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 insulated round duct.

It is shipped from the factory with the insulation pre installed reducing job site labor costs. 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. Thermaduct s inspiral r and floval duct systems are preinsulated spiral and flat oval double wall ductwork alternatives that offer significant weight savings and near zero air leakage.

Smc double wall round spiral duct is a dependable erosion resistant alternative to lined round spiral duct providing improved protection for insulation exposed to the airstream. Three standard types of double wall. Dual wall also called double wall insulated spiral pipe dual wall insulated spiral pipe consists of two concentric spiral pipes with insulation filling the space between the pipes. 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.