HAVC composite air duct

Color steel air duct,with the phenolic foam as core material ,wiht color steel on both sides,can be used to in every variety warm air condition air duct, defend row tube etc..With tradition haveinorganic compound air duct more and more economy energy, more environmental protection more safety, more economy, HH-W20 inorganic compound air duct have six price of show cost performence advantage, market foreground vast.
HAVC composite air duct