Flex Duct

 

  Flex Duct

a technical diagram illustrating the proper installation of a flex duct. 

It depicts the various layers of the duct, including the inner liner and outer insulation.

 Labels specify important steps such as strapping the inner liner and insulation, using wide straps at intervals, and running lines straight using metal elbows at bends.

 Additionally, it highlights that mastic should be applied to the boot seams before attaching the flex duct, with a circled X to show where the mastic is not to be applied. 

The text also advises against puncturing the inner liner and suggests using a coupling for repairs. 

This instructional graphic provides a clear guide for correct installation practices.