Hart Cooley 27833 Hc F218 R8 Flexible Air Duct 18 Inches X 25 Feet

Product Description

The Hart Cooley 27833 is an R-8.0 insulated flexible air duct designed for use in residential and commercial heating, ventilating, and air conditioning systems. This round flexible duct measures 18 inches in diameter and comes in a 25-foot length, making it well suited for large trunk runs and branch connections in HVAC installations. The duct features a metalized polyester jacket that is reinforced with a fiberglass scrim layer, providing a tough outer barrier that resists punctures, tears, and moisture vapor transmission. Beneath the jacket sits an R-8.0 insulation layer that helps minimize heat gain and heat loss as conditioned air travels through the duct. The double-ply black polyester inner core creates a smooth, durable airway that supports airflow up to 5000 CFM. HVAC technicians and sheet metal contractors rely on flexible duct like the 27833 when making transitions from rigid ductwork to diffusers, grilles, and registers. The flexible construction allows the installer to route the duct around obstructions in tight attic, crawl space, and ceiling plenum environments without the need for additional fittings. The Hart Cooley 27833 is UL Listed to UL 181 Class 1, confirming it meets factory-made air duct performance standards for pressure, flame spread, and smoke development. It also complies with ASTM C518 and ASTM E96 test standards. The duct ships in compact boxes that are easy to transport and store on a job site. Proper installation requires the duct to be fully extended and supported at manufacturer-recommended intervals to maintain rated airflow and insulation performance. This product is constructed from polyester and steel components.

• 18-inch diameter round flexible air duct with 25-foot length for large HVAC branch and trunk runs
• R-8.0 insulation with metalized polyester jacket reinforced with fiberglass scrim for thermal efficiency and durability
• UL Listed to UL 181 Class 1 and compliant with ASTM C518 and ASTM E96 standards

Product Highlights

The Hart Cooley 27833 delivers high-performance R-8.0 flexible duct in an 18-inch by 25-foot configuration, combining a reinforced metalized jacket with a double-ply polyester core to meet the demands of professional HVAC installations.

Product Information

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 27833

Technical Specifications

• Diameter: 18 inches
• Length: 25 feet
• R Value: R8
• Duct Shape: Round
• Maximum Airflow: 5000 CFM
• Insulated: Yes
• Material: Plastic, Steel
• Material Type: Polyester
• UL Listed: UL 181 Class 1
• ASTM Standards: ASTM C518, ASTM E96
• UPC: 684048278333