion zone  
A forced air heater is described having a plurality of combustion zones and an interceding cooling zone with active cooling devices. Catalytic oxidation may be implemented in the combustion zone...
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...
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...
8129662 Portable heater  
A portable heater (100) is provided. The portable heater (100) comprises an air inlet (108) and an air outlet (118). The portable heater (100) also comprises a heating chamber (115) including one...
8113269 Multi-channel heat exchanger  
A combustion gas furnace includes a plurality of primary heat exchangers for passage of combustion gases therethrough. A plurality of secondary heat exchangers receive the combustion gases from...
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.
8028438 Moisture condensation control system  
A moisture control system generally comprising a collector element is configured to be incorporated into a structure to control moisture condensation on the interior and exterior of the structure....
8025049 High efficiency furnace having a blower housing with an enlarged air outlet opening  
An air distribution blower housing for a furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the...
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...
8001958 Furnace air handler blower housing with an enlarged air outlet opening  
An air distribution blower housing for an air handler such as a residential furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower...
7954438 Wood fired boiler  
A bio-mass fueled boiler operating at delivered efficiencies in excess of 90%. Pre-heated, pressurized primary combustion air is supplied to a primary burn chamber via horizontal and vertical...
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...
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...
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...
7360534 Heated replacement air system for commercial applications  
Apparatus and a method for providing heated replacement air to a paint spray booth or other commercial process which requires heated make-up air to replace exhausted air. A blower draws outside...
7337837 Air conditioning system  
A self-contained, fully-integrated, energy efficient heating and cooling system or apparatus for conditioning the air on the interior of a building which includes a means for creating airflow...
7100597 Modular burner/blower system and method  
A modular burner/blower system and method directed to an independently operable direct fired burner unit and an independently operable blower unit that are also configured to be interconnected to...
7101172 Apparatus and methods for variable furnace control  
A furnace control system for controlling a gas-fired induced-draft furnace having a variable speed inducer blower. A control apparatus, responsive to a signal corresponding to the magnitude of a...
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...
7046918 Space heater with pretreated heat exchanger  
A space heater with a linear source of infrared radiant energy in heat exchange relationship with a heat exchanger formed of copper or aluminum material. The copper is pretreated to soften the...
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...
6945320 Tubular heat exchanger with offset interior dimples  
A tubular heat exchanger has at least one pair of dimples which are extruded into at least one tube of the heat exchanger by deforming the tube wall inwardly. The dimples of each pair are in...
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...
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...
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...
6851469 Air baffle attachment to a heat exchanger  
A clamshell heat exchanger panel has a pocket formed in an edge of a land portion of the panel so that a fastener can be inserted into the pocket, with its axis in the plane of the heat exchanger...
6793015 Furnace heat exchanger  
A furnace heat exchanger with multiple parallel flow passages wherein at least one flow passage has a cross-sectional shape which transitions from one form to another in a gradual manner so as to...
6779823 All-weather street and road maintenance vehicle  
A vehicle with a self-contained cooling and heating capability and a tenting feature for sheltering and controlling the temperature at a given location. Warm air is directed out of a heat chamber...
6769425 Fuel-fired furnace with combustion air-cooled draft inducer fan motor  
A fuel-fired, forced draft air heating furnace has a draft inducer fan disposed in a vestibule chamber having an exterior wall with an air intake opening therein. During operation of the draft...
6758208 Flexible gas-fired heat exchanger system  
A compact, highly flexible and efficient, multi-positionable, multi-dimensional and multi-stage gas-fired heat exchanger system as described. The system is connectable in a forced air duct...
6732728 Air baffle for a heat exchanger  
The invention is applicable to a furnace having a plurality of parallel, multi-pass pass heat exchanger panels that are susceptible to the occurrence of hot spots at a specific location. A baffle...
6698506 Fan housing heat exchanger  
Herein presented is a unique device for air delivery and heat transfer. The housing assembly with the integrated heat exchanger chambers of the device along with a gas train assembly, a draft fan...
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...
6675795 Freeze resistant method for draining furnace condensate in low temperature environments  
A freeze resistant method for draining liquid condensate from a condensate furnace includes quickly purging the liquid condensate from a condensate reservoir. A condensing heat exchanger connected...
6564794 Heat exchanger air baffle diverter vane  
In a furnace having a plurality of parallel heat exchanger panels over which circulation air is caused to flow, and which has a tendency for hot spots to occur at particular locations on its...
6561182 Water heater, steam generator and gas burner therefor  
A hot water boiler and/or hot steam generator as well as a gas burner and a water vessel for the hot water boiler and hot steam generator are disclosed. The water boiler or hot steam generator...
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...
6536378 Apparatus for evacuating condensation from furnace pipe systems  
An apparatus for evacuating liquid condensation from pipe systems which is particularly applicable to exhaust pipe systems in high efficiency furnaces. The apparatus forms a junction sleeve...
6497570 Gas control assembly  
A gas control assembly for a forced air furnace which includes a support frame having a top surface and two contiguous side walls which define an enclosure. A planar one piece burner assembly...
6494199 Multipoise furnace cabinet  
A multipoise furnace cabinet includes right and left sides with top and bottom plates connecting upper and lower parts of the right and left sides together. In one embodiment, top and bottom...