Hart Cooley 11000608 Flex Duct Sleeve 8 in R-6.0 5 Ft

Product Description

The HART COOLEY 11000608 is a flexible duct insulation sleeve designed for use on round flexible duct and rigid duct runs in HVAC systems. It features a metalized polyester jacket over formaldehyde-free R-6.0 insulation, delivering thermal performance that meets current energy code requirements without hazardous binder materials. At 8 inches in diameter and 5 feet in length, this sleeve slips over existing duct sections to add insulation where needed. HVAC technicians and sheet metal installers use it during new construction and retrofit applications where duct insulation must be upgraded or repaired.

This sleeve is suited for residential and light commercial HVAC applications where uninsulated or under-insulated ductwork runs through unconditioned spaces such as attics, crawlspaces, and mechanical rooms. The 8-inch diameter fits standard round duct of that size. The 5-foot section length makes it practical for short duct runs, elbows, and transitions that require individual insulation treatment rather than a full flex duct replacement. No core is included, so the sleeve installs directly over existing duct assemblies.

Key Features

• Metalized polyester jacket provides a durable, vapor-retarding outer surface
• R-6.0 insulation value meets common energy code minimums for duct insulation in unconditioned spaces
• Formaldehyde-free insulation material for improved indoor air quality compliance
• UL Classified construction for use in listed HVAC duct applications
• No-core design allows direct installation over existing round duct
• Boxed packaging protects sleeve geometry during storage and transport

Compatibility

Designed as an OEM-style insulation sleeve for standard 8-inch round flexible or rigid duct sections in residential and light commercial HVAC systems.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal workers. Power down the air handling system before working on duct assemblies. Slide the sleeve over the duct section and secure both ends with UL-listed duct tape or metal band clamps per local mechanical code requirements. Do not compress the insulation layer, as compression reduces the effective R-value of the assembly.