Mueller Streamline 180695 Flex Duct 8 in R-4.2 25 Ft

Product Description

The MUELLER STREAMLINE 180695 is a commercial-grade flexible HVAC duct designed for supply and return branch runs in commercial air distribution systems. Built with a metalized outer jacket and a durable inner core, this flex duct delivers reliable airflow containment with an R-4.2 insulation value. The 8-inch diameter suits medium to large branch runs where both airflow capacity and thermal performance are required. Licensed HVAC technicians and sheet metal contractors install this product during new construction and retrofit work on commercial rooftop and split systems.

This flex duct is suited for commercial HVAC applications including supply branch takeoffs, return air plenums, and trunk-to-register runs in light commercial buildings. The 25-foot length reduces the number of connections needed on longer runs, minimizing potential leak points and installation time. The 8-inch diameter is a common commercial branch size used in systems serving conference rooms, retail spaces, and open office environments.

Key Features

• R-4.2 insulation value reduces heat gain and loss in unconditioned spaces such as attics and ceiling plenums
• Metalized outer jacket provides durability and resistance to tearing during installation and service
• 8-inch diameter accommodates medium to large commercial branch duct runs
• 25-foot continuous length minimizes field splices and reduces potential air leakage points
• Flexible construction allows routing around obstructions without sheet metal fabrication

Compatibility

Designed as a commercial-grade flexible duct replacement and new-installation option for 8-inch branch duct applications in commercial HVAC air distribution systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal contractor in accordance with SMACNA flexible duct installation standards and local mechanical codes. Power down the air handling unit and verify zero airflow before connecting or repositioning flex duct sections. Avoid sharp bends and compressed runs, as excessive flex duct sag or kinking significantly increases static pressure and reduces system airflow. Secure all connections with approved clamps and mastic or UL 181B-listed tape rated for the application.

Technical Specifications

• Diameter: 8 inches
• Insulation R-Value: R-4.2
• Length: 25 feet
• Jacket Type: Metalized
• Application: Commercial HVAC

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: 180695