Flexduct 860 Flex Air Duct R-6 9 Inch X 25 Foot Uv Black

Product Description

The FLEXDUCT 860 is a UV-inhibited fiberglass flexible air duct rated at R-6 insulation, measuring 9 inches in diameter and 25 feet in length. Designed for residential and light commercial HVAC distribution systems, it provides thermal insulation around the inner duct core to reduce heat gain and heat loss in air delivery. The black outer jacket resists UV degradation, making it suitable for installations where incidental sunlight exposure occurs, such as attic or crawlspace runs. HVAC technicians use this duct to connect air handlers, plenums, and diffusers where rigid sheet metal is impractical.

This flex duct is well suited for residential forced-air heating and cooling systems, as well as light commercial applications requiring R-6 thermal performance. Typical installations include attic duct runs, trunk-to-register branches, and supply or return connections where flexibility is needed to navigate around framing or obstructions. The 25-foot length covers most standard branch runs without splicing. The 9-inch diameter suits higher-volume supply or return trunk branches in residential systems.

Key Features

• R-6 fiberglass insulation reduces heat transfer in unconditioned spaces
• UV-inhibited black outer jacket extends service life in attic and exposed installations
• 9-inch diameter accommodates high-volume branch or trunk duct runs
• 25-foot length minimizes the need for mid-run splices or couplings
• Flexible construction allows routing around framing, joists, and obstacles

Compatibility

Designed as an OEM-style replacement and new-installation flex duct for residential and light commercial forced-air HVAC distribution systems requiring a 9-inch diameter R-6 insulated flexible duct.

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 the air handler and close the system before making duct connections. Flex duct must be fully extended without compression or sharp bends to maintain rated airflow and insulation performance. Secure all connections with approved duct clamps or ties and mastic sealant or UL 181B-listed tape — never use standard cloth duct tape.

Technical Specifications

• Insulation Rating: R-6
• Diameter: 9 inches
• Length: 25 feet
• Insulation Material: Fiberglass
• Outer Jacket: UV-inhibited black

Standard Information

• Brand: FLEXDUCT
• Manufacturer Part Number: 860