Double Wall Insulated Round Duct

Three standard types of double wall.

Double wall insulated round duct.

This insulated duct provides excellent acoustical and thermal control with the efficient airflow performance of single wall round duct. Double wall duct and fittings will consist of a perforated or solid inner liner 1 thick x 1 0 lb ft layer of glass fiber insulation and a solid outer pressure shell. It is shipped from the factory with the insulation pre installed reducing job site labor costs. Double wall round duct mcgill airflow s double wall round duct is fabricated to exacting tolerances that make it easy to assemble and essentially leak free.

It is a kind of metal duct designed and produced to offer an excellent acoustical and thermal function for hvac ductwork applications. In double wall round spiral duct a metal inner liner insures that high airflow velocities cannot separate insulation by pulling away from the duct s outer wall and creating erosion or airflow problems. When a perforated inner liner is specified a retaining fabric must be wrapped between the perforated inner and the glass fiber insulation. Biyang double wall spiral duct is also named dual wall spiral pipe double wall round duct and double wall insulated duct.