There are three main types of air ducts: sheet metal, pre-insulated, and flexible duct work.
Sheet metal air ducts can be made of galvanized steel or aluminum, and may be insulated inside or outside with fiberglass.
There are pre-insulated air ducts, which are relatively inexpensive to install, made of fiberglass duct board, polyurethane foam panels, or phenolic foam panels.
Air ducts can also be flexible ducts, made of flexible plastic over a wire coil.
The air is returning at a lower velocity, so you need a larger size duct.
Ductwork is simply a duct system. Ducts are essential to the circulation of air, and ductwork describes a range of duct related fields, such as duct design.
The supply duct system
add a 10 foot piece of flex duct
To adjust pressure in a VAX box that is dumping in to the return duct, measure the air coming from the AHU brought into the plenum of the air diffuser. Connect it to the outlet path formed by the bellows.?æ ?æ
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An air duct is a duct through which air is forced or extracted, which forms a part of a building's ventilation system.
An air duct is a duct through which air is forced or extracted, which forms a part of a building's ventilation system.
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