Abstract: An industrial chimney for wet stack operation is provided with an internal lining system attached to the inner surface of the chimney. The internal lining system comprises construction elements, that are arranged in a pattern, such that the joints between the construction elements in the pattern at the flue gas side of the internal lining system are inclined at an angle ? of at least 5 degrees from horizontal.

Abstract: A fire damper for an air distribution system includes a body defining a flow path and a closure means adapted to close the flow path when a temperature within the flow path exceeds a predetermined maximum temperature. A first flange is fixed to the body and a mounting means comprising a second flange is slidably engageable with and removable from the body. The mounting means comprises securing means for securing the mounting means to the body such that a building element through which the fire damper extends, in use, can be clamped between the first and second flanges. A flexible insulating sleeve configured for use with a fire damper, and a method of installing a fire damper, are also disclosed.

Abstract: An aspirating induction nozzle for vertical connection to the outlet of a pressurized exhaust gas flow comprises a central nozzle surrounded by a wind band and one or more guide vanes. Ambient air is induced into a mixing zone within the central nozzle to dilute the primary effluent and increase the volumetric discharge flow rate to achieve greater plume lift. The mixing zone within the central nozzle is protected from crosswind influences, which would otherwise diminish plume lift.

Abstract: A chimney cap capable of being secured to a chimney and including a base; an annular collar member for insertion into a chimney, and having an outside circumference smaller than an opening of the chimney so as to be readily received therein; an annular shaped mesh member that is supported about the collar; a top supported over the base; and a plurality of support rods attached to the collar and for the purpose of supporting the annular shaped mesh member. The annular shaped mesh member has discharge openings for air flow and at least one elongated slot through which one of the support rods extends for securing the annular shaped mesh member. The elongated slot in combination with the one support rod enables adjustment of the diameter of the annular shaped mesh member.

Abstract: A nozzle stack and windband for an exhaust fan that has a nozzle stack with two side apertures for exhaust. Arranged around the periphery of a central aperture in the conical nozzle stack are two side apertures. The nozzle stack fits over the fan outlet. A nozzle stack may extend upwardly from a central aperture. Exhaust exiting the two side apertures induces a flow, especially when the windband encircles the nozzle.

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 ventilation chimney or exhaust fan flue section for hog barns has inner and outer plastic tubes formed by edge welding plastic sheets. A snug fitting insulation sheet is slid between the tubes. Collars of male and female coupling elements are inserted into the ends of the section between the inner and outer tubes and secured by screws passing through the outer tube and into the collars. The chimney can be installed by combining sections using a suitable adhesive.

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: A vent pipe and system formed from such vent pipes is provided. The vent pipe includes an inner casing, an outer casing surrounding the inner casing, and an insulation material between the inner and outer casings. The vent pipe also includes, a male end portion, a female and portion for receiving a male end portion end of another vent pipe, the female end portion being opposite the male end portion. The vent pipe further includes a first flange extending from the male end portion, and a second flange extending from the female end portion for mating with the first external extending from the male portion of another vent pipe.

Abstract: A method of relining a chimney includes: inserting a sleeve into a chimney; subsequently coating the sleeve with a flowable refractory material while the sleeve is positioned in the chimney. The flowable refractory material hardens on the sleeve to provide a refractory surface on the inner surface of the sleeve. The sleeve may be flexible or rigid, and may be lined with an insulating material. A high-temperature resistant fabric with an aluminum foil outer liner is preferred. The flowable refractory material may be a blend of inorganic materials and inert aggregates together with a high temperature resin bonding agent. The inert aggregates may include 50-80% Al2O3 and 10-40% SiO2.

Abstract: A flue liner insert with individually adjustable sides, which can be used to fasten to, extend and join two rectangular masonry clay flue tiles. Specifically, this flue liner insert fits into the interior of a clay tile and allows adjustable fastening to existing masonry clay tiles in a manner that can withstand common loads and also not interfere with the chimney draft. This flue liner insert can be used to extend masonry chimneys, join clay flue tiles, anchor ceramic chimney pots, partially or fully line existing chimneys, and mount standard or integrated chimney caps.

Abstract: A chimney liner adaptor is provided to allow air to flow between the outside environment and an annular space in a lined chimney flue. The adaptor may allow an air cooling system to operate but prevents undesirable elements from entering the annular space. The liner adaptor may be disposed between the chimney cap and the top walls of the chimney system and around the chimney liner. The adaptor may include perforated material, such as an expanded metal mesh, a metal screen, stamped metal screen, rugged netting, or the like. The perforated material permits gas flow, provides structural support for other elements of the adaptor, and filters out undesirable objects from entering the chimney.

Abstract: A chimney liner adaptor is provided to allow air to flow between the outside environment and an annular space in a lined chimney flue. The adaptor may allow an air cooling system to operate but prevents undesirable elements from entering the annular space. The liner adaptor may be disposed between the chimney cap and the top walls of the chimney system and around the chimney liner. The adaptor may include perforated material, such as an expanded metal mesh, a metal screen, stamped metal screen, rugged netting, or the like. The perforated material permits gas flow, provides structural support for other elements of the adaptor, and filters out undesirable objects from entering the chimney.

Abstract: A housing of a device for the treatment of gases hotter than the ambient temperature, in particular flue gases, comprises an exterior frame made of supports. At the interior side of said frame an insulating wall is arranged which comprises an interior side metal sheet and an exterior side metal sheet, wherein insulating material having an extremely low heat conductivity is arranged between said metal sheets.

Abstract: A chimney cap assembly for use in the installation of non-masonry chimneys including a chimney chase and a centrally extending chimney pipe. The chimney cap assembly includes a one-piece chimney cap for positioning upon the chimney chase. The chimney cap includes a central opening shaped and dimensioned for positioning about the chimney pipe, wherein the central opening includes an upwardly extending flange. The chimney cap assembly further includes a collar member having an inner edge positioned at the top of the collar member and an outer edge positioned at the bottom of the collar member. The collar member is positioned above the chimney cap such that the bottom of the collar member substantially overlaps the upwardly extending flange along a longitudinal axis extending along the chimney pipe. In addition, the inner edge of the collar member is secured to the chimney pipe creating a seal therebetween.

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 chimney moisture seal for use in combination with a chimney bounded by at least one wall of a building. The building having at least one roof having a predetermined level. The chimney having at least one end portion extending through the roof. The chimney including a veneer wall and a flue including a plurality of flue tiles coupled at a plurality of flue joints, an air space having a predetermined dimension located between said veneer wall and said flue, and a chimney cap mechanism located on said exterior end of said chimney and coupled to at least a portion of said flue and said veneer wall. The improvement being a moisture barrier structure mounted in the air space. The moisture barrier structure is positioned below the predetermined level of said roof. A method for preventing deterioration of an exterior veneer wall of a chimney structure. The method comprising mounting a moisture sealing mechanism and sealing a predetermined portion of said air space between said veneer wall and said flue.

Abstract: A new and improved storm collar for venting high efficiency furnaces comprising a rounded collar having an upper periphery, a lower periphery, and an intermediate periphery therebetween. The rounded collar slidably couples with a vent pipe with the lower periphery coupled with the cone flashing thereof. Included in the device is a circular flange having an upper inner edge, a lower inner edge, and an outer edge. The upper inner edge extends outwardly and downwardly from the intermediate periphery of the rounded collar to the outer edge. The lower inner edge extends outwardly and downwardly from the lower periphery of the rounded collar to the outer edge. The circular flange serves to cover the flashing cone to protect the flashing cone from rain and weather.

Abstract: Insulated flexible metal piping is provided which includes a metal piping section having inner and outer windings comprising metal bands which are spiral-wound in overlying relation with their leading and trailing edges forming a spiral, interlocked seam. The flexible metal piping section is slidably inserted in an insulating sleeve, which can comprise a plastic material for enclosing the metal piping section. A method of forming the insulated metal piping is disclosed which includes the steps of providing inner and outer spiral windings; interlocking the leading and trailing edges thereof; and slidably inserting a flexible metal piping section formed thereby in an insulating sleeve. Further disclosed is an application of the insulated metal piping in a flue system.

Abstract: A spacer clip for maintaining the coaxial spacing of the walls in a multiple wall chimney. A plurality of spacer clips are circumferentially positioned within the annulus between the walls. The clip attaches to the outer wall and includes a biasing arm which engages the inner wall to maintain the spacing between the walls. The biasing arm of the clips may be retracted to facilitate insertion or removal of the inner wall from within the outer wall.

Abstract: A double wall vent pipe is provided which comprises a first tubular wall that is helically corrugated to form radially outermost ridges spiraled around the outside of the first tubular wall and corresponding first recesses spiraled between the outermost ridges. The vent pipe also comprises a second tubular wall slidably disposed in a concentric relationship with the first tubular wall. The second tubular wall is helically corrugated to form radially innermost ridges which spiral around the inside of the second tubular wall and corresponding second recesses spiral between the innermost ridges. The radially innermost ridges are oriented in a direction oblique to the orientation of the radially outermost ridges such that a space between the first wall and the second wall will be maintained within the first recesses and the second recesses regardless of any bending of the vent pipe.

Abstract: Method and apparatus for controlling grease build-up in cooking vent ducts that includes installing a heat resistant close fitting custom built duct liner and periodically removing, cleaning, and replacing same.