Quietflex 9MR8 Flexible Duct Silver Sleeve R-8.0 9 in

Product Description

The QUIETFLEX 9MR8 is a flexible duct sleeve with an R-8.0 insulation rating, designed for residential and light commercial HVAC air distribution systems. Sold in a box containing 75 feet total across 15 individual pieces, each piece runs 5 feet in length. The silver sleeve construction provides a durable outer jacket suitable for supply and return air applications in conditioned spaces. HVAC technicians install this product as part of a ducted forced-air system where flexible duct runs are required between trunk lines and diffusers or grilles.

This flexible duct sleeve is suited for residential forced-air heating and cooling installations, as well as light commercial applications requiring code-compliant insulated flexible duct. The 9-inch diameter accommodates common supply trunk branch connections. Each box yields 75 feet of total run length, making it practical for multi-room duct layout projects. The R-8.0 insulation value meets energy code requirements in most jurisdictions where high-performance duct insulation is mandated.

Key Features

• R-8.0 insulation rating meets high-performance energy code requirements for flexible duct
• 9-inch diameter fits standard branch and trunk takeoff connections
• Box contains 15 pieces at 5 feet each for a total of 75 feet per box
• Silver sleeve outer jacket provides a finished, durable exterior surface
• Flexible construction allows routing around framing and other obstructions

Compatibility

Designed as an OEM-style flexible duct sleeve for use in residential and light commercial forced-air HVAC distribution systems requiring a 9-inch diameter insulated flexible duct with R-8.0 insulation.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with applicable mechanical codes and ACCA Manual D duct design guidelines. Power down the air handling unit and close the system before connecting or replacing flexible duct sections. Avoid sharp bends and excessive compression of the duct sleeve, as both reduce airflow and effective insulation value. Secure all connections at takeoffs and diffusers with approved clamps and mastic or metal tape per local code requirements.

Technical Specifications

• Diameter: 9 inches
• Insulation Rating: R-8.0
• Piece Length: 5 feet
• Pieces Per Box: 15
• Total Length Per Box: 75 feet
• Outer Jacket: Silver sleeve

Standard Information

• Brand: QUIETFLEX
• Manufacturer Part Number: 9MR8