Abstract: An exhaust and air intake system for a direct vent fireplace. A low-profile manifold assembly is coupled to a direct vent fireplace and is configured to receive exhaust gases from the fireplace and expel the exhaust gases outside of the building in which the fireplace is located. The manifold assembly also takes in fresh air from outside of the building and provides the fresh air to the fireplace to use during combustion. The manifold assembly includes separate chambers for the exhaust gases and the fresh air so that the exhaust gases and the fresh air do not mix together within the manifold assembly. Several pressure reduction and equalization structures are incorporated into the manifold assembly to regulate the amount and pressure of fresh air provided to the fireplace.

Abstract: Disclosed is an air umbrella apparatus including an air suction pipe having an air suction hole in an upper end thereof, a water collection pipe disposed concentrically with the air suction pipe and having an upper end coupled to a water-collection-inducing pipe for guiding rain or snow downward, an exhaust pipe disposed concentrically with the water collection pipe and having an upper end coupled to an exhaust-guiding pipe for guiding air outward, a communication pipe coupled to the air suction pipe, the water collection pipe, and the exhaust pipe for communicating the air suction pipe with the exhaust pipe, and a blower disposed between the exhaust pipe and the water collection pipe for the introduction and exhaust of air. The exhausted air forms an air curtain having a predetermined area above the exhaust-guiding pipe, thereby preventing rain and snow from falling from the exhaust-guiding pipe.

Abstract: A chimney cap includes an intake pipe extension and an exhaust pipe extension; each extension includes an opening, the exhaust opening being disposed above the intake opening. The cap further includes solid sidewalls surrounding the intake opening and a diffusion plate disposed over the intake opening and below the exhaust opening.

Abstract: A multi-purpose chimney cap device for a flue opening. The device includes a tubular housing with an open lower end surrounding the flue opening and an open upper end. A plurality of ventilation openings in the lower portion of the tubular housing draws air into the tubular housing. A plurality of exit openings are provided near the open upper end of the tubular housing. A removable heat deflector is attached to the open upper end of the tubular housing. A removable non-metal weather shield is fastened to the heat deflector to provide an enclosed chamber between the weather shield and the heat deflector. A receiver/transmitter within the enclosed chamber resides between the weather shield and the heat deflector.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: An improved method and system for flue gas recirculation (FGR) from the ID Fan located downstream of a scrubber (or other Air Quality Control Equipment including cyclones, baghouses, etc., hereafter “AQC equipment”) back to the scrubber (or other AQC Equipment) inlet to maintain the minimum required flue gas throughput during low-load conditions, thereby eliminating the need for a separate booster fan. A flue gas recirculation duct is connected from downstream of the ID Fan to the inlet of the scrubber (or other AQC Equipment). A variable flow restrictor is placed in the duct downstream of the ID Fan for controlling pressure of the recirculated flue gas. The flow restrictor is controlled in accordance to a function of boiler load or flue gas flow to produce the required backpressure that enables the flue gas to flow through the recirculation duct back to the inlet of the scrubber (or other AQC Equipment) at low loads.

Abstract: A waste heat recovery system is coupled to a flare or exhaust stack of, for example, a landfill gas treatment system, to recover at least a portion of the energy within the exhaust produced by the gas treatment system and provides the recovered energy either indirectly or directly to a secondary process, such as a wastewater treatment process, to thereby reduce the amount of energy needed to be otherwise input into the secondary process. For indirect transfer of energy the waste heat recovery system includes a transfer pipe connected between the exhaust stack of a primary process and a heat exchange unit while an induction fan connected to the transfer pipe operates to create a draft within the transfer pipe to facilitate movement of some of the exhaust gas from the exhaust stack of the primary process to the heat exchange unit.

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: A bustle for use on a flare or an exhaust stack of, for example, a landfill gas treatment system, efficiently transfers gas from the stack to a waste heat recovery system associated with the landfill gas treatment system without substantially affecting the operation of the landfill gas treatment process. The bustle enables the heat recovery system to recover at least a portion of the energy within the exhaust produced by the gas treatment system and to provide the recovered energy either indirectly or directly to a secondary process, such as a wastewater treatment process, to thereby reduce the amount of energy needed to be otherwise input into the secondary process.

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: A passive stream regulating system applicable to air-flue gas or water-flue gas heat exchangers, preferably natural gas balanced flue or natural flue home heaters and home boilers, which allows to attain non-over oxygenated stoichiometric mixture conditions. The system is included by small diameter tubes or other geometric systems formed by small channels, to produce a strong laminarization of the aerodynamic flow established within the venting tube, which are located in sections of the conduit or passage of incoming cold air to the combustion chamber of the exchanger or in sections of the conduit or passage of hot flue gases released to the environment.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: A chimney termination cap is provided with a body having a perimeter sidewall with a lower region adapted to be mounted to a chimney. The body has an opening for venting the chimney. A lid is mounted to a top of the body. A tray is mounted within the body for collecting precipitation. One of the body and the tray includes a drainage aperture for draining the precipitation from the tray. In one embodiment, the chimney termination cap includes an integrated slip-sleeve configured to receive a chimney flue or vent pipe.

Abstract: A vent assembly for use with a vent pipe assembly that includes an intake member defining an intake aperture and an exhaust member defining an exhaust aperture. The vent assembly may include a flow guide positioned adjacent to the intake aperture and configured to direct fluid flow into the intake aperture, a divider positioned between the exhaust aperture and the intake aperture and configured to minimize fluid flow between the exhaust aperture and the intake aperture, and a wind shield coupled to a distal end of the exhaust member adjacent to the exhaust aperture and configured to minimize reverse flow into the exhaust aperture. The vent assembly is configured to minimize the flow of fluids exhausted from the exhaust aperture into the intake aperture, to minimize reverse flow in the exhaust member, and to improve the flow of intake air into the intake aperture.

Abstract: An integrated exterior inlet/exhaust port for providing two air channels through a wall while only requiring a single hole through the wall.

Abstract: An integrated exterior inlet/exhaust port for providing two air channels through a wall while only requiring a single hole through the wall.

Abstract: The present invention is directed toward a vent assembly having a vent structure defining at least one vent aperture. The vent assembly includes a vent cap covering the vent aperture or apertures and a vent cover assembly extending around the vent cap and the vent. In one embodiment, the invention is directed toward a vent cover assembly for use with a vent including a vent cap that covers the vent. The vent cover assembly includes a protective structural member extending around the vent cap. The protective structural member allows for proper air flow into and out of the vent cap. In another embodiment, the invention is directed toward a vent cover assembly that has an attachment base and a plurality of semi-cylindrical members connected to the attachment base.

Abstract: The invention relates to an air flap for a ventilation, heating or air conditioning system of a motor vehicle. The flap has a shut-off surface extending between two outer edges, each having a curved or vaulted profile. End sections of the first edge adjoin the end sections of the second edge, and the end sections are joined to a pivot axis. In order, in particular, to obtain a compact construction for the air conditioning system, the air flap preferably has a shape in which a first area (A) enclosed by the first, outer edge and the pivot axis is larger than a second area (B) enclosed by the second, outer edge and the pivot axis. An air flap of this type is used, in particular, as a fresh-air/circulating-air flap.

Abstract: A heater includes a housing having an angled top, a fan having a discharge disposed parallel to the angled top of the housing, and a baffle for laminarizing airflow through the heater. The heater may also create airflow through a cover, across a housing, a heat sensitive component, and/or a raceway, and into a housing inlet. The heater may include a manifold having at least one coupling member that slidingly engages and disengages a burner. Methods for propelling combustion air through a heater, laminarizing combustion airflow in a heater, improving the efficiency of a heater, and converting a heater to make it compatible with a different fuel are also disclosed.

Abstract: A horizontal combined air intake and combustion gas vent terminal assembly is provided having improved wind pressure response and anti-recirculation characteristics. The terminal has a vent conduit disposed inside an air intake conduit. A scoop assembly is provided at the intake conduit inlet to increase the intake air pressure at the inlet. The vent conduit is nozzle-like to throttle combustion gases, thereby accelerating the gases and permitting the terminal to project the gases away from the intake conduit terminal. Vent conduit is disposed asymmetrically with intake conduit to further discourage mixing of intake air and combustion gases. The terminal may also be provided with a static pressure measuring means to provide an intrinsic safety shut down system within the terminal in case of blockage of the intake or vent by snow, ice or other debris.

Abstract: A collective air intake and exhaust chimney suitable for outdoor installation which avoids clogging by snow or frost, which comprises an inner flue (8), a heat insulating layer (12), an outer flue (13), an intake passage (10) between the outer flue and the heat insulating layer, and an exhaust passage inside the inner flue. The device has a double flue branch (3) suitable for connection, e.g., to each floor of a building, which is preferably similar in size and structure to the double flue (8, 12, 13) of the intake and exhaust chimney, and is adapted to be slidably fitted to the intake and exhaust pipe of a forced draft direct vent type heater, and is supported by a supporting member.

Abstract: The present invention is directed to a sealed vent terminal assembly intended for use in association with high-efficiency oil fired furnaces or boilers. The terminal assembly of the present invention is designed to simultaneously flow outside combustion air to the furnace or boiler and eject combustion gases discharged from the furnace or boiler.

Abstract: A horizontal combined air intake and combustion gas vent terminal assembly is provided having improved wind pressure response and anti-recirculation characteristics. The terminal has a vent conduit disposed inside an air intake conduit. A scoop assembly is provided at the intake conduit inlet to increase the intake air pressure at the inlet. The vent conduit is nozzle-like to throttle combustion gases, thereby accelerating the gases and permitting the terminal to project the gases away from the intake conduit terminal. Vent conduit is disposed asymmetrically with intake conduit to further discourage mixing of intake air and combustion gases. The terminal may also be provided with a static pressure measuring means to provide an intrinsic safety shut down system within the terminal in case of blockage of the intake or vent by snow, ice or other debris.

Abstract: A termination device for a through the wall connection to the double walled coaxial ducting of a horizontal direct vented gas fireplace or the like comprising a mounting means having an opening therethrough for mounting said device on the exterior of a wall having a passage therethrough with the opening registering with the passage, a first pipe adapted for connection with the outer of the coaxial ducts secured to the mounting means and projecting inwardly thereof and adapted to extend through the wall passage, deflector means supported in spaced relation outwardly from the mouth of the first pipe and presenting an air deflecting surface formation surrounding and sloping inwardly towards the mouth of the first pipe to a central opening in substantially coaxial relation with but spaced from the first pipe, said air deflecting surface formation being adapted to deflect air inwardly into the first pipe, a second pipe adapted for connection with the inner of the coaxial ducts extending from an outer end located o

Abstract: A furnace breathing filter protects the air inlet and exhaust gas outlet tubes of high-efficiency furnaces from plugging while enabling adequate gas flow. The furnace breathing filter comprises a filter section and a hub. The hub is designed to be inserted into and secured to a fitting on the outdoor end of the furnace tube. The filter section has a grid of openings that are sufficiently large to enable adequate gas passage but small enough to block entry of foreign materials into the furnace tube. The hub may be joined integrally with the filter section, or it maybe a separate piece that is removably assembled to the filter section. The hubs are made with different outer diameters to suit different sized furnace tubes. In an alternate design, the hub fits over the furnace tube fitting.