Abstract: A furnace blower assembly includes a blower housing a blower and a motor. The blower is positioned within the housing and is adapted to rotate relative to the housing. The motor is coupled to the blower. The housing defines an outlet having an external periphery and an internal periphery. The external periphery or the internal periphery of the outlet is adapted to be fitted to a portion of the external periphery or the internal periphery of the duct. The outlet defines a longitudinal axis. The outlet has a peripheral edge and a protrusion extending outwardly from the external periphery or the internal periphery of the outlet. The protrusion is spaced from the peripheral edge of the outlet and is adapted to abut the peripheral edge of the duct.

Abstract: A furnace may include a furnace cabinet, an inducer blower, and a flue vent adapter. The furnace is configured as a multi-poise furnace and configured to be installed and operated in each of the horizontal left flow orientation, the horizontal right flow orientation, the upflow orientation, and the downflow orientation. The flue vent adapter is used when the furnace is installed and operated in the downflow orientation. Alternatively, the flue vent adapter is used when the furnace is installed and operated in each of the horizontal left flow orientation and the horizontal right flow orientation. The flue vent adapter has a unitary construction to reduce manufacturing costs, reduce a pressure drop through the flue vent adapter, and reduce leakage.

Abstract: An extractor hood (1) with a body (2) which is hollow in its interior (at 15), provided with a lateral opening (8) and containing in its cavity (15) a fan (16) which can aspirate from the lateral opening (8) fumes and/or vapors generated by an underlying hob of a kitchen, the body (2) having opposite surfaces (5, 6) with a larger area, connected by walls or surfaces (10, 11, 12, 13) with a smaller area, a first one (5) of the surfaces (5, 6) with the larger area being placed on a vertical wall (2) of said kitchen, the second surface (6) with the larger area containing the aforementioned lateral opening (8), and in front of this opening (8) there being a flat panel (23) placed spaced from this second larger surface. This flat panel (23) is parallel to the second surface (6), including when the hood (1) is in use.

Abstract: The dry oxygen content in the exhaust of an industrial furnace may be controlled to 1% or less by determining one or more of: the temperature of: each or a group of one or more burner (flame); one or more section of the radiant walls adjacent (e.g., within 5 feet of the burner); the temperature gradient across the process coils; the combustion products of one or more burners; the mass flow rate or the volume flow rate of air to each burner (e.g., the pressure drop across the variable forced air aperture ii) comparing the result to said target value; and iii) adjusting either a) the opening of the variable forced air aperture; or b) adjusting the mass flow rate or the volume flow rate of air from said one or more fans.

Abstract: The efficiencies of illustrative embodiments of vertical center flue type fuel-fired base water heaters are improved by installing in the water heaters variously configured tubular condensing type secondary heat exchangers of smaller diameters than the associated center flues. The efficiency increases are achieved with components and manufacturing processes similar to those utilized in the base water heaters and secondary heat exchanger materials similar to those in the tank portions of the base water heaters.

Abstract: This invention describes a stove comprising a combustion chamber and a flue for removing exhaust from said combustion chamber, where said combustion chamber and said flue are connected via a passageway; said combustion chamber comprising a top and a bottom, where said top and said bottom are connected by one or more sides; a catalytic unit arranged between said combustion chamber and said flue in said passageway; said catalytic unit provides a guide way for the exhaust, where said catalytic unit comprises at least one isolating members and at least one catalytic member, said catalytic member comprising a first wave-like structure, said first wave-like structure being provided on at least one catalytic surface of said catalytic member and, in use, at least partly being in contact with the exhaust and, where, in use, the direction of the exhaust is substantially transverse to the waves of said first wave-like structure.

Abstract: The present disclosure provides woodstoves that, optionally, produce low emissions. In certain embodiments, the woodstove includes a housing, a firebox disposed in the housing, an air regulator and a secondary air pipe. The air regulator includes a primary air aperture configured to supply primary air to a fire located in the firebox, a plurality of secondary air apertures configured to supply secondary air to a combustible gas emitted by the fire, and a secondary air damper. The present disclosure also provides methods of operating such a woodstove. As measured according to Method 28 of the U.S. Environmental Protection Agency, the weighted average emission rate of the woodstove of certain embodiments of the invention is no greater than about 4.5 grams of particulate emissions per hour.

Abstract: A modular flue adapter system and method is described to accommodate a conduit for exhaust between a firebox and a firebox flue, wherein the firebox is inserted into a firebox opening, by providing an offset distance and/or direction between the exhaust of the firebox and the firebox flue.

Abstract: A device, system and method for heating fluid (air) in a flue to create a draw prior to combusting a fuel in a combustion device. The device, system and method includes a housing that may be integrated about the flue. The housing may include a heat exchanger that itself may include a heating source that may be in thermal communication with the flue and a temperature differentiation driver. The heat exchanger may operate to transfer heat energy from the heating source to a fluid constrained to a path created by the flue. The result is a pressure differential created within the flue to help draw the fluid out of the combustion device. The heat exchanger may be configured such that it may cause heat transfer to the heavier, more dense fluid contained within the ventilation system prior to combusting fuel in a combustion device, thereby causing the fluid to be relatively less dense thus creating a draw.

Abstract: A water heater venting system, the water heater venting system comprising a main exhaust vent; and a first water heater in communication with a second water heater. The first water heater including an inlet, a blower assembly including a motor, an exhaust vent coupled to the main exhaust vent, a fluid flowpath created by fluid communication between the inlet, the blower assembly, and the exhaust vent, a sensor positioned along the fluid flowpath, and a controller electrically coupled to the sensor and the motor of the blower assembly, the controller controlling the speed of the motor based on at least one of an input from the sensor and an input from the second water heater.

Abstract: A hybrid wood-burning fireplace assembly configured for burning wood-based fuel, wherein the burning generates combustion exhaust. The assembly comprising a fire box having an interior area, a baffle in the interior area defining lower and upper combustion chambers relative to the baffle. The upper combustion chamber has an upper exhaust passageway between baffle and the top portion of the firebox. A secondary combustion airway has air outlets in the firebox that direct the secondary combustion air adjacent to the baffle to mix with the exhaust for non-catalytic secondary combustion of the exhaust before the exhaust flows through the upper exhaust passageway. A catalytic combustion unit is positioned above the baffle and across the upper exhaust passageway, whereby the exhaust will pass through the catalytic combustion unit after the non-catalytic secondary combustion of the exhaust and before the exhaust exits the upper combustion chamber through the upper exhaust passageway.

Abstract: A mobile kitchen comprises a housing disposed atop one or more wheel axles and a plurality of appliances disposed within the housing. Each appliance is heated by combustion of a distillate fuel. One or more air channels are disposed about each of the appliances, such that each air channel substantially isolates excess heat from combustion of the distillate fuel from a workspace within the housing. One or more first air blowers are associated with the air channels, and each is adapted to force air through the air channels and vent the excess heat to the exterior of the housing. One or more second air blowers are coupled to the housing, and each second air blower is adapted to vent a predetermined volume of air from within the workspace at least once per minute.

Abstract: A device for setting up a control element for controlling the gas pressure of a coke oven chamber without expansion-induced deviations of the control assembly, which deviations in comparable devices from the prior art result from high temperatures and temperature differences in coke oven chambers during operation. The device and the method prevent water used for shutting off, cooling and removing water-soluble impurities from riser pipes from flowing out of the control element in an uncontrolled manner. Also disclosed is a method for controlling the gas pressure of a coke oven chamber using the device, wherein the pressure in the coke oven chamber relative to the collecting main conducting raw gas is controlled by using the control element without expansion-induced deviations of the regulating assembly.

Abstract: A ceiling support box is an interface for coupling two sections of pipe as part of a venting apparatus for a heating appliance. Dual functionality is provided in a single integrated device by having a vent path for exhausting combustion by-products, and a separate air inlet path to draw in combustion air for use by the heating appliance.

Abstract: A stove includes a combustion chamber for producing heat, a thermoelectric device thermally coupled to a hot source and a cold source, a battery, a fan electrically connected to the thermoelectric device and the battery, and a controller configured to monitor the battery and thermoelectric device and configured to direct the fan be operated from power provided from the battery when power produced from the thermoelectric device is insufficient to power the fan.

Abstract: A venting system for a stove includes a screen disposed beneath a bottom opening of the stove and an elevation means for adjusting a height of the screen so as to enable the screen to selectively move close to or away from the bottom opening. More specifically, the elevation means includes a main body and an adjuster, and the screen includes an elevator. The main body has a fixation portion and a connecting portion. The fixation portion is fixed to a bottom of the stove, and the adjuster is movably connected to the connecting portion. The elevator and the adjuster are in a motional operative relationship. As such, the elevator can be elevated, by the adjuster to selectively move close to or away from the bottom opening.

Abstract: An improved wall thimble as part of a venting apparatus for a heating appliance. Dual functionality is provided in a single wall thimble device by having a vent path for exhausting combustion by-products, and a separate air inlet path to draw in combustion air for use by the heating appliance. The wall thimble is preferably formed as a two-cylindrical part housing such that a first portion can be inserted into a second portion. When a smaller exhaust pipe is routed through the two-part housing, an annular region is formed between the exhaust pipe and the walls of the housing. A first air vent is formed in the first portion to draw combustion air into the annular region from outside. A second air vent is formed in the second portion to route the combustion air from the annular region out through the second air vent to be coupled with the combustion air inlet. A baffle is disposed in the first portion to preheat the combustion air.

Abstract: A bottle shaped fire pit with a dish shaped base member, a screened side wall assembly, a hinged door, a bottle neck shaped chimney, a bottle cap shaped uppermost member and a plurality of support legs The legs support the bottle shaped fire pit assembly. The screened side wall assembly is attached to the dish shaped base member. The door forms a portion of the bottle side wall assembly. A preferred embodiment includes a plurality of radially disposed extension arms to the lower perimeter of the dish shaped bottom member and at their opposite end in a vertical support post terminating in table member. The vertical support posts terminating at their lower end in a base plate. A preferred embodiment includes each the extension arm is comprised of telescoping members that allow the arm to extend or retract as necessary.

Abstract: A hood device for grill comprises a hood, a telescoping tubing, a filter assembly, a grease cup, and an external fan. The hood partially covers a grill at a first elevated vertical position and collects smokes from the grill. The telescoping tubing extends from the hood and is configured for ventilating, and telescoping between the first and second positions. The filter assembly is disposed at a lower end of the telescoping tubing, and comprises filter with concentric and cylindrical layers. The grease cup is for collecting grease from the filter. The fan is for building up an ascending air current inside the telescoping tubing. A velocity of the ascending air current is determined according to the first elevated vertical position, a ratio of a diameter of the hood to a diameter of the grill, and a surface temperature of the grill.

Abstract: A wall thimble for use with a heating appliance. Dual functionality is provided in a single wall thimble device by having a vent path for exhausting combustion by-products, and a separate air inlet path to draw in outside combustion air for use by the heating appliance. The wall thimble is formed as a two-part housing such that a first portion can be inserted into a second portion. When an exhaust pipe is routed through end plates on the housing portions, a closed region is formed between the exhaust pipe and the housing portions. A first air vent is formed in the first or outside portion to draw combustion air into the closed region from outside. A second air vent is formed in the second or inside portion to route the combustion air from the closed region to an opening in the housing where a combustion air inlet pipe is connected.

Abstract: Smoke escaping from an outdoor wood burning furnace may be effectively arrested with a smoke arresting unit. By mounting a smoke gathering manifold above the furnace door operatively connected to a vacuum source for drawing smoke discharging from the furnace chamber through an open furnace door, the gathered and arrested smoke may be discharged through a separate discharging chimney. The vacuum source may be activated when the furnace fan is switched off and the furnace door is opened for refueling.

Abstract: A cooking device body having a heating chamber for heating an object; a fan for discharging air in the heating chamber; and an exhaust duct for guiding air blown off from said fan to the outside of the cooking device body are provided, an opening is provided at a wall of said exhaust duct, and the fan is constructed to have a motor disposed outside the exhaust duct, a first plate which has a central side attached to the motor and an outer edge side attached to the periphery of the opening, a bladed wheel which is attached to the output shaft of the motor and disposed in the exhaust duct, and a second plate which defines a cavity between said bladed wheel and the first plate.

Abstract: One aspect of the disclosure provides a termination for use with a furnace. The termination, in one embodiment, includes a face plate including an exhaust region and an air supply region, the face plate having a front surface and an opposing back surface. The termination, in this embodiment, further includes an exhaust termination portion extending from the back surface in the exhaust region, the exhaust termination portion capable of engaging a terminal end of a variety of different size exhaust conduits associated with a furnace. The termination, in this embodiment, further includes an opening extending through the face plate in the exhaust region, the opening aligned with the exhaust termination portion.

Abstract: A combustion fan installation structure of a gas radiation oven range is disclosed in which a combustion fan (200) is coupled at a space outside a space where a radiant burner (40) is positioned. Since the temperature of the sucked air for combustion is constantly maintained, an air with a sufficient air density can be supplied. Thus, it can have a stable combustion performance. In addition, an influence of the temperature change generated when the oven or the grill is operated can be excluded. Accordingly, a reliability of a combustion performance of the gas radiation oven range to be mainly used in kitchens or in hotels can be improved.

Abstract: The air intake apparatus provides for additional auxiliary air to a wood or pellet burning stove. The apparatus is provided in more than one embodiment for fit to more than one type of stove. The curved T-handle controls the damper sleeve for dampened control of the auxiliary air.

Abstract: A modular flue adapter system and method is described to accommodate a conduit for exhaust between a firebox and a firebox flue, wherein the firebox is inserted into a firebox opening, by providing an offset distance and/or direction between the exhaust of the firebox and the firebox flue.

Abstract: A modular flue adapter system and method is described to accommodate a conduit for exhaust between a firebox and a firebox flue, wherein the firebox is inserted into a firebox opening, by providing an offset distance and/or direction between the exhaust of the firebox and the firebox flue.

Abstract: A coke oven piping system (10) comprises a pipe assembly for conveying coke oven gases (14) from a coke oven to a collecting main (16); and flow control means comprising a flow orifice (22) in the pipe assembly with an associated obturating member (20), the obturating member being axially moveable between an open position at a certain distance from the flow orifice to a closed position in which it substantially obstructs the flow orifice (22). At least one throttling opening (28) is arranged so as to offer, towards the end of the closing stroke of the obturating member (20), an opening area for the gases to the collecting main (16) that depends on the axial position of the obturating member (20).

Abstract: A ceiling support box is an interface for coupling two sections of pipe as part of a venting apparatus for a heating appliance. Dual functionality is provided in a single integrated device by having a vent path for exhausting combustion by-products, and a separate air inlet path to draw in combustion air for use by the heating appliance.

Abstract: An improved wall thimble is useful as part of a venting apparatus for a direct vent heating appliance. Dual functionality is provided in a single wall thimble device by having a vent path for exhausting combustion by-products, and a separate air inlet path to draw in outside combustion air for use by the heating appliance. The wall thimble is formed as a two-part housing such that a first cylindrical portion can be inserted into a second cylindrical portion. When a smaller diameter exhaust pipe is routed through the cylindrical portions, an annular region is formed between the exhaust pipe and the cylindrical portions. A first air vent is formed in the first cylindrical portion to draw combustion air into the annular region from outside. A second air vent is formed in the second cylindrical portion to route the combustion air from the annular region to an opening in the housing where a combustion air inlet pipe is connected.

Abstract: An improved wall thimble as part of a venting apparatus for a heating appliance. Dual functionality is provided in a single wall thimble device by having a vent path for exhausting combustion by-products, and a separate air inlet path to draw in combustion air for use by the heating appliance. The wall thimble is preferably formed as a two-cylindrical part housing such that a first portion can be inserted into a second portion. When a smaller exhaust pipe is routed through the two-part housing, an annular region is formed between the exhaust pipe and the walls of the housing. A first air vent is formed in the first portion to draw combustion air into the annular region from outside. A second air vent is formed in the second portion to route the combustion air from the annular region out through the second air vent to be coupled with the combustion air inlet. A baffle is disposed in the first portion to preheat the combustion air.

Abstract: A device for arresting spark and ash issuing from, and precisely controlling the ventilation of and temperature inside, a heat source-containing vessel such as a cooking grill, stove, oven, cooker, fireplace, heater, or firebox. The device comprises a spark arrestor assembly including a base plate, a cover plate, and a spark arrestor. The base plate defines an opening. The cover plate and spark arrestor are slidably mated in two channels formed in the base plate around the opening. The cover plate and spark arrestor may be adjusted to extend across or only partway across the opening as selected by a user of the device. Tabs are provided on the cover plate and spark arrestor for easy adjustment thereof. Tabs in the base plate are positioned to define a range of slidable motion of the cover plate and spark arrestor.

Abstract: A combination of a wood stove and radon collecting system. A radon collection tube located in the basement of a building is connected via conduit leading into the combustion chamber of the stove. Burning wood within the combustion chamber is operable to normally cause radon within the building to flow into the radon collection tube, through the combustion chamber and then out through an exhaust tube. In the absence of burning wood, a lighted candle is placed in the combustion chamber tube to cause the radon within the radon collection tube to flow into the combustion chamber and then out through the exhaust tube.

Abstract: A venting system for a biomass burning appliance. The system includes at least one pipe element formed of a steel alloy comprising: a maximum of 0.025 weight percent of Carbon, a maximum of 1.0 weight percent of Manganese; a maximum of 0.030 weight percent of Sulfur; a maximum of 0.1.00 weight percent of Silicon; a maximum of 0.035 weight percent of Nitrogen; a range of 17.50-19.50 weight percent of Chromium; a maximum of 1.00 weight percent of Nickel; a range of 1.75-2.5 weight percent of Molybdenum; and a range of a combination of Titanium+Columbium having a minimum of percentage of 0.20+4×(C+N) and a maximum of 0.80 percent.

Abstract: An improved wall thimble is useful as part of a venting apparatus for a direct vent heating appliance. Dual functionality is provided in a single wall thimble device by having a vent path for exhausting combustion by-products, and a separate air inlet path to draw in outside combustion air for use by the heating appliance. The wall thimble is formed as a two-part housing such that a first cylindrical portion can be inserted into a second cylindrical portion. When a smaller diameter exhaust pipe is routed through the cylindrical portions, an annular region is formed between the exhaust pipe and the cylindrical portions. A first air vent is formed in the first cylindrical portion to draw combustion air into the annular region from outside. A second air vent is formed in the second cylindrical portion to route the combustion air from the annular region to an opening in the housing where a combustion air inlet pipe is connected.

Abstract: A draft control system and method can provide for automated control of the air drafting for heating systems. In accordance with an exemplary embodiment, an exemplary draft control system comprises at least one draft plate and a draft plate control system. Draft plate control system can comprise a control unit, one or more input devices, and one or more actuation systems. During operation, the control unit can receive a signal from an input device and use the actuation system to automatically adjust the amount of air intake by controlling movement of one or more draft plates.

Abstract: A draft inducer system has a voltage reducer capable of converting an input AC voltage to a reduced voltage, and an inducer unit capable of being coupled with the voltage reducer. The voltage reducer includes a reducer housing, a set of prongs extending from the reducer housing, and an output interface capable of delivering the reduced voltage. The set of prongs is capable of plugging into an AC outlet. The inducer unit has a unit housing, an air moving device within the unit housing, and a mixing chamber formed by the unit housing. The mixing chamber has an exhaust input to receive exhaust from a burning fuel, and an ambient air input for receiving ambient air. The ambient air mixes with the exhaust in the mixing chamber to produce mixed air. Accordingly, the mixing chamber also has a mix output capable of directing the mixed air from the mixing chamber.

Abstract: An exhaust duct orifice adjustment device for a gas-fired heater used to indirectly heat an oven communicating with a heat exchanger, wherein the exhaust duct includes a fixed annular orifice plate and a switch having a pressure sensor on opposed sides of the fixed orifice plate, turning off the burner if the pressure drop falls below a predetermined minimum. The orifice adjustment mechanism includes a moveable plate upstream of the fixed orifice plate having an opening communicating with the opening in the fixed orifice plate and an adjustment mechanism moving the orifice adjustment plate from a retracted position, wherein the opening through the fixed orifice plate is substantially unobstructed, to an extended position which restricts the opening through the fixed orifice plate, thereby adjusting the pressure drop.

Abstract: A heat exchanger for forced air circulation ovens, particularly for baking foods, of the type that comprise two chambers, a baking chamber and a heat exchange chamber, between which at least one fan circulates air. The exchanger comprises a burner and, in an upward region, coupling connectors that have an oval profile and are inserted in corresponding complementarily shaped straight vertical tubes that end in an upper manifold. The end portion of each one of the vertical tubes is surrounded by an interspace formed by a portion of tube that connects the heat exchange chamber to the manifold.

Abstract: A gas-exhausting module structure includes a casing having a first open end and a second open end. An air-exhausting channel is defined within the casing. The air-exhausting channel has an upper opening that is lower than the second open end of the casing. A blower comprising a chamber, an air outlet, and an air inlet is provided. The blower is in communication with the air-exhausting channel. The air inlet of the blower is connected to an air-sucking box. When power of the blower is turned on, it sucks air into the air-exhausting channel and expels high-pressure air through the upper opening of the air-exhausting channel.

Abstract: A draft inducer system has a voltage reducer capable of converting an input AC voltage to a reduced voltage, and an inducer unit capable of being coupled with the voltage reducer. The voltage reducer includes a reducer housing, a set of prongs extending from the reducer housing, and an output interface capable of delivering the reduced voltage. The set of prongs is capable of plugging into an AC outlet. The inducer unit has a unit housing, an air moving device within the unit housing, and a mixing chamber formed by the unit housing. The mixing chamber has an exhaust input to receive exhaust from a burning fuel, and an ambient air input for receiving ambient air. The ambient air mixes with the exhaust in the mixing chamber to produce mixed air. Accordingly, the mixing chamber also has a mix output capable of directing the mixed air from the mixing chamber.

Abstract: A low profile flue for a furnace, including a chamber, a vent collar and a downdraft diverter. The chamber is disposed above the heat exchanger and receives exhaust gas therefrom, the chamber being defined by a bottom wall with an opening therethrough for receiving the gas, two side walls projecting upwardly from the bottom, a top wall extending between the sides and spaced above the bottom wall, and an upper wall with the vent opening therethrough. The upper wall is connected along a forward edge to the bottom wall, connected on opposite ends to the side walls, and connected at a rear edge to the top wall. The upper wall front edge is substantially aligned with one of the vertically oriented housing sides, and the upper wall extends from the front edge over the heat exchanger at an angle on the order of 45 degrees from horizontal. The vent collar is on the chamber upper wall about the vent opening.

Abstract: An exhaust duct orifice adjustment device for a gas-fired heater used to indirectly heat an oven communicating with a heat exchanger, wherein the exhaust duct includes a fixed annular orifice plate and a switch having a pressure sensor on opposed sides of the fixed orifice plate, turning off the burner if the pressure drop falls below a predetermined minimum. The orifice adjustment mechanism includes a moveable plate upstream of the fixed orifice plate having an opening communicating with the opening in the fixed orifice plate and an adjustment mechanism moving the orifice adjustment plate from a retracted position, wherein the opening through the fixed orifice plate is substantially unobstructed, to an extended position which restricts the opening through the fixed orifice plate, thereby adjusting the pressure drop.

Abstract: An exhaust system for withdrawing a supply of exhaust gases from an exhaust flue of a heater and expelling the exhaust gases to atmosphere at a remote location that includes a mixing tee for mixing a flow of dilution air and a flow of exhaust gases. The mixing tee includes a first end coupled to the inlet opening of a blower housing and a second end coupled to a supply of dilution air. The dilution air inlet pipe of the mixing tee extends along a longitudinal axis. The mixing tee includes a flue pipe having a first end positioned to receive the exhaust gases from the heater and a second end that enters into the dilution air inlet pipe. The flue pipe extends along a longitudinal axis that is positioned at an angle relative to the longitudinal axis of the dilution air inlet pipe. The exhaust flue extends toward the upstream end of the dilution air inlet pipe such that the flow of dilution air impinges upon the flow of exhaust gases.

Abstract: A device for drawing dilution air into a flue pipe extending from a furnace toward a chimney is disclosed. The device comprises first and second members. The first member includes an inlet and an outlet. The inlet is connectable to a furnace side of the flue pipe to receive flue gas therefrom. The outlet of the first member discharges the flue gas out of the first member. The second member include a body, a base, an outlet, a mixing chamber, and at least one louver. The base extends from the body toward the first member and has an opening fitted around the first member so that the outlet of the first member is positioned within the body of the second member and a flow passage is formed between the first member and the body of the second member. The outlet of the second member is connectable to a chimney side of the flue pipe. The mixing chamber receives the flue gas discharged from the outlet of the first member and the dilution air from the louver(s).

Abstract: A splitter plate arrangement is provided for controlling the flow of flue gas in a vertical stack. The splitter plate arrangement 100 is operable to control the flow of flue gas in a vertical stack 128 having an annular entry 130 communicated with two inlets 126A, 126B which each communicate a respective one of the flue gas producers with the vertical stack 128. The inlets 126A, 126B are both disposed on a common inlet axis which bisects the annular entry 130 into two bisected halves, the two inlets 126A, 126B are oriented in opposition to one another such that the inlet flow 132 of flue gas through the inlet 126A flows in a direction opposite to the inlet flow 134 of flue gas through the inlet 126B. The splitter plate arrangement 100 includes a first splitter plate 136 and a second splitter plate 138.

Abstract: A flue ducting for atmospheric boilers is disclosed and comprises two coaxial generally tubular ducts 10, 11, and a generally undulating linear spacer 12 between said ducts. Linear features are provided on the mutually facing surfaces of the ducts, the features being shaped to engage the undulating spacer 12. One end of the annular space between the ducts 10, 11 is closed.

Abstract: A bypass hole is cut into a collector box cover to reduce the efficiency of a draft inducer fan when the fan is used with a furnace containing fewer burner-heat exchanger cells than the fan is optimally suited for. Thus the same inducer fan can be used for both a two-cell and three-cell furnace. A method for adjusting airflow in a draft inducer for a furnace includes collecting flue gasses from the heat exchanger cells, inducing a draft by moving the flue gasses from a collector box, through a housing, and out of an exhaust hole, and taking a portion of the flue gasses in the housing and re-entering the portion of flue gasses into the collector box instead of exhausting the portion of said flue gasses to the outside.

Abstract: A common, side-wall, Category III or Category IV-vented gaseous fuel-fired furnace and gaseous fuel-fired water heater system having a gaseous fuel-fired furnace having a furnace combustion products exhaust, a gaseous fuel-fired water heater having a water heater combustion products exhaust, and a Category III or Category IV vent in communication with the furnace combustion products exhaust and the water heater combustion products exhaust for venting of the combustion products from the furnace and water heater.

Abstract: A gas appliance, flue assembly, or vent adapter including an adjustable flow regulator which regulates the proportions and volume of dilution air and combustion products into the vent is disclosed. The flow regulator can be adjusted to allow a given appliance to exhaust vent gases through a range of different venting systems constructed from a wide range of materials. The appliance installer may adjust the appliance vent gases for a particular pre-existing or installed vent. The flow regulator also provides flow resistance which helps prevent backdrafting and the free escape of dilution air (which may be heated room air in some instances) through the vent to the outside atmosphere.