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The HART COOLEY 11000806 is a flexible duct sleeve designed for HVAC venting applications. Constructed with a metalized polyester jacket and polyethylene core construction, this sleeve provides R-8.0 thermal insulation performance without the use of formaldehyde-based materials. At 5 feet in length with a 6-inch diameter, it is suited for connecting flexible duct runs, lining existing duct sections, or routing conditioned air through unconditioned spaces. HVAC installers and sheet metal mechanics rely on this sleeve where a pre-insulated, coreless sleeve format is needed for efficient field assembly.
This sleeve is intended for residential and light commercial HVAC venting and air distribution systems. The coreless design allows it to be slipped over rigid or semi-rigid duct components during installation. Its 5-foot length suits typical joist-bay and short-run applications, and the metalized polyester jacket is compatible with standard duct tape and mastic sealing methods used in air-sealing work.
Designed as an OEM-style flexible duct sleeve for use in residential and light commercial HVAC venting and air distribution applications requiring a 6-inch diameter coreless sleeve format.
Installation should be performed by a qualified HVAC technician in accordance with local mechanical codes and SMACNA guidelines. Power down the air handling unit and confirm the system is de-energized before working on connected duct sections. Secure sleeve ends with approved metal draw bands and seal all joints with mastic or UL 181-rated tape to maintain system airtightness. Do not compress the insulation layer, as compression reduces effective R-value.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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