Thermaflex 52310000002 Flex Duct 10in X 25ft R-8

Product Description

The THERMAFLEX 52310000002 is a 10-inch diameter, 25-foot length insulated flexible air duct rated at R-8, designed for low-to-medium pressure HVAC distribution systems. The inner core is constructed from a polyester film laminated around a heavy-gauge, corrosion-resistant steel wire helix, providing structural rigidity while maintaining flexibility during installation. A thick fiberglass insulation blanket over a fiberglass scrim delivers the R-8 thermal performance. The outer jacket is a durable black polyethylene vapor barrier that resists moisture intrusion. Licensed HVAC contractors and sheet metal mechanics install this product in both new construction and retrofit applications.

This flexible duct is suited for residential and light commercial forced-air systems where branch runs connect from a trunk line or plenum to supply registers and diffusers. The 10-inch diameter accommodates higher-volume branch runs. The product is rated for use in low-to-medium pressure systems and performs across a broad temperature range of -20 degrees F to 250 degrees F, making it appropriate for heating and cooling distribution alike. The 25-foot roll length reduces the number of joints required on longer runs.

Key Features

• R-8 insulation value for high-performance thermal efficiency in conditioned-space and unconditioned-space installations
• Corrosion-resistant steel wire helix inner core maintains duct shape under pressure and during flexing
• Polyester film inner liner laminated over the wire helix for a smooth, durable airway surface
• Durable black polyethylene outer jacket serves as an integrated vapor barrier
• Rated for velocities up to 5,000 FPM and positive static pressure up to 10 inches WG (4-inch to 16-inch ID)
• 5-year manufacturer warranty

Compatibility

Designed for low-to-medium pressure forced-air HVAC distribution systems. Suitable for supply-side branch duct runs in systems requiring R-8 insulated flexible duct with a 10-inch internal diameter.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with SMACNA flexible duct installation standards and local mechanical codes. Power down the air handling unit and close the system before making duct connections. Avoid sharp bends or compressed sections that reduce airflow and thermal performance. Secure each end with an approved clamp or draw band and seal with UL 181B-listed mastic or tape rated for flexible duct applications.