Hart Cooley 51334 Hc F216 Residential Insulated Flexible Duct R6 20 Inch X 25 Foot

Product Description

The Hart Cooley 51334 is a UL Listed insulated flexible duct designed for residential HVAC installations. It belongs to the F216 family and delivers an R-6.0 thermal insulation rating, making it a reliable choice for supply air duct runs in homes and light commercial applications. The duct has a 20 inch inside diameter and comes in a 25 foot length, packaged in a box for easy handling and storage on the job site.

This flexible duct features a metalized polyester outer jacket reinforced with fiberglass scrim. The silver jacket resists moisture and helps maintain the insulating performance of the duct over time. The vapor barrier is tested for permeation in accordance with ASTM test methods, which helps prevent condensation buildup and protects the insulation layer. The double-ply black polyester inner core is rated for 12 inches W.C. positive pressure and 3/4 inches W.C. negative pressure, with a reduced negative rating of 1/2 inches W.C. for larger diameters between 14 inches and 20 inches.

Hart Cooley performance-tests all flexible duct products to industry standards, including ADC FD 72-R1, to verify static pressure and temperature performance. The polyester core is also tested for microbial resistance by GEI per ASTM D6329-98. This product is GREENGUARD Listed for microbial resistance, an important credential for indoor air quality on residential projects. HVAC contractors and sheet metal installers rely on this level of third-party validation to avoid costly callbacks and ensure systems perform as designed over the long term. The 51334 fits into the broader Hart Cooley flexible duct lineup alongside the R-4.2 F214 and R-8.0 F218 series, giving installers options to match the thermal requirements of each duct run.

• R-6.0 insulation value with metalized polyester jacket and fiberglass scrim reinforcement
• Double-ply black polyester core rated for 12 inches W.C. positive and 3/4 inches W.C. negative pressure
• UL Listed and GREENGUARD Listed for microbial resistance, performance-tested to ADC FD 72-R1

Product Highlights

The Hart Cooley 51334 F216 flexible duct provides R-6.0 insulation in a 20 inch by 25 foot format, combining UL listing, GREENGUARD microbial resistance certification, and ASTM-tested vapor barrier performance for dependable residential duct installations.

Product Information

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 51334

Technical Specifications

• Series: Residential
• Family: F216
• Type: UL Listed Insulated Flexible Duct
• Inside Diameter: 20 inches
• Length: 25 feet
• R-Value: R-6.0
• Jacket Material: Metalized polyester with fiberglass scrim reinforcement
• Core Material: Double-ply black polyester
• Positive Pressure Rating: 12 inches W.C.
• Negative Pressure Rating: 3/4 inches W.C. (1/2 inches W.C. for 14 to 20 inch diameter)
• Color: Silver
• Gross Weight: 38 pounds
• Package Type: Boxed
• Listings and Certifications: UL Listed, GREENGUARD Listed for microbial resistance