Double Wall Spiral Duct Installation

Fire safety the sheet metal walls of our double wall duct and fittings are noncom bustible and not prone to penetration by fire.

Double wall spiral duct installation.

Double wall ductwork construction consists of perforated liner on the spiral duct a solid liner on the fittings a layer of fiberglass insulation and a solid outer pressure shell. Double wall duct is fabricated with either snap lock or pittsburgh longitudinal seams. It is a kind of metal duct designed and produced to offer an excellent acoustical and thermal function for hvac ductwork applications. 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.

Single wall insulated round ducts. Give your round and flat oval ductwork the increased performance with thermaduct s inspiral r and floval duct systems. The surface burning charac teristics of the insulation are equal to or lower than the acceptable maxi mum values given in the national fire protection. 713 672 0509 toll free 877 774 duct 3828.

Duct direct 8610 wallisville rd. A perforated inner liner is provided on spiral duct solid on fittings with a retaining fabric wrapped between the perforated inner liner and the glass fiber. Installation of double wall duct and fittings brochure. Like our double wall products the outer metal shell is the basis of construction.

Houston texas 77029 phone. Dual wall also called double wall insulated spiral pipe. Thermal double wall duct for temperature control. The outer metal shell of straight duct may be spiral flat oval lock seam duct or longitudinal seam welded duct.

Straight double wall duct comes standard with stiffening beads. We make double wall flat oval duct with outer shell dimensions ranging from 13 x 5 to 124 x 36. Double wall duct is manufactured completely assembled with tdc corners installed. Biyang double wall spiral duct is made of big spiral duct outside insulation in the middle and small spiral duct inside.

Spiral pipe of texas has been a pioneer in the use of johns manville spiracoustic plus round duct liner system providing some of the largest systems ever produced with outer shell diameters up to 92 φ. Dual wall insulated spiral pipe consists of two concentric spiral pipes with insulation filling the space between the pipes. It is shipped from the factory with the insulation pre installed reducing job site labor costs.