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The HART COOLEY 11000810 is a flexible duct sleeve designed for HVAC venting applications. It features a metalized polyester jacket over R-8.0 formaldehyde-free insulation, providing thermal performance suitable for residential and light commercial duct systems. The sleeve measures 10 inches in diameter and 5 feet in length, making it a practical solution for connecting or extending flexible duct runs. No core is included, so the sleeve slides over existing duct assemblies. Licensed HVAC technicians and sheet metal contractors are the primary installers of this component.
This sleeve is used in HVAC venting installations where a pre-insulated flexible duct cover is needed without a built-in core. The 10-inch diameter accommodates larger trunk or branch duct sizes common in residential and light commercial systems. The 5-foot length suits short runs, transitions, and repair sections where a full duct assembly is not required. The polyethylene material and metalized polyester jacket work together to maintain insulation integrity and resist moisture in conditioned-air distribution systems.
Designed as an OEM-style replacement sleeve for 10-inch flexible duct assemblies used in residential and light commercial HVAC venting systems.
Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with applicable mechanical codes. Power down the air handling system and confirm the duct is depressurized before beginning any duct work. Secure the sleeve ends with approved duct tape or draw bands to maintain an airtight seal. Follow local building and mechanical codes for insulation requirements and duct sealing standards.
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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