Flexduct 2020 Insulated Flex Duct 20in X 25ft R-4.2

Product Description

The FLEXDUCT 2020 is an insulated flexible duct section measuring 20 inches in diameter and 25 feet in length, rated at R-4.2 thermal insulation. Designed for use in residential and light commercial HVAC air distribution systems, it connects supply air plenums, boots, and diffusers where rigid ductwork is impractical. The R-4.2 insulation jacket reduces heat gain and heat loss in unconditioned spaces such as attics and crawlspaces. HVAC technicians and sheet metal installers work with this product during new construction and retrofit duct runs.

This flexible duct is suited for supply and return air applications in forced-air heating and cooling systems. Its large 20-inch diameter makes it appropriate for high-volume trunk or branch runs in residential systems or light commercial applications where substantial airflow capacity is required. The 25-foot length provides enough material to complete most single-run installations without a field splice.

Key Features

• 20-inch inner diameter supports high-volume airflow in large trunk or branch runs
• 25-foot length reduces the need for mid-run splices and couplings
• R-4.2 insulation jacket limits thermal losses in unconditioned attic and crawlspace installations
• Flexible construction allows routing around obstructions and structural members
• Insulated jacket also provides basic condensation resistance in humid environments

Compatibility

Designed as an OEM-style replacement and new-installation flexible duct section for residential and light commercial forced-air HVAC distribution systems requiring a 20-inch diameter insulated duct.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with SMACNA guidelines and local mechanical codes. Power down and lock out the air handler or furnace before making duct connections. Secure each end with approved draw bands or sheet metal screws and seal all connections with UL 181-listed mastic or tape. Avoid sharp bends that reduce inner diameter and increase static pressure drop across the run.

Technical Specifications

• Inner Diameter: 20 inches
• Length: 25 feet
• Insulation R-Value: R-4.2

Standard Information

• Brand: FLEXDUCT
• Manufacturer Part Number: 2020