Johns Manville DW-48X75X2.2F-75 Duct Wrap Fsk 48x75

Product Description

The JOHNS MANVILLE DW-48X75X2.2F-75 is a blanket-type duct wrap insulation engineered for thermal and acoustical performance on HVAC ductwork. Made from glass fibers bonded with a formaldehyde-free white resin, it delivers lightweight, highly resilient insulation without the off-gassing concerns associated with traditional resin binders. This roll measures 48 inches wide by 75 feet long at a thickness of 2.333 inches and comes pre-faced with an FSK (foil-scrim-kraft) vapor barrier. A 2-inch stapling tab is integrated into the facing for clean, fast mechanical fastening during installation. Licensed HVAC contractors and sheet metal mechanics install this product on exterior duct surfaces in both new construction and retrofit applications.

This duct wrap is suited for residential and light commercial HVAC systems where exterior duct insulation is required. It is applied to the outside of supply and return air ducts routed through unconditioned spaces such as attics, crawlspaces, and mechanical rooms. The FSK facing serves as both a vapor retarder and a protective jacket, making it appropriate for spaces with elevated ambient humidity. The formaldehyde-free resin formulation makes it suitable for projects with indoor air quality requirements or green building specifications. Typical installations involve wrapping rectangular or round sheet metal ductwork prior to final sealing and securing of the facing seams.

Key Features

• Formaldehyde-free glass fiber resin binder reduces IAQ concerns on sensitive jobsites
• FSK vapor barrier facing included with integrated 2-inch stapling tab for mechanical fastening
• 2.333-inch thickness provides thermal and acoustical performance on exterior duct surfaces
• 48-inch width and 75-foot roll length reduce seam count and speed installation on long duct runs
• Lightweight and highly resilient construction simplifies handling and cutting in tight spaces

Compatibility

Designed as an OEM-style blanket wrap for the exterior of rectangular and round sheet metal HVAC ductwork in residential and light commercial systems where thermal insulation and vapor control are required.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal mechanics in accordance with SMACNA guidelines and applicable local mechanical codes. Power down the air handling system before working on or around duct sections. Secure the FSK facing with mechanical staples through the stapling tab and seal all laps and seams with listed FSK tape to maintain the vapor barrier integrity. Avoid compressing the insulation below its rated thickness, as compression reduces thermal performance.

Technical Specifications

• Width: 48 inches
• Thickness: 2.333 inches
• Roll Length: 75 feet (900 inches)
• Weight: 41.94 pounds
• Facing: FSK (Foil-Scrim-Kraft) with 2-inch stapling tab
• Fiber Type: Glass fiber
• Binder: Formaldehyde-free white resin

Standard Information

• Brand: JOHNS MANVILLE
• Manufacturer Part Number: DW-48X75X2.2F-75