Quietflex 10KMR8 Flexible Duct 10 Inch R-8 25 Foot

Product Description

The QUIETFLEX 10KMR8 is a foil-jacketed flexible duct designed for residential and commercial HVAC air distribution systems. It ships in a 25-foot length with a 10-inch diameter inner core and carries an R-8 insulation value, making it suited for runs where minimizing heat gain and loss is a priority. The outer jacket is a tear-resistant foil laminate that acts as a moisture barrier, protecting the insulation layer from condensation and physical damage. The flexible inner core maintains smooth airflow while conforming to routing constraints in framed walls, crawl spaces, and mechanical rooms. Licensed HVAC technicians and sheet metal contractors are the primary installers.

This flexible duct is used in both supply and return trunk-to-register runs in forced-air systems. The 10-inch diameter accommodates higher-volume branch runs typical in larger residential zones or light commercial air handlers. The R-8 insulation value meets or exceeds energy code requirements in many climate zones, making it a common specification for new construction and retrofit projects where duct runs pass through unconditioned spaces such as attics or crawl spaces.

Key Features

• R-8 insulation value for reduced heat transfer across duct runs
• 10-inch inner diameter supports high-volume supply and return applications
• 25-foot length reduces the need for mid-run connections
• Tear-resistant foil jacket provides a durable moisture barrier
• Flexible inner core allows routing around framing and obstructions
• Sound-dampening construction reduces airborne noise transmission

Compatibility

Designed as an OEM-style replacement and new-installation flexible duct for residential and light commercial forced-air HVAC systems requiring a 10-inch diameter, R-8 insulated flex duct connection.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with SMACNA flexible duct installation standards and applicable local mechanical codes. Power down the air handler and close the system dampers before connecting or disconnecting duct sections. Avoid sharp bends that compress the inner core, as restricted cross-sections reduce airflow and system efficiency. Secure both ends with approved metal bands or clamps and seal with listed mastic or foil tape rated for flexible duct applications.

Technical Specifications

• Inner Diameter: 10 inches
• Length: 25 feet
• Insulation R-Value: R-8
• Jacket Type: Foil laminate

Standard Information

• Brand: QUIETFLEX
• Manufacturer Part Number: 10KMR8