Fabric Air Ducts

Made of high-strength material, ReturnSox™ return air duct system utilizes patented internal support frame to maintain the flexible air duct in rectangle shape and return air under negative pressure. Returnsox™ is a replacement of traditional return air duct with cable suspension system to install on site.
 
There are two types according to the material:
Durkeesox Returnsox ve InsuSox Returnsox.