Double Wall Sheet Metal Duct

Doublewall spiral pipe catalog specs.

Double wall sheet metal duct.

Doublewall spiral pipe and fittings for commercial and industrial hvac ductwork. Manufactures double wall fittings in most sizes and configurations. Also available is acrylic coated insulation that resists air erosion of fibers and the growth of fungus and bacteria. Our double wall duct and fittings are galvanized sheet metal with an inner fiberglass insulation.

Sheet metal connectors inc. Acoustical double wall duct is built with a solid outer shell and a perforated inner shell to effectively reduce system noise while thermal control double wall is built with solid inner and outer shells for assured thermal conductivity and vapor barrier integrity. Double wall duct is constructed with an insulation layer between a solid metal outer shell and either a perforated or solid metal inner shell. Double wall fittings are manufactured on our state of the art fabrication equipment.

Fittings can be fabricated with standing seam elbow lock or welded seam construction. All double wall fittings are fabricated with stiffening beads on duct sizes 19 wide and larger which have more than 10 square feet of unbraced panel. All sizes shall be listed using inside dimensions. Langdon fabricates double wall ductwork with an inner perforated metal liner and fittings with an inner solid metal liner.

Double wall pipe and fittings with e z flange and barrel clamp or standard slip connection sheet metal connectors inc. Double wall round spiral duct and fittings are one part of our complete line of hvac products.