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.

Double wall insulated round duct.

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. Double wall rectangular ducts utilize the same outer metal shell and insulation media as our internally lined rectangular ducts but have an additional metal inner shell between the insulation and the airstream. This insulated duct provides excellent acoustical and thermal control with the efficient airflow performance of single wall round duct.

Spiral manufacturing offers standard solutions but we have the flexibility to meet your special needs. Single wall insulated round ducts. When a perforated inner liner is specified a retaining fabric must be wrapped between the perforated inner and the glass fiber insulation. Three standard types of double wall.

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. Overall interior insulation duct liners perform well in terms of thermal efficiency and noise reduction. Duct direct 8610 wallisville rd. 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.

Spiral double wall duct size pipe outer wall size inner wall. Biyang double wall spiral duct is made of big spiral duct outside insulation in the middle and small spiral duct inside. 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. This provides some additional characteristic to the duct as well as allowing a few more insulation.

Mylar liner is between perforated inner shell and the insulation. 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. Like our double wall products the outer metal shell is the basis of construction. 3 18 26 19 24 24 25 42 22 43 60 20 61 96 18 size fitting 3 14 26.

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. These patent pending systems provide the increased air distribution efficiency of round or flat oval ductwork packaged in a light weight and high quality closed cell phenolic insulation. Double wall round hvac duct and fittings turn key duct systems is a proud member of spida.