Provided are a flexible insulated air duct and a modular flexible insulated air-duct system; the flexible insulated air duct includes an air-duct main body (1); the air-duct main body (1) includes an inner air-duct layer (5) and a heat-insulating layer (4) integrally formed on the inner air-duct layer (5); the inner air-duct layer (5) is arranged inside the heat-insulating layer (4), and the heat-insulating layer (4) is a rubber/plastic material. The modular flexible insulated air-duct system made by assembling a main air duct (7), a branched air duct (8), and a connecting air duct (9) may be rapidly connected on-site using a zip fastener to form an air-duct system having any configuration.

The invention relates to a channel element for a ventilation system. The channel element has a first opening (O1), a second opening (O2), and a channel wall which extends between the openings and surrounds a channel section. The channel element has a tubular section (25) and a thermally insulating envelope section (20) which is paired with the tubular section and envelopes same at least in sub-regions. The invention further relates to a channel element system made of individual channel elements which are connected together in series and a building envelope which contains such a channel element system.

A part includes a continuous fiber substantially encased in a formation material. The fiber and formation material are arranged in a plurality of alternating layers such that the formation material of a first one of the alternating layers adheres to the formation material of a second one of the alternating layers over the length of the continuous fiber. The part may include a thin-walled hollow member such as a duct. In some embodiments a part comprises a continuous fiber prepared by an additive manufacturing process comprising the steps of: depositing a composite material on a print bed using a print head, the composite material comprising a continuous fiber and a formation material in intimate contact with the continuous fiber; moving the print head and/or the print bed during the depositing of the composite material; and consolidating the composite material.

A fire-rated ventilation duct system and improvements therein. According to an embodiment, the fire-rated ventilation duct section comprises, an inner liner configured as conduit for air movement, the inner liner comprising a metallic material and having a first end and a second end, and the first end including a first connection section, and the second end including a second connection section; an outer casing configured for encasing the inner liner, the outer casing comprising a metallic material having a fire-rating, the outer casing having a first end and a second end, and the first end including a first duct connection section configured for joining one end of a second fire-rated ventilation duct, and the second end including a second duct connection section configured for joining one end of a third fire-rated ventilation duct; an insulation layer configured to provide a thermal insulation layer between the inner liner and the outer casing, and the first connection section of the inner liner further comprising a first liner spacer and the second connection section of the inner liner further comprising a second liner spacer, the first and the second liner spacers being configured to define a cavity for receiving and positioning said insulation layer between an outer surface of the inner liner and an inner surface of the outer casing; the first duct connection section of the outer casing being configured to attach to at least a portion of the first connection section of the inner liner, and the second duct connection section of the outer casing being configured to attach to at least a portion of the second connection section of the inner liner to form a sealed duct section.

The invention provides a pre-insulated duct having a length and comprising a tube having a foam layer. The pre-insulated duct has an interior face and an exterior face and a thickness defined as a distance between the interior face and the exterior face. The interior face of the pre-insulated duct bounds an airflow space. In the present group of embodiments, the pre-insulated duct has a mounting rail system extending along the length of the pre-insulated duct. The mounting rail system includes at least one mounting rail, and preferably a plurality of mounting rails, positioned on (e.g., positioned on an exterior of) the pre-insulated duct.

This application relates to a duct system, including a duct section that includes a foam body having a first end face and a second end face, where the foam body defines a duct passage extending from the first end face to the second end face, and a sleeve that directly or indirectly covers the foam body, the first sleeve including a plurality of side walls, where at least one side wall has an integral end portion that is folded back to define at least a portion of an integral, peripheral coupling flange around an end face of the foam body.

To provide a dew-condensation preventing square duct which is capable preventing dew condensation on the duct without winding a heat insulating material around the duct. A dew-condensation preventing square duct includes: an external square duct formed by four plate-shaped external wall portions and having a substantially quadrilateral barrel shape; an internal square duct formed by four plate-shaped internal wall portions and having a substantially quadrilateral barrel shape, the internal square duct being arranged inside of the external square duct; and a holding protrusion which holds the internal square duct inside of the external square duct such that a heat insulating layer S between the external square duct and the internal square duct has a predetermined thickness T.

The invention provides a pre-insulated duct having a length and comprising a tube having a foam layer. The pre-insulated duct has an interior face and an exterior face and a thickness defined as a distance between the interior face and the exterior face. The interior face of the pre-insulated duct bounds an airflow space. In the present group of embodiments, the pre-insulated duct has a mounting rail system extending along the length of the pre-insulated duct. The mounting rail system includes at least one mounting rail, and preferably a plurality of mounting rails, positioned on (e.g., positioned on an exterior of) the pre-insulated duct.

A stabilizer component comprising a unitary body including a central flange, a plurality of first and second retention stanchions. The central flange defines a through-hole from a first end portion to a second end portion of the stabilizer component, and includes an inner circumference and an outer circumference. Each first retention stanchion, of the plurality of first retention stanchions, (i) extends orthogonally and outwardly from the outer circumference of the central flange in a first direction, and (ii) is configured to be inserted into a respective receiving slot of a first HVAC connecting component. Each second retention stanchion, of the plurality of second retention stanchions, (i) extends orthogonally and outwardly from the outer circumference of the central flange in a second direction, said second direction being opposite said first direction, and (ii) is configured to be inserted into a respective receiving slot of a second HVAC connecting component.

A system for packing and assembling a flexible duct that includes a sleeve. The sleeve includes a tubular vapor barrier and an insulating layer within the vapor barrier and includes a central cavity. Further, the sleeve is radially compressed and rolled along an axial direction. The system also includes an air core sized to fit within the central cavity of the insulating layer. The air core includes a sheet that blocks fluid flow therethrough and a structural support coiled within the sheet and the air core is flattenable and not within the rolled sleeve.