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This remarkable high pressure insulated flexible duct, Fab 4T consists of a core made from vinyl coated fiberglass cloth which is mechanically locked together by a corrosive resistant galvanized steel helix. The liner is draped with thick fiberglass insulation and covered by a mylar sleeve.

The unsurpassed properties of this ULC-S110 and UL-181 Class 1 product combines the rugged puncture resistant fabric with a highly dependable insulated vapor barrier to create a superior high pressure thermal duct ideal for commercial or institutional HVAC use.

Pressure Rated:
  • 25" w.g. positive
  • 10" w.g. neg thru 12" dia.
  • 5" w.g. neg 14" & 16" dia.
  • 1" w.g. neg. 18" & 20" dia

Rated Velocity:
  • 5500 F.P.M.

  • PVC Coated Fiberglass Cloth

Vapour Barrier Permeance:
  • .05 Perm A.S.T.M. E96 Procedure A
  • Duct Rated

Note: This product is compressed by the manufacturer and then packaged for shipping purposes. To reach the specified length, the product needs to be unpackaged and stretched.
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Manuals (1)
Diameter (Inches):
Length (Feet):
Mylar Sleeve
Core Type:
PVC Coated Fiberglass Cloth
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