Flexduct 965C Flex Air Duct R-8 9 Inch X 25 Foot

Product Description

The FLEXDUCT 965C is a UV-inhibited, fiberglass-insulated flexible air duct rated at R-8 and sized at 9 inches in diameter by 25 feet in length. It is designed for residential and light-commercial HVAC distribution systems where high thermal performance and resistance to UV degradation are required. The black outer jacket resists breakdown from incidental UV exposure during storage or installation in exposed attic or crawlspace environments. Licensed HVAC technicians and mechanical contractors install this duct as part of forced-air supply and return systems.

This flex duct is suited for residential split systems, heat pumps, and gas furnace installations where flexible duct runs are required between the air handler or plenum and supply registers. The R-8 insulation value meets or exceeds energy code requirements in many climate zones, making it a common choice for attic duct installations where thermal loss and condensation control are priorities. Its 25-foot length accommodates most standard duct runs without splicing.

Key Features

• R-8 fiberglass insulation for high thermal efficiency in attic and crawlspace applications
• UV-inhibited black outer jacket resists degradation from light exposure during storage and install
• 9-inch diameter inner core for high-volume airflow distribution
• 25-foot length reduces the need for mid-run splices and fittings
• Flexible construction allows routing around obstructions without rigid duct fittings

Compatibility

Designed as an OEM-style replacement and new-installation flexible duct for residential and light-commercial forced-air HVAC supply and return distribution systems requiring a 9-inch diameter flex duct with R-8 insulation.

Installation Notes

Flex duct installation should be performed by a licensed HVAC technician following local mechanical codes and ACCA Manual D duct design guidelines. Power down the air handler and close the system disconnect before connecting or sealing duct sections. Secure each end with an approved clamp and UL 181B-listed mastic or tape rated for flexible duct. Avoid sharp bends, compression, or sagging runs, as these reduce airflow and system efficiency significantly.

Technical Specifications

• Diameter: 9 inches
• Length: 25 feet
• Insulation R-Value: R-8
• Insulation Type: Fiberglass
• Outer Jacket: UV-inhibited black
• Package Dimension (LxWxH): 6.75 inches

Standard Information

• Brand: FLEXDUCT
• Manufacturer Part Number: 965C