Flexduct 2065 R-8 Flex Air Duct 20 in Diameter 25 Ft

Product Description

The FLEXDUCT 2065 is a UV-inhibited fiberglass flexible air duct with an R-8 insulation rating, designed for use in residential and light commercial HVAC distribution systems. At 20 inches in diameter and 25 feet in length, this duct handles high-volume airflow runs from supply plenums to large diffusers or branch takeoffs. The R-8 insulation value reduces thermal loss in unconditioned spaces such as attics, crawlspaces, and mechanical rooms. The black outer jacket is UV-inhibited, making it suitable for installations with incidental light exposure. Licensed HVAC technicians and sheet metal contractors are the primary installers of this product.

This flex duct is suited for supply-side air distribution in forced-air heating and cooling systems. The 20-inch diameter and 25-foot length make it appropriate for main trunk extensions, large zone runs, or high-CFM branch connections in commercial rooftop unit applications and large residential systems. It is installed in attics, dropped ceilings, and mechanical chases where a flexible, insulated duct run is required to connect rigid ductwork or air handlers to diffusers and registers.

Key Features

• R-8 insulation rating reduces thermal loss in unconditioned and semi-conditioned spaces
• UV-inhibited outer jacket provides resistance to incidental light exposure during and after installation
• Fiberglass insulation construction meets standard requirements for flexible air duct in HVAC applications
• 20-inch diameter accommodates high-volume airflow in large residential and light commercial systems
• 25-foot length reduces the need for mid-run connections on longer duct runs
• Black outer jacket aids in identifying insulation class and UV-resistance rating at a glance

Compatibility

Designed as an OEM-style flexible duct solution for use with standard 20-inch duct collars, plenums, and fittings in forced-air HVAC distribution systems.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with SMACNA flexible duct installation guidelines and local mechanical codes. Power down and lock out the air handler or furnace before connecting or disconnecting duct sections. Flex duct should be fully extended without sharp bends or compressions, as kinked or compressed sections significantly increase static pressure and reduce system airflow. Secure both ends with approved draw bands and mastic or listed duct tape rated for the application.

Technical Specifications

• Insulation Rating: R-8
• Diameter: 20 inches
• Length: 25 feet
• Insulation Material: Fiberglass
• Outer Jacket: UV-inhibited black
• Package Dimension (L x W x H): 21 inches

Standard Information

• Brand: FLEXDUCT
• Manufacturer Part Number: 2065