Flexmaster 1mr6.0-6 Acoustical Flex Duct R6 6in 25ft

Product Description

The FLEXMASTER 1mr6.0-6 is an acoustical flexible duct with R6 insulation, designed for low-velocity air distribution in residential and light commercial HVAC systems. The flexible core allows for routing through tight spaces, framing cavities, and attic runs where rigid ductwork is impractical. The R6 insulation rating provides thermal resistance suitable for unconditioned spaces such as attics and crawlspaces. The acoustical lining reduces airborne noise transmission between the air handler and supply registers, making it well suited for bedroom and living area applications. This duct ships in a 25-foot length and measures 6 inches in diameter.

This flexible duct is used in forced-air heating and cooling systems to connect branch runs from the plenum or trunk line to supply boots and registers. The 6-inch diameter is a common size for individual room supply runs in residential construction and retrofit work. HVAC installers use it in new construction, renovation projects, and system replacements where flexible duct is specified or preferred over rigid sheet metal branch lines.

Key Features

• R6 insulation rating suitable for unconditioned attic and crawlspace installations
• Acoustical inner lining reduces airborne noise from airflow and system operation
• 6-inch diameter fits standard 6-inch collars, boots, and flex connectors
• 25-foot length per section reduces the number of joints needed on longer runs
• Flexible core allows routing around obstructions and through framing cavities

Compatibility

Designed as an OEM-style replacement and new-installation flexible duct for residential and light commercial forced-air HVAC supply branch runs requiring a 6-inch diameter acoustical flex duct with R6 insulation.

Installation Notes

Flexible duct installation is typically performed by licensed HVAC technicians. Power down the air handler and close the disconnect before connecting to any plenum or trunk line collar. Avoid sharp bends, kinks, and compression of the duct, as these conditions significantly reduce airflow and system efficiency. Secure all connections with approved clamps or draw bands and mastic or listed tape per local mechanical codes and SMACNA guidelines.

Technical Specifications

• Diameter: 6 inches
• Length: 25 feet
• Insulation Rating: R6
• Type: Acoustical Flexible Duct

Standard Information

• Brand: FLEXMASTER
• Manufacturer Part Number: 1mr6.0-6