Air duct in building

Ductwork as a main part of mechanicalfacilities includes of many essential components and elements such as air ductswhich had been using as a way to transfer airstream from all kinds of airconditioning systems and also every places. Air ducts classify to variouscategories that two major assortments of these are the material and appearanceof air ducts. In appearance air ducts has two main categories, square and roundchannels. Other important classify is type of material that uses in producingair ducts example : galvanized, flexible, pre-insulated, PVC and fabric ducts

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