Flexible Duct - Insulated



Type 1M Acoustical Flexible Duct Insulated

Construction Features

The Flexmaster U.S.A.® Type 1M is manufactured to meet the highest quality standards in strength, permeability and fire resistance required in a flexible duct. Tested to UL standard 181, this Class 1 Air Duct is fabricated with an acoustically transparent PE inner film which allows mid-range sound energy to penetrate the duct wall.

Duct Fabric

A Polyethylene fabric, mechanically locked to the duct helix without the use of adhesives.

Duct Helix

Made from corrosive resistant galvanized steel, the duct helix is mechanically formed to attach the duct fabric without the use of adhesives.

Vapor Barrier

Fire retardant, reinforced aluminum material. Excellent strength at low temperatures. Will not age harden.


Fiberglass insulation jacket, factory wrapped.

More in this category: « 6B 3M »

Air Delivery

Life Safety

Air Measuring

  • IAQ020
    IAQ020 The IAQ020X Control Package comes standard with the IAQ50X Air Measuring Station. Combined, the IAQ020X and IAQ50X offer a complete…
    in Air Measuring Products

More Control

Proudly Representing

logo ruskin 60px logo nailor 60pxh ACME Logo Air Concepts FlexmasterLogo

InetSupervisor thermal header Engineered Comfort Mamac Logo