Hart Cooley 51329 Insulated Flexible Duct R-6 10 Inches X 25 Feet

Product Description

The Hart Cooley 51329 is a 10-inch diameter, 25-foot insulated flexible duct designed for residential and light commercial HVAC applications. It is built to move conditioned air efficiently from the air handler or plenum to supply registers throughout a duct system. HVAC technicians and installers rely on flexible duct like the 51329 when connecting branch runs to diffusers, navigating around framing, and completing layouts where rigid duct is not practical. The R-6.0 insulation value meets current energy code requirements in most jurisdictions, helping reduce heat gain or loss as air travels through unconditioned spaces such as attics, crawlspaces, and mechanical rooms. The insulation is formaldehyde free, which supports better indoor air quality and compliance with low-emission building standards. The outer jacket is a metalized polyester film reinforced with a fiberglass scrim layer. This construction resists punctures, tears, and moisture intrusion while maintaining a vapor barrier around the insulated core. The inner core is a double-ply black polyester film supported by a helical wire coil. The double-ply design adds durability and helps the duct hold its round shape under normal installation tension and compression. The wire coil allows the duct to flex, bend, and extend without collapsing the airway, which is critical for maintaining airflow and system static pressure. This product is UL listed, confirming it has been independently tested and meets recognized safety and performance standards for flexible air ducts used in HVAC systems. It ships in a box for easy handling and storage on the job site.

• R-6.0 formaldehyde free insulation meets current energy codes for unconditioned space applications
• Metalized polyester outer jacket with fiberglass scrim provides puncture resistance and vapor barrier performance
• UL listed double-ply black polyester inner core with helical wire coil maintains round shape and airflow

Product Highlights

The Hart Cooley 51329 delivers a 10-inch by 25-foot insulated flexible duct solution with R-6.0 insulation and a durable metalized jacket, making it a dependable choice for branch duct runs in residential and commercial HVAC installations.

Product Information

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 51329

Technical Specifications

• Diameter: 10 inches
• Length: 25 feet
• Insulation R-Value: R-6.0
• Core Type: Double Ply Black Polyester
• Outer Jacket Material: Metalized Polyester with Fiberglass Scrim
• Application: HVAC
• Type: Venting
• Certifications: UL Listed
• Package Type: Boxed