Hart Cooley 51333 Hc F216 Insulated Flexible Duct R6 18 Inches X 25 Feet

Product Description

The Hart Cooley 51333 is a residential-grade insulated flexible duct from the F216 series, designed for use in HVAC air distribution systems where thermal performance and long-term reliability are critical. This duct measures 18 inches in inside diameter and 25 feet in length, making it well suited for large-capacity trunk and branch runs in residential and light commercial installations. It carries an R-6.0 insulation value, which helps reduce heat gain and heat loss as conditioned air travels from the air handler or furnace to the living space. HVAC technicians, mechanical contractors, and sheet metal installers rely on this type of insulated flex duct to meet energy code requirements and maintain system efficiency across long duct runs. The silver metalized polyester jacket is reinforced with a fiberglass scrim, giving the duct added durability against tearing, puncture, and jobsite handling. The double-ply black polyester inner core is rated for 12 inches water column positive pressure and 3 quarters inches water column negative pressure, ensuring it holds its shape under the static pressures typical of residential forced-air systems. All Hart Cooley flexible duct products are performance-tested in accordance with ADC FD 72-R1 standards for static pressure and temperature performance. The polyester core is also tested for microbial resistance per ASTM D6329-98, and the vapor barrier is tested for permeation per applicable ASTM test methods. This product is UL listed and GREENGUARD listed for microbial resistance, supporting healthy indoor air quality. It arrives boxed for easy storage and handling on the job. Whether roughing in a new system or replacing aging ductwork, the Hart Cooley 51333 delivers consistent airflow, reliable insulation performance, and code-compliant construction for residential HVAC applications.

• R-6.0 insulation value reduces heat loss and heat gain in conditioned air distribution systems
• Metalized polyester jacket reinforced with fiberglass scrim for durability and puncture resistance
• UL listed and GREENGUARD listed for microbial resistance, meeting residential energy and air quality standards

Product Highlights

The Hart Cooley 51333 F216 insulated flexible duct provides R-6.0 thermal performance in an 18-inch by 25-foot format, built to meet residential HVAC installation standards with UL listing and GREENGUARD microbial resistance certification.

Product Information

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 51333

Technical Specifications

• Series: Residential F216
• Type: UL Listed Insulated Flexible Duct
• Inside Diameter: 18 inches
• Length: 25 feet
• R-Value: R-6.0
• Jacket Material: Metalized polyester reinforced with fiberglass scrim
• Core Material: Double-ply black polyester
• Positive Pressure Rating: 12 inches water column
• Negative Pressure Rating: 3 quarters inches water column
• Color: Silver
• Package Type: Boxed
• Gross Weight: 34.25 pounds
• Listings: UL Listed, GREENGUARD Listed for microbial resistance