A heating, ventilation, and air-conditioning (HVAC) duct system which includes, at least in part, one or more modular, uniform, pre-manufactured duct elements having a uniform takeoff on one or more sides for connecting to a run to be connected to an air diffuser at the end. Each of the modular duct elements may include a built-in hanger support element so that the engineer merely has to design a very simple modular run of duct elements without unnecessary computations requiring different duct sizes. It also makes it simple and uniform for installing on site.

An environmental control unit for providing heated or cooled air to an enclosed environment, such as a building structure or temporary shelter. Air passes through the environmental control unit and the air is heated or cooled by a temperature control system of the environmental control unit. The heated or cooled air is provided to the enclosed environment.

The present disclosure is directed to a support block assembly including a strut and an overmolded support block. The strut may include a base, and the support block may include an anchor coupled to the strut. The anchor includes a tang with the support block overmolded on the tang with the tang extending into and encased within the support block forming a bond between the tang and the support block. In an embodiment, the base may define at least one opening. The support block is overmolded on the strut such that the support block extends through at least one opening to form the bond between the strut and the support block. The strut may include a lower side defining a dovetail-shaped groove with the support block overmolded on the strut and extending into the dovetail-shaped groove to form a bond between the strut and the support block.

The present invention relates to a flexible air duct winding and unwinding device for air supply, including an air duct reel assembly, a flexible air duct, two reel seats, a rotating air inlet assembly and a rotating drive assembly for driving the rotation of the air duct reel assembly; the air duct reel assembly includes a reel body, a reel air duct shaft, and a reel rotating shaft, the rotating air inlet assembly includes an inlet air duct, a fixed air duct and a rotating air duct rotatably inserted in the fixed air duct, the air outlet end of the inlet air duct is connected with the air inlet end of the fixed air duct, the air outlet end of the rotating air duct is fixedly connected with the reel air duct shaft, and the output shaft of the rotating drive assembly is fixedly connected with the reel rotating shaft.

Multi-unit cooling systems and structures thereof for residential, commercial, or other buildings. In one embodiment, a support duct system comprises a support duct frame including a longitudinal axis and at least one mounting bracket support, each of the at least one mounting bracket support being movable relative to the longitudinal axis of the support duct frame; and at least one mounting bracket coupled to a corresponding one of the at least one mounting bracket support, each of the at least one mounting bracket being removably couplable to a corresponding cooling unit. Each of the cooling units is independently rotatable relative to the longitudinal axis of the support duct frame.

A modular return air plenum for HVAC systems is provided that can be used to support a base an air handler unit or furnace in an HVAC system. The modular return air plenum is customizable in its width due to the use of one or more corner pieces, that when coupled together, form a connected return air plenum that is modular and adjustable in size. The modular return air plenum may include additional modular pieces that are integrated between the corner pieces. More than one modular return air plenum can be formed together and then stacked onto each other in order to increase a height of the combined modular return air plenum and provide for a taller modular return air plenum to best suit the support base needed for an air handler unit or furnace in the HVAC system.

One or more sections of a ventilated wall are provided around an outdoor space is not enclosed with a ceiling to form a fenced enclosure. Cooled air at a temperature colder than ambient temperature is supplied into the fenced enclosure through perforations in the wall and/or from an air-conditioned building adjacent to the fenced enclosure at displacement velocity to avoid disrupting stratification of air inside of the fenced enclosure. The cooled air pools inside of the fenced enclosure providing cooling for outdoor activities such as al fresco dining.

Disclosed is an air conditioning device, including a telescopic main structure, a ventilation air conditioning assembly and a control assembly, the ventilation air conditioning assembly is installed on the main structure, the main structure is configured to form a hermetic space inside it, and is configured to stretch or fold the hermetic space. The ventilation air conditioning assembly is configured to form a differential pressure environment in the hermetic space, the control assembly can be used to control the main structure to stretch or fold, and control the ventilation air conditioning assembly to adjust an air pressure, a temperature and a humidity in the hermetic space.

A road vehicle with a vehicle frame and a rear axle connected to the vehicle frame is provided with an ambient air purification device with filter elements for removing dust, particulate matter, and gases from ambient air. The ambient air purification device is arranged transverse to a longitudinal vehicle axis in an exterior region of the road vehicle at a vehicle rear of the road vehicle in an underfloor region such that at least the filter elements are arranged behind the rear axle of the road vehicle in a travel direction of the road vehicle. The ambient air purification device is received in an installation space of the vehicle frame. The ambient air purification device is flowed through in longitudinal vehicle direction. A free outflow zone of the ambient air purification device is arranged, in travel direction of the road vehicle, behind the ambient air purification device.

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.