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 ventilation device is supported in at a ventilation opening in a fabric panel of a building in which the fabric panel is supported under tension across a frame. The device includes a lower frame and an intermediate frame with respective flanges that receive a perimeter edge of the fabric panel about the ventilation opening therebetween. A cover is joined to the frames so as to prevent precipitation entering the frame opening while providing exterior ventilation from the ventilation opening of the building through one or more exterior openings in the cover.

A system for air handling, the system includes a pipe comprised of plastic having an oval cross-section. The system may further include a register boot comprised of plastic having a main body with a first opening and a second opening wherein the first opening has an oval cross-section for connection with an oval pipe and wherein the second opening is generally rectangular for fitting a register cover. The system may further include a fitting having a first end and a second end, the first end having a round opening and a second opening having an oval cross-section and a main body between the first end and the second end. The main body may be sized and shaped such that the round opening is presented orthogonally to the second opening. The system may further include a t-fitting having a first segment with a first opening attached to a second segment orthogonal to the first segment, the second segment having first and second opposite openings.

A portable heating, ventilation, and air conditioning (HVAC) unit includes a housing, a plate, and a duct assembly. The housing defines a first airflow exit and a second airflow exit. The first airflow exit is separated from the second airflow exit by a portion of the housing. The plate is configured to cover the first airflow exit. The duct assembly is configured to cover the second airflow exit. The plate is configured to be disassembled from the housing and reassembled to cover the second airflow exit, and the duct assembly is configured to be disassembled from the housing and reassembled to cover the first airflow exit.

Fabric drop-down diffusers are disclosed. An example drop-down diffuser includes a first fabric sheet. The first fabric sheet is to extend away from a ceiling at a location adjacent a supply inlet. The supply inlet is to provide a flow of air toward the first fabric sheet. The example drop-down diffuser also includes a blanking sheet to restrict air flow through the first fabric sheet. The blanking sheet is to be disposed on an interior surface of the first fabric sheet. The blanking sheet has a lower permeability than the first fabric sheet.

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 housing is constructed and arranged to be mounted to a curtain. The housing can include an aperture. Upon installation of the housing to the curtain, a portion of the curtain is removed in the region of the aperture. A flexible air duct can be presented through the aperture.

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.

A custom connector kit for connecting 2 flexible ducts together includes a connector device. The connector device is configured to connect two flexible ducts together. The connector device includes a first male connection end and a second male connection end. The first male connection end is at a first distal end of the connector device. The first male connection end is configured to be connected to a first flexible duct. The first male connection end includes a first diameter sized to fit securely inside of the first flexible duct. The second male connection end is at a second distal end of the connector device. The second male connection end is configured to be connected to a second flexible duct. The second male connection end includes a second diameter sized to fit securely inside of the second flexible duct.

A cargo space air management system for a vehicle includes a body defining one or more cavities therein and one or more ports configured to enable fluid communication through the one or more ports into at least one of the one or more cavities. The body is configured to attach to be placed in a cargo space of the vehicle, and the body is deployable from a first state to a second state, wherein in the second state the body covers a portion of the cargo space and forms an air filled cavity within the body.