Atco 031 20 R8 Flexible Duct 20 in X 25 Ft

Product Description

The ATCO RUBBER PRODUCTS 031 20 is a silver polyester foil flexible duct with an R8 insulation rating, sized at 20 inches in diameter and 25 feet in length. Designed for air distribution in forced-air HVAC systems, this duct uses a foil outer jacket and polyester insulation to limit conductive and radiant heat loss through the duct wall. The R8 value meets the higher insulation threshold required in many current energy codes for ducts located in unconditioned spaces such as attics and crawlspaces. Licensed HVAC technicians and sheet metal contractors are the primary installers of this product.

This flexible duct is suited for residential and light commercial HVAC applications where large-diameter runs are needed to deliver conditioned air from the air handler or plenum to diffusers, grilles, or zone dampers. The 20-inch diameter accommodates high-volume trunk or main-line runs. Its flexible construction allows routing around obstructions in tight attic or mechanical room spaces. Installations in unconditioned attic spaces particularly benefit from the R8 insulation level, which reduces energy loss and helps systems maintain design airflow temperatures.

Key Features

• R8 insulation rating suitable for ducts in unconditioned spaces per current energy code requirements
• 20-inch diameter supports high-volume air distribution runs
• 25-foot length reduces the number of joints needed on longer runs
• Silver polyester foil outer jacket resists moisture and provides a reflective surface
• Flexible construction allows routing around structural obstructions

Compatibility

Designed as an OEM-style flexible duct replacement or new-installation component for residential and light commercial forced-air HVAC systems requiring a 20-inch diameter flexible duct with R8 insulation.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with ACCA Manual D and applicable local mechanical codes. Power down and lock out the air handler or furnace before connecting or disconnecting ductwork. Secure each end of the flexible duct with an approved duct strap and mastic sealant or UL 181B-listed tape — never use standard cloth duct tape. Avoid excessive compression or sharp bends, which reduce airflow and effective R-value.