Quietflex 85seriesbag R8 Flex Duct 8 in X 25 Ft Bagged

Product Description

The QUIETFLEX 85seriesbag is a Series 85 flexible air duct supplied in a bagged format, measuring 8 inches in diameter and 25 feet in length with an R8 insulation rating. It features a metallic polyester vapor barrier jacket with rip-stop scrim reinforcement for added tear resistance during handling and installation. The insulation core uses Johns Manville formaldehyde-free fiberglass, and the inner core is galvanized metal. The oversized core design allows it to seat properly on standard collars and register boxes. HVAC installers and sheet metal contractors use this duct in residential and light commercial forced-air distribution systems.

This flexible duct is suited for residential and commercial HVAC supply and return air applications where a high R-value insulated duct is required. The 8-inch diameter fits common trunk-line branch connections and main supply runs. Its weather-resistant packaging makes it practical for job-site storage. The rip-stop jacket holds up to the typical handling and bending that occurs during installation in attics, crawlspaces, and wall cavities.

Key Features

• R8 insulation rating using Johns Manville formaldehyde-free fiberglass
• Metallic polyester vapor barrier with rip-stop scrim reinforcement
• Galvanized metal inner core for structural support and airflow integrity
• Oversized core designed to fit standard collars and register boxes
• Greenguard Certified insulated construction
• Weather-resistant packaging for job-site durability

Compatibility

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

Installation Notes

Installation of flexible duct should be performed by a licensed HVAC technician or sheet metal contractor. Power down the air handling unit and shut off any associated electrical circuits before connecting or replacing duct sections. Secure all connections with approved clamps and mastic or metal-backed tape in accordance with SMACNA guidelines and applicable local mechanical codes. Avoid sharp bends that reduce airflow and keep the duct as straight as possible to maintain rated system efficiency.

Technical Specifications

• Diameter: 8 inches
• Length: 25 feet
• Insulation R-Value: R8
• Jacket Material: Metallic polyester vapor barrier with rip-stop scrim
• Core Material: Galvanized metal
• Insulation Material: Johns Manville formaldehyde-free fiberglass
• Certifications: Greenguard Certified, HUD/FHA 515.2.1 Paragraph B, NFPA 90A and 90B, BOCA

Standard Information

• Brand: QUIETFLEX
• Manufacturer Part Number: 85seriesbag