Double Wall Insulated Spiral Duct

We make 516 spiral flat oval duct sizes that can be used for double wall construction excluding only the 3 and 4 minor axis duct sizes.

Double wall insulated spiral duct.

K value is 0 27. The insulation in our double wall spiral and fittings has both acoustical and thermal benefits. Double wall spiral ducts are as the name suggests comprised of two walls. Dual wall double wall insulated spiral is available with solid or perforated liners.

Biyang double wall spiral duct is made of big spiral duct outside insulation in the middle and small spiral duct inside. A traditional spiral duct system may be more efficient than the average rectangular duct but double wall spiral ducts offer even more efficiency in terms of energy costs. It can reduce radiated noise by 25 db or more compared to fiberglass duct board. They are constructed of a solid sheet met al outer pressure shell and a sheet metal inner liner with a layer of insu lation sandwiched between.

First there is the larger duct that s visible to everyone. It is shipped from the factory with the insulation pre installed reducing job site labor costs. Dual wall also called double wall insulated spiral pipe. The outer metal shell of straight duct may be spiral flat oval lock seam duct or longitudinal seam welded duct.

We make double wall flat oval duct with outer shell dimensions ranging from 13 x 5 to 124 x 36. Zen s 1 inch insulation has a thermal conductance of 0 27 btu hr x sq. Dual wall insulated spiral pipe consists of two concentric spiral pipes with insulation filling the space between the pipes. Biyang double wall spiral duct is also named dual wall spiral pipe double wall round duct and double wall insulated duct.

Doublewall spiral pipe and fittings for commercial and industrial hvac ductwork. 1 2 and 3 insulation thicknesses are available. 713 672 0509 toll free 877 774 duct 3828. Double wall pipe and fittings with e z flange and barrel clamp or standard slip connection sheet metal connectors inc.

Mylar barrier is available as a barrier between perforated liner and insulation. 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. Double wall round spiral duct and fittings are one part of our complete line of hvac products. Houston texas 77029 phone.

It is a kind of metal duct designed and produced to offer an excellent acoustical and thermal function for hvac ductwork applications.