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.

Biyang double wall spiral duct is also named dual wall spiral pipe double wall round duct and double wall insulated duct. When a perforated inner liner is specified a retaining fabric must be wrapped between the perforated inner and the glass fiber insulation. 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.

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. 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. 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.