Abstract: A vent assembly that increases air flow and temperature control for outdoor cooking/smoking appliances, which effectively controls the space/gap for air exit, so as to improve air flow through the chimney and to increase temperature ranges and control within the smoker/chimney. The vent may have a gasket to make the grill waterproof and prevent mold when the grill is not in use. The vent can pivot or slide in one direction to ensure it does not open completely, so as to lose the air flow setting when the grill cover is opened or tilted.

Abstract: An adjustable vent topper for the chimney of a kamado-style cooking smoker or oven. The vent topper allows for more precise control of temperature and smoke within the oven, and also allows for a decorative and entertaining display of smoke from a decorative article. The vent topper comprises a generally frustoconical body having alignable openings along the side of the frustocone for controlling the flow of air and smoke from within the oven. The vent topper further includes an opening in a chimney on the top surface of the frustoconical body for receiving a decorative article. The decorative article may be a nonventing plug or may be a decorative smoke-emitting article such as a smokestack, whistle, vehicle exhaust, gun, cannon, or other smoke-emitting object.

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 heating apparatus can have a sealed combustion chamber, a burner, and various air channels to direct air into the sealed combustion chamber and to provide heated air to the desired area or environment such as an interior room. A channel can direct a flow of air along a face of the sealed combustion chamber to cool the face. The channel can be within or outside of the sealed combustion chamber. Alternatively, or in addition, the heating apparatus can be capable of operating as a direct vent device or as a vent free device.

Abstract: An outdoor grill adjustable vented chimney cap assembly having a tubular base member with vent openings and a cap member having a cover member and a tubular body with vent openings, the base member being adapted to be mounted onto the chimney of a grill, the cap member being mounted onto the base member whereby the cap member can be rotated relative to the base member such that base vent members can be adjusted to control the amount of hot gases escaping from the grill.

Abstract: Draft inducers (50,40) having hollow axis (73a,73b), folding impellers (37a) or retractable propellers (37b) having limited presence in the flue path, external motor (47a, 47b) with sensors (33a, 33b), male connection (63a, 63b) and female connection (65a, 65b) ends for connecting with flue stack and other tandem modules.

Abstract: A domestic cooking appliance is provided. The appliance has an inner space for cooking a food item; a gas burner; an exhaust opening; and a gas flue for directing exhaust gases from the inner space to the exhaust opening. The gas flue has a first part having a plurality of embossed projections, and a first fastener hole; and a second part that attaches to the first part, the second part having a plurality of embossed recesses that engage the plurality of embossed projections, and a second fastener hole that aligns with the first fastener hole when the first part and the second part are in an assembled position. The first part and the second part form a first tubular flue section when they are attached to each other, and the first part has more embossed projections than it does fastener holes.

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 meat cooker effectively cooks meat by using heated convection air to cook inside meat sections and filings, and radiant heat to cook outside meat sections. The meat cooker may include a frame having a cooking zone therein, a heat exchange assembly located within the frame, first and second fans located adjacent to the cooking zone, and a spit disposed at the cooking zone and spaced downstream of the heat exchange assembly. The first fan generates and transmits a first quantity of ambient air along a first travel path inside the heat exchange assembly. The second fan generates and transmits a second quantity of ambient air along a second travel path outside the heat exchange assembly. Notably, the first and second quantities of ambient air are heated to corresponding first and second temperatures upon passing beyond the heat exchange assembly and reaching the spit.

Abstract: The present invention pertains to a combustion device which is mounted to a wood boiler or the likes and generates high thermal power while decreasing soot by means of a simple structure.

Abstract: Disclosed herein is an oven range with a filter member improving the purification efficiency of toxic gas in a cavity. The filter member includes a plurality of sections inclined upward or downward with respect to one another and interconnected, with curves irregularly formed along the sections. Accordingly, since the toxic gas being discharged through the filter member is dispersed, entangled and mixed by the irregular curves of the filter member, a reaction time between the toxic gas and a catalyst coating the filter member is increased, thereby improving the purification efficiency.

Abstract: A combined air intake and combustion gas vent terminal is provided for engagement with at least one of a pair of pipes extending horizontally and being spaced apart to accommodate the inward flow of combustion air and the outwardly flow of exhaust air from a furnace. The terminal assembly is installed entirely outside of the building and has a stepped structure for engaging the pipes such that it can accommodate different sized pipes.

Abstract: An exhaust assembly for use with a gas-fired water heater that includes a hood for receiving exhaust gas from the gas-fired water heater, a housing, and a fan positioned in the housing to move exhaust gas from the hood out of the exhaust outlet. The hood includes a first hood mounting location and a second hood mounting location. The housing includes an exhaust outlet and a housing mounting location. In a first configuration, the exhaust outlet faces a first direction and the housing mounting location is aligned with and secured at the first hood mounting location. In a second configuration, the exhaust outlet faces a second direction different than the first direction and the housing mounting location is aligned with and secured at the second hood mounting location.

Abstract: One aspect provides a vent pipe section that comprises a body member having first and second ends and a central axis along a length thereof, a latch receiving member protruding from a side surface of and coupled to the body member and located adjacent one of the first or second ends, a movable latch attached to the body member and located adjacent an end opposite to that of the latch receiving member and configured to cooperatively engage the latch receiving member and exert a locking force along the central axis of the body member. This embodiment further includes a stop located on an outer surface of the body member adjacent the second end. A method of manufacture is also provided.

Abstract: A vent cap for a direct vent system. The cap may include a base plate and a semicircular outer housing secured to the base plate. A divider is coupled within the outer housing, with the divider forming in exhaust region and an inlet region. A heat shield is positioned within the semicircular outer housing in the outlet region. A direct vent pipe coupling is provided in the base plate and includes a first pipe having an outlet coupled to the divider.

Abstract: A venturi vent assembly for an outdoor cooker includes a cooker mounting flange attached to, and surrounding, one end of an outer tube. An inner tube extends through the outer tube and has an blower inlet at one end and an outlet. A plurality of ribs attach an exterior surface of an inner tube to an interior surface of the outer tube to define a plurality of venturi passages that surround a center passage of the inner tube. A valve plate is mounted on the inner tube and is movable between a closed position in contact with the outer tube to close the venturi passages, and an open position out of contact with the outer tube to open the venturi passages. The outlet tube of an electric blower may be mated to the inlet of the inner tube, and the venturi of assembly may be attached to a firebox of an outdoor cooker via the mounting flange.

Abstract: A method, system, and apparatus for capturing heat wherein one or more fins are arranged such that hot air is trapped by the fins and must descend below at least one of the fins in order to exit through an outlet.

Abstract: Apparatus for substantially blocking flames and spreading heated gases emitted from a broiler flue. The apparatus includes a riser placed above the broiler flue for defining a pathway along which heated gases are exhausted from the flue, a catalyst support on the riser for supporting a catalyst in the pathway for flow of heated gases through the catalyst from a bottom surface of the catalyst to a top surface of the catalyst, and a plurality of baffles in the riser extending across the pathway below the catalyst support. The baffles have the shape of inverted troughs.

Abstract: A telescoping downdraft ventilator with a system for self-aligning a vent within a housing is provided. The telescoping downdraft ventilator of the present invention comprises a housing with a track, a vent sized to fit within the housing, a drive assembly that moves the vent along the track, and a guide attached to the vent for engaging the track, wherein the guide is operably coupled with a biasing element. In one embodiment, a pair of guides is respectively coupled with pair of compression springs and is positioned on opposite sides of the vent along a line that is substantially perpendicular to a pair of tracks.

Abstract: An outdoor cooker includes a main cooking chamber defined by a base and a lid. A firebox is attached to one end of the base, and an exhaust stack is attached to an opposite end of the base. A venturi air supply has an outlet end that opens into the firebox and an inlet end that opens outside the firebox, and includes a main passage and at least one venturi passage. A blower is attached to the main passage. The firebox also includes an internal divider that divides the firebox into a lower chamber fluidly connected to an upper chamber by flow openings in a burn platform. The firebox includes a first access door with a vertical hinge axis, and a second access door with a horizontal hinge axis. A rotisserie spit support and a motor support are mounted to opposite sides of the second access door.

Abstract: A venting apparatus includes a projecting member with a projection base, and a mating socket member with a socket base, and first and second ducts in fluid communication with an appliance to vent emissions along an emission flow path. The projection base engages a first one, and the socket base engages a respective other one, of the first and second ducts. The projecting and socket members have default configurations. The projecting member is movable from the default configuration towards a deflected configuration, and biased for return therefrom. The first and second ducts are movable between sliding and locked configurations. In the sliding configuration, the projecting and socket members bear against one another, with the projecting member removed from the default configuration. In the locked configuration, the projecting member is in the default configuration, and secured to the socket member, such that the second duct securely engages the first duct.

Abstract: An exhaust gas chimney, especially an exhaust gas chimney installed directly downstream of a gas turbine or downstream of the waste heat recovery boiler of a gas turbine, includes an inner shell formed as a metal tube and surrounded by a sound absorption ring filled with bulk material for sound absorption. The sound absorption ring is formed as a ring jacket provided with a lower end plate that slopes downward and is permanently joined with the inner shell of the chimney, and with an upper end plate that slopes upward toward the inner shell. Ribs are joined to the inner shell of the chimney inside the annular jacket.

Abstract: The combination of a vent assembly with a conduit assembly bounding a flow space into which discharged combustion gases are exhausted. The conduit assembly has a first conduit length in which: a) combustion gases are communicated in a first direction in a first path between the flue outlet and a vent outlet; and b) backflow is communicated in the first path in a direction opposite to the first direction. The conduit assembly has a draft control assembly, with a conduit portion defining a flow passage in which backflow is diverted out of the first path. The draft control assembly further has a flow guide assembly that intercepts and guidingly diverts the backflow into the conduit portion to be exhausted.

Abstract: A direct sidewall vent system between a fuel-burning appliance in a first space and an external atmosphere, through a wall between the first space and external atmosphere. The direct sidewall vent system has a wall assembly that defines a first passage for communicating combustion gas generated through operation of the fuel-burning appliance to a first outlet through which the combustion gas is communicated to the external atmosphere. The wall assembly further defines a second passage for communicating makeup air from the external atmosphere to the fuel-burning appliance in the first space. The direct sidewall vent system further has an external portion that is situated within the external atmosphere and at which the first outlet is located. The external portion of the direct sidewall vent system has a top, a bottom, and spaced sides.

Abstract: A combined air intake and combustion gas vent terminal is provided for engagement with at least one of a pair of pipes extending horizontally and being spaced apart to accommodate the inward flow of combustion air and the outwardly flow of exhaust air from a furnace. The terminal assembly is installed entirely outside of the building and has a stepped structure for engaging the pipes such that it can accommodate different sized pipes.

Abstract: The present invention provides a kitchen ventilation hood for ventilating the area above a cooking area and for exhausting air containing cooking by-products from a cooking station to an external environment through an exhaust duct while using a reduced airflow. The kitchen ventilation hood of the present invention is designed to minimize the required airflow through the hood in order to thoroughly evacuate the cooking by-products. The kitchen ventilation hood of the current invention has a structure incorporating an arched interior hood surface that directs the air to be ventilated through the air intake gap and the grease filter. The more efficient airflow resulting from the arched interior hood surface allows for removal of cooking by-products with a lower airflow than that required by currently available ventilation hoods. As such, the kitchen ventilation hood of the present invention represents a significant improvement over prior ventilation hoods.

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 catalytic converter device, useful with a self-cleaning oven, is provided. The device includes (a) a dish-shaped body formed of a mesh of metal strands, the body having a base member, sidewalls projecting from the base member, and a flange extending out from the sidewalls, the mesh having a plurality of apertures therethrough; (b) a catalytic material on at least the surface of the mesh; and (c) one or more locking tabs extending from the sidewalls, wherein the locking tabs and flange cooperate to secure the device within an orifice of a gas vent so exhaust gases will pass through the apertures. The locking tabs can be formed by punching a hole in the sidewall, such that each locking tab remains integral with the sidewall, the locking tab projecting from an edge of the hole distal the flange and at angle toward the flange.

Abstract: Rooftop grease containment systems are disclosed. The disclosed grease containment systems may include a grease collection pan having (i) a pan volume surrounded by (a) a pan floor, (b) at least one pan side wall, and (c) a pan rim extending outward from an upper edge of the at least one pan side wall, (ii) at least one pan drain outlet, and (iii) at least one pan opening positioned in the pan floor, the first pan opening having a size and shape so that a first grease duct extending through a roof structure can extend through the first pan opening. The disclosed grease containment systems may further include a roof curb extending upward from the roof structure and having a roof curb upper periphery, the grease collection pan being positioned on the roof curb so that the pan rim rests on the roof curb upper periphery of the roof curb. Methods of making and using the disclosed rooftop grease containment systems are also disclosed.

Abstract: A venting apparatus includes a projecting member with a projection base, and a mating socket member with a socket base, and first and second ducts in fluid communication with an appliance to vent emissions along an emission flow path. The projection base engages a first one, and the socket base engages a respective other one, of the first and second ducts. The projecting and socket members have default configurations. The projecting member is movable from the default configuration towards a deflected configuration, and biased for return therefrom. The first and second ducts are movable between sliding and locked configurations. In the sliding configuration, the projecting and socket members bear against one another, with the projecting member removed from the default configuration. In the locked configuration, the projecting member is in the default configuration, and secured to the socket member, such that the second duct securely engages the first duct.

Abstract: A coupling feature for double-walled pipes. A double-walled vent pipe section has an outer wall with corresponding male and female coupling features formed on opposite ends thereof. The inner wall of the double-walled pipe section has a small ridge formed around the circumference of one end. When pipe sections are coupled together, the male and female coupling features on the outer walls engage, and the ridge on the inner wall of one pipe section engages with the bare inner wall of the other pipe section.

Abstract: A fireplace having a bottom venting arrangement is disclosed. The fireplace includes a firebox having a burner and a combustion chamber. Fumes produced by burning of gas at the burner are pulled into an upper exhaust plenum in the upper portion of the firebox. The upper exhaust plenum is in fluid communication with the combustion chamber. The upper exhaust plenum is also in fluid communication with an upper end of a substantially vertical exhaust passage. The lower end of the exhaust passage is in fluid communication with a blower opening in a bottom panel of the firebox. An intake side of a blower is attached to the blower opening. The blower also includes a discharge side, which is coupled to an exhaust port on the fireplace. The blower operates when a fire is burning, and fumes containing combustion products are drawn into the upper exhaust plenum.

Abstract: A fireback for use in domestic open fireplaces and which in use surrounds the fire bed and which extends upwardly to a throat (31) which in use connects with a chimney. The fireback (25) has walls with inner surfaces (26) that slope steadily inwardly from near its base (29) to the throat 31 decreasing the cross sectional area of the fireback, the larger area being at the level of the fire bed and smaller area being adjacent the throat 31.

Abstract: A system and method for controlling flow in filtering systems and for balancing the flow through fluid systems employs flow control devices that minimize suspended matter precipitation. Several embodiments are included. In a first embodiment, a smooth-walled flow control device (410) with no abrupt transitions is provided in a flow conduit section. In a second embodiment, a filter (305) acts as a flow control device. A variation of the latter locates a flow control device (300) immediately adjacent to the filter (305) and upstream of it. In other embodiments, a control system (950) detects the real time status of the load to provide on the fly critical balancing.

Abstract: The present invention provides a system and single controller for receiving constant and individualized information from a plurality of air control systems. A single controller is capable of controlling and interacting with at least two separate air control systems to control an environmental characteristic, and in the process, reduces the costs associated with the manufacturing and every day operation of the individual systems. In addition, the controller is capable of intelligently communicating with the input and output devices of the system, and particularly with each individually interfaced appliance, such that the controller can adaptively control the system through the use of stored historical data.

Abstract: This document discusses, among other things, systems, devices, and methods that increase radiant energy output, such as by using the waste airflow of combusted gas and/or ambient airflow resulting from convection, or by reducing or avoiding cooling effects of such airflows. In one example, the collected energy can be used to drive other secondary radiant sources or to preheat combustion air or ambient air. In another example, segmented secondary radiant sources are thermally isolated from each other to operate as a cross flow exchanger that exchanges thermal energy from a heated gas to a heated surface that provides radiant energy output. In a further example, a re-radiant membrane can separate the radiant source from the environment and/or reconfigure the effective shape of the primary radiant energy source.

Abstract: A spark arrestor for a wood burning fireplace chimney. The spark arrestor of the present invention is mounted in the chimney, preferably proximate the damper.

Abstract: A flue system, which may include a side flue extending horizontally out through a side of a building, the flue guard including a body with an interior surface, an exterior surface, a first end, a second end, and a channel defined therethrough from the first end to the second end, the flue guard further including fins joined to the first end and at least one stop joined to the second end, the stop being of sufficient dimension to engage the end of the side flue and method of maintaining a side flue free of debris, may include the steps of inserting a flue guard through a side flue and into a building sufficiently far to position fins joined on a first end of the flue guard at a location sufficiently far in the flue to avoid collecting frozen condensation on the fins in all natural climates.

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 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 fireplace having a bottom venting arrangement is disclosed. The fireplace includes a firebox having a burner and a combustion chamber. Fumes produced by burning of gas at the burner are pulled into a plenum in the upper portion of the firebox. The plenum is in fluid communication with the combustion chamber. The plenum is also in fluid communication with an upper end of a vertical air passage. The lower end of the air passage is in fluid communication with a blower opening in a bottom panel of the firebox. An intake side of a blower is attached to the blower opening. The blower also includes a discharge side, which is coupled to an exhaust port on the fireplace. The blower operates when a fire is burning, and fumes containing combustion products are drawn into the upper plenum. From the plenum, the fumes travel into the air passage, and then travel in a downward direction to the blower opening and into the blower intake.

Abstract: A boiler includes an outlet and with multi-positioning piping. The outlet is located on an angle on the boiler formed by angling the edge formed by the top side and back side of the boiler. One end of the piping is cut on an angle such that the piping may be connected to the boiler via the outlet to extend either vertically or horizontally from the boiler.

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: A fireback or use in domestic open fireplaces and which in use surrounds the firebed and which extends upwardly to a throat which in use connects with a chimney. The fireback (25) has walls with inner surfaces (26) that slope steadily inwardly from near its base (30) to the throat (29) decreasing the cross sectional area of the fireback, the larger area being at the level of the fire bed and smaller area being adjacent the throat(29).

Abstract: A gas burner includes a monolithic burner panel coupled to a bottom burner member for use as a bottom panel of a combustion chamber enclosure. The burner panel includes at least one aperture for providing a gas/air mixture to a top surface of the burner panel for combustion. The burner panel includes at least one elevated area. The burner panel is a composite material formed from a compression molding process. The burner panel includes elevations that can be shaped into log structures to provide a realistic fire within a fireplace unit, stove, or insert.

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 device is shown for transporting asphalt repair materials for use in repairing potholes in asphalt pavements. The device has a body with a hopper compartment for transporting and dispensing asphalt mix materials. A dry, radiant heat source is located in a heating chamber below the hopper compartment and heats the asphalt mix. Exhaust stacks in communication with the dry heat means have a damper system for retaining heat within the heating chamber, the damper system being electronically controlled in response to the temperature within the body of the device.

Abstract: A termination unit for a through-the-wall horizontal vent of a gas combustion device having a combustion chamber and a burner, is described. The termination unit comprises a wall mounting plate which is secured to a vertical wall outer surface and about an outer sleeve of a coaxial flue pipe. A fresh air chamber is secured to the wall mounting plate. An exhaust end of an exhaust flue pipe extends through the wall mounting plate and the fresh air chamber to exit through an outer wall of the chamber. Air intake ports are provided in an outer peripheral wall of the chamber to supply fresh air to a coaxial passage between the exhaust flue pipe and the outer sleeve to feed the combustion chamber. An air baffle is provided in the chamber about the exhaust end of the flue pipe and extends through the chamber. Wind deflector flanges are disposed in spaced relationship about the air intake ports of the chamber.

Abstract: A venting system for a direct vent fireplace or other direct vent appliance to direct combustion gases to an exterior area. The direct venting vent pipe facilitates unrestricted lengths of pipe installations. The vent pipe has a double wall construction forming an interior axial passageway and a coaxial outer passageway. The double walls are spaced apart by an insert to maintain coaxial spacing. Sections of the vent pipe are lockingly connected to prevent separation and ensure sealing connection between the pipe sections. Elastic seal members are utilized between the matingly connected sections and a mechanical lock assembly prevents separation.