An insulated ductwork system particularly adapted for exterior use joins together pre-assembled air circulation duct sections that each have a ductwork passageway that is formed solely with insulation panels of foam insulation material disposed between foil sheets that are in turn covered by additional insulation material and an outer protective jacket to seal the ductwork from weather effects. The air circulation duct sections are used without traditional metal ductwork forming any part of the air circulation duct. Receiving flanges extend from the ends of each air circulation duct section and the duct sections are joined together in abutting relation with at least one slidably engageable sleeve that engages the flanges. A filler insulation is disposed over the sleeve. A closure band is disposed over the filler insulation and joined to exterior surfaces of the air circulation duct sections.

[Problem]

To provide a bent product from an integrally extrusion molded body without the loss of lightweight properties or the like.

[Solution]

A bent product (10) that is formed by bending an integrally extrusion-formed body and has: a metal core material (20) provided with a tube-shaped peripheral wall (21) and a first partition wall (23) that extends in the longitudinal direction of the tube shape and divides the inner space of the peripheral wall in the direction of the major axis of the cross section perpendicular to the longitudinal direction of the tube shape; and a covering layer (40) that is formed on the outer surface of the core material and contains at least a thermoplastic resin. The thickness (t) of the peripheral wall is 0.8-2.3 mm, and a reinforcing means is provided to the inner space side of the peripheral wall at a section (25) thereof to the inside of the bend.

A fire-rated exhaust duct system comprising a modular configuration or structure. The fire-rated exhaust duct system comprises a plurality of exhaust duct sections. Each of the exhaust duct sections is configured to be joined or connected with other exhaust duct sections in the field or at an installation site, e.g. in building housing a kitchen facility or a laboratory facility to form longer sections or runs for exhaust duct system.

A duct of the present invention includes a pair of groove-shaped members which are formed of sound absorbing sheets and a pair of flange portions which are formed of parts of the pair of groove-shaped members that are extended outward from groove opening edges and which are joined in an overlaid state on each other when the pair of groove-shaped members are arranged such that groove openings are opposed to each other. The pair of flange portions includes a seal portion which is formed by crimping the sound absorbing sheets in parts of the flange portions along the groove opening edges and an outer thick portion which is extended outward from the seal portion and which is formed of the sound absorbing sheet thicker than the sound absorbing sheet of the seal portion.

A duct includes a number of wall sections which are at least partly produced from fiber material and a binder agent. Together, the wall sections define a closed, elongate flow space. The wall sections which meet one another are united by the intermediary of at least one longitudinal fold or joint line. In the fiber material and the binder agent of the duct, there are disposed longitudinal rigidifying elements. On the outside of the duct, there are longitudinal bead-liked projections which include the fiber material and the binder agent.

A duct includes a polymeric duct wall that circumscribes a fluid-conveyance passage. The polymeric duct wall includes, relative to the fluid-conveyance passage, an inner surface and an outer surface. An electrically conductive coating is disposed on at least one of the outer surface and the inner surface.

The invention relates to a tongue-and-groove coupling between panels of self-supporting air-conditioning ducts and the like, of the type that is provided in order to establish an optimum fit of the canted edge corresponding to the panels that are coupled in a tongue-and-groove manner, and also, to avoid the air coming into contact with the core of the duct therein. To this end, the panels consist of a core of insulating material complemented by an outer layer and inner layer based on aluminum or some other coating, the juxtaposing canted edge or edge between the panels having an oblique cut in relation to the horizontality or longitudinal intermediate line in the joint between the two panels; the aluminum layer or coating, which determines the inner face of the duct, extending beyond the edge of the panel, and being fixed to the oblique surface that defines the coupling profile.

A joint seal system and method may include a seal and a band. The seal may be positioned between abutting flanges of two adjacent duct sections. A band may be positioned over the two flanges and the flange interface. The joint seal system and method may be configured to mitigate and/or eliminate leakage of pressure, flue gases, condensate, and/or any other fluid, gas, and/or vapor between abutting flanges of duct sections at a flange interface.

A ventilation duct for a fire rated ventilation duct wall penetration has one or more metal sheets forming said duct, wherein said metal sheet duct is covered on the outside by a heat insulating material, and said duct includes elongated stiffening members located on the outside of the duct and attached to said metal sheets. The stiffening members each comprises a metal profile and at least one non-combustible bar of inorganic material. The metal profile is fixed to the metal sheet of the duct and retains the non-combustible bar by at least partly encircling the bar.

A duct is shaped and sized for connectability to a vent (or vent adaptor). The duct has an end portion with a flared section separated from a tapered flap section by a lip. The flaps are foldable inwardly at the lip upon engagement with the vent, and airflow through the duct presses the folded flaps against the vent for additional securement of the connection between same. Additional securement and stability may be provided by an adhesive retaining a tapered flap section to a flared section following inward folding of the tapered flap section.