Flexduct 80SERIESBAG Flex Air Duct 4 in X 25 Ft R-6

Product Description

The FLEXDUCT 80SERIESBAG is a flexible air duct section designed for residential and light commercial HVAC distribution systems. Constructed with a rip stop foil outer jacket, this duct section resists tearing during handling and installation, helping maintain system integrity once in service. At 4 inches in diameter and 25 feet in length, it provides a full run of pre-insulated flex duct in a single bag. The R-6 insulation rating reduces thermal loss along duct runs, supporting system efficiency in both conditioned and unconditioned spaces such as attics and crawlspaces. HVAC technicians and installers use this product to branch supply air from plenums or trunk lines to diffusers and registers.

This flex duct is suited for residential forced-air heating and cooling systems and light commercial applications where flexible duct runs are required. Typical installations include attic runs, dropped ceiling spaces, and wall cavity connections where rigid duct is impractical. The silver foil outer jacket also provides a vapor retarder layer appropriate for humid or unconditioned installation environments. No specific compatible equipment models were provided in the product data; suitability should be verified against the system design and local mechanical code requirements.

Key Features

• 4-inch diameter x 25-foot length provides a full pre-insulated run in one section
• R-6 insulation value reduces heat gain and loss in unconditioned spaces
• Rip stop foil outer jacket resists puncture and tearing during installation
• Silver foil jacket serves as a vapor retarder in humid environments
• Pre-insulated construction eliminates the need for separate duct wrap on flex runs

Compatibility

Designed as an OEM-style flexible duct section for use in residential and light commercial forced-air HVAC distribution systems requiring 4-inch supply or return branch runs.

Installation Notes

Flexible duct installation should be performed by a licensed HVAC technician in accordance with ACCA Manual D and applicable local mechanical codes. Support the duct at intervals specified by code to prevent sagging, which increases static pressure and reduces airflow. Secure all connections at collars and fittings with approved metal duct straps and mastic sealant or UL 181B-rated tape before closing any ceiling or attic access. Avoid sharp bends that exceed the minimum bend radius, as kinking will significantly restrict airflow.

Technical Specifications

• Diameter: 4 inches
• Length: 25 feet
• Insulation R-Value: R-6
• Jacket Type: Rip Stop Foil
• Jacket Color: Silver

Standard Information

• Brand: FLEXDUCT
• Manufacturer Part Number: 80SERIESBAG