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F118/FB118

How to Specify

  1. Determine the system pressure (W.C.) required for the application
    • Residential series are rated at 12” positive and 3/4" negative.
    • Commercial series are rated at 16” positive and 1" negative.
    • Heavy-duty commercial flex is rated at 12” positive and 3” negative.
  2. Choose the type of flexible duct that meets the local building code requirement:
    Select the R-value required R-4.2, R-6.0 or R-8.0.

Other options

  • Insulation: insulated or uninsulated
  • Jacket type: black polyester or metalized.

How to Purchase

Flex Duct FAQs

F118/FB118

Assets/Details

Submittal Data (147 KB, PDF)
  • Black polyethylene jacket
  • Double-ply, black polyester core 12" W.C. positive, 3/4" W.C. negative (1/2" W.C. neg for 14" - 20" diameter)
  • R-8.0
  • UL-listed
  • Boxed or bagged (FB series)
  • 25' and 50' lengths
  • GREENGUARD Level 4 highly microbial resistant

Available sizes (inches)

ModelLength (feet)3456789101214161820
F11825••••••••••••
FB11825•••••••••••
F11850•••