Mueller Streamline 16KMR6 Flex Duct 16 Inch R-6 25 Ft

Product Description

The MUELLER STREAMLINE 16KMR6 is a large-diameter foil-jacket flexible duct rated at R-6 insulation, supplied in a 25-foot length. It is built for high-volume air distribution in ducted HVAC systems where flexible routing around structural obstacles is required. The foil outer jacket protects the insulation layer and resists moisture, while the R-6 rating reduces heat transfer along the duct run. This product is installed by licensed HVAC technicians and sheet metal contractors working on both new construction and retrofit projects that demand a larger-diameter flex duct with above-code insulation performance.

The 16KMR6 is suited for trunk-to-branch and main supply runs in applications where a 16-inch diameter duct is specified. Its R-6 insulation value meets or exceeds many local energy codes that require enhanced duct insulation in unconditioned spaces such as attics, crawlspaces, and mechanical rooms. Commercial light-construction systems that call for flexible large-bore duct runs are a common install scenario for this product.

Key Features

• 16-inch diameter supports high-volume airflow in large supply or return runs
• R-6 insulation rating reduces heat gain and heat loss along the duct length
• Foil outer jacket provides moisture resistance and durable outer protection
• 25-foot length reduces the number of joints needed on long runs
• Flexible construction allows routing around joists, beams, and other obstructions

Compatibility

Designed as an OEM-style replacement or new-installation flex duct for 16-inch collar fittings in residential and light-commercial ducted HVAC systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal contractor in accordance with SMACNA flexible duct installation standards and applicable local mechanical codes. Shut down and lock out the air handling unit before connecting or disconnecting duct sections. Avoid sharp bends that reduce the duct's effective diameter and restrict airflow; maintain bend radii per the manufacturer and ACCA guidelines. Secure both ends with approved draw bands and mastic or UL 181B-listed tape — do not use standard cloth duct tape.