A heating, ventilation, and air-conditioning (HVAC) duct system which includes, at least in part, one or more modular, uniform, pre-manufactured duct elbow elements having two faces of two sizes. Each elbow provides a twenty-two and a half degree (22.5°) bend in a duct system. When combined, the elbow sections can provide forty-five (45°) degree bends or ninety (90°) degree bends, or even offsets within a duct system. Due to the size and shape of the elbows, multiple elbows can be nested within one another for easy packing and shipping.

An air conditioner indoor unit includes an air outlet frame, a front water receiving tray, and a panel. The air outlet frame includes an upper enclosure plate, a lower enclosure plate, and a side enclosure plate located between and connecting the upper enclosure plate and the lower enclosure plate. The front water receiving tray is above the upper enclosure plate and includes a protrusion section protruding out of the side enclosure plate and a water outlet hose at the protrusion section. The water outlet hose is configured to be received in a receiving cavity formed below the protrusion section and opening forward. The panel includes a cover member configured to cover the receiving cavity when the panel is in a closed state.

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 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 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.

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.

An apparatus and method are disclosed for the automated manufacture of a duct flange profile to make small duct fittings, including a TDF duct flange profile. The duct flange profile is directed to small part duct fittings with section widths up to about 16 inches in 20 to 26 gauge metal. The apparatus includes a bending head assembly having a drive roller, a pressure roller, an anvil and a bending leaf and a roll form assembly.

Flex duct systems have a flex duct having a wire-reinforced core and first and second hollow connector ends threaded to one each of ends of the wire-reinforced core. Each connector end has a plurality of locking tabs. A boot, a saddle trunk, or a linking connector each have a plurality of sleeves each protruding radially outward and positioned to releasably, attachably receive one of the plurality of locking tabs for a fluid tight connection therewith.

An exhaust vent cap assembly can be installed in a roof deck of a building to allow a one-time connection of the insulated duct to the roof from exhaust fans within the building.

The present disclosure relates to an air-diffusion system, a computer-implemented method of designing an air-diffusion system, an apparatus for additive manufacturing an air-diffusion system, and a method of additive manufacturing an air-diffusion system.