Product list


Insulated Flexible Duct

We stock thousands of feet of Lambro insulated (model FMD) flexible ductR-value: 4.2

Type FMD (R4.2 Insulation)

Air duct consisting of a metalized polyester film and a polyester film encapsulating a galvanized steel wire helix, a fiberglass insulation rated R4.2 and an aluminized vapor-barrier reinforced with a bi-directional fiberglass scrim.
This duct meets or exceeds the following; c-UL-us UL-181 and S-110 air duct class 1.
Available diameters: 4" to 16" X 25 feet


The sizes we stock are as follows:

  • 4"
  • 5"
  • 6"
  • 7"
  • 8"
  • 10"
  • 12"
  • 14"
  • 16"

No matter how big or how small your project is, we can be your one-stop flex shop!

Lambro inc. is the largest manufacturer of flexible ducts in Quebec.  Buy Canadian!   


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