Tips For Installing Flexible Ducting

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When Installing, Replacing, Or Correcting Existing Flexible Duct Problems…

Keep the friction loss characteristics of flexible ducting in mind and design with it in mind. Don’t use old ‘rule-of-thumb’ guidelines.

  • Keep all flexible ducts as short and straight as possible.
  • Limit the number of connections between the duct branch and the diffusers.
  • Limit the connections between duct branch and VAV terminal units.
  • Install without any kinks
  • Support all elbow supports when making turns into buckets or plenums.
  • Install with no more the 15% compression from full stretched length.
  • Seal all connections with duct mastic and duct ties… (not use duct tape).