Flexible Duct Insulation

Johns Manville flexible air duct insulation, made with JM Formaldehyde-free™ Flex-Glas® EQ insulation, is designed and manufactured to meet the highest performance standards—starting with our own. JM revolutionized the insulation industry more than a decade ago by eliminating formaldehyde-based binders from our light-density fiber glass insulation.

Our latest innovation in binder technology, Flex-Glas EQ insulation, is manufactured with a bio-based binder made primarily of rapidly renewable, plant-based materials. This technology improves handling, makes for easier cutting and less dust, and satisfies the industry’s increased demand for agriculturally sourced products. In addition, JM flexible duct insulation offers excellent thermal and acoustical performance, which provides improved comfort and energy efficiency for building occupants.

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Formaldehyde-free(TM) flexible duct insulation.

Designed for residential and commercial HVAC applications, Flex-Glas® EQ Formaldehyde-free™ flexible duct insulation provides excellent acoustical and thermal performance versus metal ducts. The product is manufactured using our HERMax high-performance rotary fiberization process and features a bio-based binder made primarily of rapidly renewable plant-based materials. Flex-Glas EQ also has a lightweight, highly resilient, fiberglass core specifically designed for use in the manufacture of finished insulated flexible ducts.

R-value: 6.0 (1-5/8")
Binder Type: Bio-based
Recycle Content: 14%
Greenguard: Gold

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