The air duct is mainly means ventilation ductwork of central air condition system, which is often neglected, but it is the important part of the whole aircondition system. At moment the common air duct mainly have 4 types: 1),GI duct; 2) acrylic steel duct; 3) glass-fiber board air duct; 4)fabric air duct

1),GI duct

The earliest ductwork making by galvanized thin steel plate, it is suitable for common air transfer, easy to rust, no function of heat preservation and noise elimination, long installation period.

2) acrylic steel duct;

Relative new ductwork, using glass fiber material, nonflammable, anti-corrosion, The disadvantages are: very rigid but brittle, it is easy to deformate, no function of heat preservation and noise elimination, long installation period.

3),glass-fiber board air duct

Newly air duct type, centrifugal glass fiber is its basic material, inside is fiberglas, outside is covering moisture-resistant aluminum foil fabric, fireproof adhesive were utilized to bond dryness, and process with technics of cutting, notch, felt, fix . According to the cross  section size of air duct and pressure to tighten appropriate fixation.

4)fabric air duct

it is the newest air duct type, replace conventional air ducts, air valves, diffusers and insulation. Also names fabric duct, textile duct, fabric air dispersion system, it is an end air distribution system. Air is discharged from fabric permeability and designed orifices. Advantages with even & comfortable, aesthetic, condensation free, hygienic & healthy, quiet, light weight, quick  installation and economical.

As the above analysis of these kinds of air duct in the markets, we can see that each kind of air duct has its particular advantage.  General speaking, the application area of GI duct is most widely, but for large and high space area, fabric air duct is leading in most distinctive in all the world.