A sealing device for sealing a space defined between respective end portions of an adjacent pair of orthogonal flange members of a conditioned air duct having a generally rectangular cross-section. The sealing device includes a substantially planar first plate member having a surface configured for placement in face-to-face relation with corresponding adjacent planar surfaces of the adjacent pair of orthogonal flange members. A leg member extends away from a generally central portion of the first plate member and is generally perpendicular thereto. The leg member includes second and third orthogonal plate members extending in respective orthogonal planes and having respectively orthogonal surface portions. The second and third orthogonal plate members are configured and dimensioned to engage corresponding respective adjacent orthogonal inner wall surface portions of the duct when the first plate member is positioned on the planar surface portions of the adjacent pair of orthogonal flange members.

A sealing device for sealing a space defined between respective end portions of an adjacent pair of orthogonal flange members of a conditioned air duct having a generally rectangular cross-section. The sealing device includes a substantially planar first plate member having a surface configured for placement in face-to-face relation with corresponding adjacent planar surfaces of the adjacent pair of orthogonal flange members. A leg member extends away from a generally central portion of the first plate member and is generally perpendicular thereto. The leg member includes second and third orthogonal plate members extending in respective orthogonal planes and having respectively orthogonal surface portions. The second and third orthogonal plate members are configured and dimensioned to engage corresponding respective adjacent orthogonal inner wall surface portions of the duct when the first plate member is positioned on the planar surface portions of the adjacent pair of orthogonal flange members.

An electrically isolating duct-connecting block for connecting two ducts, the duct-connecting block including a rigid, generally rectangular duct-like structure having upper and lower walls and side walls that match a cross-sectional size of a tie duct, the structure being made of an electrically nonconductive material. The block also includes a plurality of threaded fasteners embedded within the structure. Also disclosed is an electrically isolating nozzle-mounting block for mounting a nozzle to a tie duct, the nozzle-mounting block comprising a rigid flange-like structure having peripheral mounting holes and a central circular passage for conveying air to the nozzle, the structure being made of an electrically nonconductive material. The block also includes a plurality of threaded fasteners partially embedded within the structure. The blocks may be made of ultrahigh molecular weight polyethylene or any electrically and mechanically equivalent material.

An electrically isolating duct-connecting block for connecting two ducts, the duct-connecting block including a rigid, generally rectangular duct-like structure having upper and lower walls and side walls that match a cross-sectional size of a tie duct, the structure being made of an electrically nonconductive material. The block also includes a plurality of threaded fasteners embedded within the structure. Also disclosed is an electrically isolating nozzle-mounting block for mounting a nozzle to a tie duct, the nozzle-mounting block comprising a rigid flange-like structure having peripheral mounting holes and a central circular passage for conveying air to the nozzle, the structure being made of an electrically nonconductive material. The block also includes a plurality of threaded fasteners partially embedded within the structure. The blocks may be made of ultrahigh molecular weight polyethylene or any electrically and mechanically equivalent material.

The invention discloses a duct section for an air distribution system, the duct sections including an elongate frame having two opposed flange members each having an opening forming an air passage therein. A plurality of the duct sections are able to be joined together through the flanges to form an air passage of desired length. Each duct section is lined with a thermal insulating material to provide a thermally insulating lining to the air passage, the ends of the lining being at least flush with the end faces of the flanges so that when adjacent duct sections are secured together, the thermal insulation lining of adjacent duct sections is arranged to provide a continuous insulating lining of the air passage.

A carrier for seam formation and sealing comprising a roller assembly having at least one roller; a housing for holding the roller assembly; a fastening member for mounting the roller to the housing; and the fastening member is an interchangeable mechanism.

A carrier for seam formation and sealing comprising a roller assembly having at least one roller; a housing for holding the roller assembly; a fastening member for mounting the roller to the housing; and the fastening member is an interchangeable mechanism.

A duct panel, a method of manufacturing a duct panel, a duct section and a method of installing a duct are disclosed. The duct panel includes a laminate structure having an insulation layer disposed between a first support layer and a second support layer, the laminate structure having an end width; and an end cap attached to the end width and configured to be coupled to a mounting flange, wherein the mounting flange is configured to mount the duct panel. The end cap and the mounting flange comprise different materials.

Apparatus are provided for a shield and flange support for a duct. The shield and flange support includes a first side and a second side coupled to the first side to extend toward the duct. The first side and the second side cooperate to define a cavity, and the cavity includes at least one of a first insulating fluid and a first insulating solid.

Apparatus are provided for a shield and flange support for a duct. The shield and flange support includes a first side and a second side coupled to the first side to extend toward the duct. The first side and the second side cooperate to define a cavity, and the cavity includes at least one of a first insulating fluid and a first insulating solid.