Thermaflex 56314000002 Insulated Flex Duct 14in X 25ft R-8

Product Description

The THERMAFLEX 56314000002 is an insulated flexible duct designed for residential and light commercial HVAC air distribution systems. Constructed with an R-8 insulation rating, this 14-inch diameter duct ships in a 25-foot length and features a silver outer jacket. It is used to connect air handling equipment to diffusers, registers, and grilles in supply-air applications. HVAC installers and sheet metal contractors work with this product during new construction and retrofit projects where flexible duct runs are required to navigate framing, joists, and tight plenum spaces.

This flexible duct is suited for supply-air runs in forced-air heating and cooling systems. The 14-inch diameter accommodates high-volume trunk-to-branch connections in larger residential systems and light commercial applications. The R-8 insulation value meets or exceeds energy code requirements in many jurisdictions, making it appropriate for unconditioned attic, crawlspace, and mechanical room installations where thermal loss is a primary concern.

Key Features

• R-8 insulation rating reduces thermal loss in unconditioned spaces
• 14-inch inner diameter supports high-volume airflow distribution
• 25-foot length per bag allows for longer uninterrupted duct runs
• Silver outer jacket provides a durable, reflective vapor barrier
• Flexible construction allows routing around structural obstructions

Compatibility

Designed as an OEM-style replacement and new-installation flexible duct for residential and light commercial forced-air HVAC supply systems requiring a 14-inch diameter insulated duct with R-8 insulation.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with SMACNA flexible duct installation standards and local mechanical codes. Power down the air handling unit and confirm the system is de-energized before connecting or disconnecting duct sections. Avoid sharp bends, kinks, or compression of the duct core, as these conditions significantly increase static pressure and reduce airflow. Secure all connections with approved duct straps and UL-listed mastic or metal-backed tape.

Technical Specifications

• Inner Diameter: 14 inches
• Length: 25 feet
• Insulation R-Value: R-8
• Outer Jacket: Silver

Standard Information

• Brand: THERMAFLEX
• Manufacturer Part Number: 56314000002