Hart Cooley 51324 Hc F216 Insulated Flexible Duct R-6 5 Inches X 25 Feet

Product Description

The Hart Cooley 51324 is an R-6 insulated flexible duct designed for residential and commercial HVAC air distribution systems. This product is part of the HC F216 series and is built for contractors, HVAC technicians, and mechanical installers who need reliable, code-compliant flexible ductwork. The duct measures 5 inches in diameter and comes in a 25-foot length, making it well suited for connecting air handlers, plenums, diffusers, and registers in forced-air systems.

The outer jacket is constructed from a metalized polyester film reinforced with a fiberglass scrim layer. This construction provides durability against tears, punctures, and moisture while maintaining a clean, reflective surface. The inner core is a double-ply black polyester design that resists collapse under negative pressure and supports consistent airflow throughout the duct run. The insulation layer carries an R-6.0 thermal rating, which meets or exceeds energy code requirements in many jurisdictions for residential HVAC applications. The insulation is also formaldehyde free, making it a healthier choice for indoor air quality in occupied spaces.

This flexible duct is UL listed, confirming it has been independently tested and certified to meet safety and performance standards. It arrives boxed, which protects the product during storage and transport on job sites. HVAC professionals will find this duct compatible with standard 5-inch round collars on diffusers, boots, and takeoffs. It is ideal for use in attics, crawl spaces, and mechanical rooms where efficient, well-insulated duct runs are required. The Hart Cooley 51324 is a dependable choice for new construction, HVAC replacement, and system retrofits.

• Metalized polyester outer jacket reinforced with fiberglass scrim for durability and moisture resistance
• Double-ply black polyester inner core supports airflow and resists collapse under negative pressure
• R-6.0 formaldehyde free insulation meets energy code requirements and supports healthy indoor air quality

Product Highlights

The Hart Cooley 51324 delivers UL-listed, R-6 insulated flexible duct in a 5-inch by 25-foot format built for professional HVAC installation. Its metalized jacket, double-ply core, and formaldehyde free insulation make it a reliable, code-compliant solution for air distribution in residential and light commercial systems.

Product Information

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 51324

Technical Specifications

• Length: 25 feet
• Diameter: 5 inches
• Application: HVAC
• Core Type: Double Ply Black Polyester
• Material: Polyester
• Insulation: R-6.0
• Type: Venting
• Package: Boxed