Flexduct 85SERIESBAG Flex Air Duct 7 in 25 Ft R8 Silver

Product Description

The FLEXDUCT 85SERIESBAG is a 7-inch diameter, 25-foot flexible air duct rated R8, constructed with a silver foil rip-stop outer jacket. This duct is designed for supply and return air distribution in residential and light commercial forced-air HVAC systems. The R8 insulation rating helps reduce heat loss and heat gain across duct runs, improving system efficiency. The rip-stop foil construction adds durability against punctures and tears during handling and installation. Licensed HVAC technicians typically specify and install this product as part of new construction or retrofit duct system work.

This flex duct is suited for residential and light commercial applications where insulated flexible duct runs are required between supply plenums, takeoffs, and diffusers or registers. It is appropriate for attic, crawl space, and conditioned-space installations where code-compliant insulated ductwork is required. The 25-foot bag length provides enough run for most branch duct drops and lateral runs without requiring splices.

Key Features

• R8 insulation rating reduces thermal losses across duct runs
• 7-inch diameter fits standard round takeoffs and collars
• 25-foot length per bag minimizes splices on longer runs
• Rip-stop foil outer jacket resists tears and punctures during installation
• Silver foil finish compatible with standard mastic and foil tape sealing methods

Compatibility

Designed as an OEM-style flexible duct for residential and light commercial forced-air HVAC systems requiring 7-inch insulated branch duct runs with an R8 insulation value.

Installation Notes

Flexible duct of this type is installed by licensed HVAC technicians in accordance with applicable mechanical codes, including SMACNA guidelines and local jurisdiction requirements. Fully extend the duct before securing to avoid compression, which degrades airflow performance and effective R-value. Secure each end with an approved clamp and seal all connections with listed mastic or foil tape rated for HVAC ductwork. Support the duct at intervals required by the applicable mechanical code to prevent sagging.

Technical Specifications

• Diameter: 7 inches
• Length: 25 feet
• Insulation Rating: R8
• Jacket Material: Rip-stop foil
• Color: Silver
• Category: Flex Duct
• UPC: 87864000785

Standard Information

• Brand: FLEXDUCT
• Manufacturer Part Number: 85SERIESBAG