Mueller Streamline 10KMR6 Flex Duct 10 in R-6 25 Ft

Product Description

The MUELLER STREAMLINE 10KMR6 is a flexible insulated HVAC duct designed for residential and light commercial air distribution systems. It features a foil jacket exterior and R-6 insulation to limit heat gain and heat loss across supply and return runs. At 10 inches in diameter and 25 feet in length, this duct accommodates higher-volume airflow paths where flexible routing around joists, beams, or mechanical obstructions is required. HVAC technicians and sheet metal contractors install this product in forced-air systems where rigid duct is impractical or where last-leg flexibility is needed between a plenum or trunk line and a diffuser boot.

This flex duct is suited for residential forced-air heating and cooling systems as well as light commercial applications. The 10-inch diameter makes it appropriate for main supply or return branch runs where airflow demands exceed the capacity of smaller-diameter flex duct. It is commonly routed through unconditioned attics, crawl spaces, and interstitial ceiling cavities. The R-6 insulation value meets or exceeds the minimum duct insulation requirements found in many state and local energy codes for unconditioned space installations.

Key Features

• R-6 insulation rating reduces thermal transfer in unconditioned spaces
• Foil jacket exterior provides a durable outer layer suitable for attic and crawl space installs
• 10-inch diameter supports high-volume supply and return branch applications
• 25-foot length allows single-run installation without mid-run splicing on most branch runs
• Flexible construction simplifies routing around structural members and mechanical obstructions

Compatibility

Designed as an OEM-style replacement or new-installation flex duct for residential and light commercial forced-air HVAC systems requiring a 10-inch diameter, R-6 insulated flexible duct section.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with SMACNA flexible duct installation guidelines and applicable local mechanical codes. Power down the air handler or furnace and verify the system is de-energized before cutting into existing ductwork. Flex duct must be fully extended without compression or sharp bends to maintain rated airflow and insulation performance. Secure connections at both ends with approved metal bands and mastic or UL-listed tape rated for duct use.