Quietflex 7MR6 Flexible Duct 7 in R-6.0 75 Ft Per Box

Product Description

The QUIETFLEX 7MR6 is a pre-insulated flexible duct section designed for residential and light commercial HVAC air distribution systems. Each box contains 15 pieces totaling 75 feet of 7-inch diameter duct wrapped in an R-6.0 insulated silver sleeve. This flexible duct connects supply air plenums, trunk lines, and air handlers to diffusers and grilles, maintaining conditioned air temperature during delivery. HVAC installers use this product in attic, crawlspace, and interior ceiling cavity runs where rigid ductwork is impractical or cost-prohibitive.

This duct is suited for residential forced-air heating and cooling systems as well as light commercial ventilation applications. The 7-inch diameter and R-6.0 insulation value make it a common choice for medium-capacity branch runs off a main trunk. Each box contains 15 individual 5-foot sections, giving installers a manageable unit length for fitting around framing, beams, and other obstructions in tight spaces.

Key Features

• 7-inch diameter flexible duct for medium-capacity air distribution branch runs
• R-6.0 insulated silver sleeve reduces heat gain and loss in unconditioned spaces
• 75 feet per box (15 pieces at 5 feet each) for efficient job-site stocking
• Flexible construction simplifies routing around structural obstructions
• Silver sleeve exterior supports identification and standard duct inspection

Compatibility

Designed as an OEM-style flexible duct replacement or new-installation component compatible with standard 7-inch round duct collars and fittings used in residential and light commercial forced-air HVAC systems.

Installation Notes

Flexible duct installation should be performed by a licensed HVAC technician in accordance with ACCA Manual D and applicable local mechanical codes. Power down and lock out the air handler or furnace before connecting or disconnecting duct sections. Avoid sharp bends and excessive compression of the flex duct, as both conditions restrict airflow and reduce system efficiency. Secure all connections with approved clamps or mastic sealant and support the duct at intervals required by local code to prevent sagging.

Technical Specifications

• Diameter: 7 inches
• Insulation R-Value: R-6.0
• Total Length Per Box: 75 feet
• Pieces Per Box: 15
• Length Per Piece: 5 feet
• Sleeve Color: Silver

Standard Information

• Brand: QUIETFLEX
• Manufacturer Part Number: 7MR6