Quietflex 8MR6 Flexible Duct Connector 8 in R-6.0 75 Ft

Product Description

The QUIETFLEX 8MR6 is an insulated flexible duct connector designed for use in residential and light commercial HVAC air distribution systems. The silver sleeve construction provides a vapor barrier and reflects radiant heat, while the R-6.0 insulation value reduces thermal loss through the duct wall. Each box contains 75 feet of flexible duct in 15 individual 5-foot pieces, giving installers manageable lengths for branch runs and transitions. HVAC technicians use this product to connect supply or return air plenums to registers, diffusers, and grilles.

This flexible duct connector is suited for supply air branch runs in forced-air systems where routing around framing, mechanical obstructions, or tight plenum spaces is required. The 8-inch diameter fits standard trunk-to-branch fittings and register boot connections common in residential new construction and retrofit applications. The 5-foot piece format also works well for short connector runs between rigid duct sections.

Key Features

• R-6.0 insulation value limits heat transfer through the duct wall in unconditioned spaces
• Silver sleeve exterior serves as a vapor retarder and reflects radiant energy
• 8-inch inner diameter fits standard round fittings, boots, and collars
• 75 feet per box in 15 pre-cut 5-foot sections for easy handling on the job

Compatibility

Designed as an OEM-style replacement and standard-fit flexible duct section for residential and light commercial forced-air HVAC systems using 8-inch round duct connections.

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 handling unit and close the system before making duct connections. Secure each end of the flex duct with an approved clamp or draw band and seal with mastic or UL-listed foil tape — never use standard cloth duct tape. Avoid sharp bends, compression, or sags in the installed run, as these conditions significantly reduce airflow and system efficiency.

Technical Specifications

• Inner Diameter: 8 inches
• Insulation R-Value: R-6.0
• Total Length Per Box: 75 feet
• Pieces Per Box: 15
• Length Per Piece: 5 feet
• Exterior Jacket: Silver sleeve

Standard Information

• Brand: QUIETFLEX
• Manufacturer Part Number: 8MR6