Hart Cooley 51325 F216 Series Insulated Flexible Duct 6 Inches X 25 Ft R-6

Product Description

The Hart Cooley 51325 is an F216 Series insulated flexible duct designed for residential and light commercial HVAC air distribution systems. This round flexible duct measures 6 inches in inside diameter and extends 25 feet in length, making it a practical choice for connecting air handlers, plenums, and diffusers across a wide range of installation layouts. The duct is built with a polyester core that provides structural support while maintaining the flexibility needed to route through tight spaces, around obstructions, and between joists or trusses. The outer jacket is constructed from metalized polyester, which gives the duct its characteristic black and silver metallic appearance while also contributing to its durability and resistance to tearing during installation. An R-6 insulation rating means this duct meets or exceeds the insulation requirements specified in many local and national energy codes for supply air ductwork, helping to reduce heat gain or loss as conditioned air travels from the equipment to the living space. The operating temperature range runs from -20 degrees Fahrenheit to 140 degrees Fahrenheit, covering the full spectrum of conditions found in attics, crawlspaces, and mechanical rooms. Maximum working pressure is rated at 6 inches water column, which is compatible with standard residential forced-air systems. HVAC installers, sheet metal contractors, and mechanical technicians rely on insulated flex duct like the Hart Cooley 51325 to make fast, reliable connections where rigid duct is impractical. The F216 Series is a widely recognized product line used throughout the HVAC trade for its consistent performance and ease of installation. Each package contains one 25-foot section of duct, ready to cut and connect on the job site.

• 6-inch inside diameter, 25-foot length round flexible duct for residential and light commercial HVAC air distribution
• R-6 insulation rating meets energy code requirements for supply duct insulation in attics, crawlspaces, and conditioned spaces
• Metalized polyester outer jacket with polyester core construction handles temperatures from -20 to 140 degrees Fahrenheit

Product Highlights

The Hart Cooley 51325 F216 Series insulated flexible duct delivers R-6 thermal performance in a 6-inch by 25-foot round configuration, built for fast and reliable air distribution connections in forced-air HVAC systems.

Product Information

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 51325

Technical Specifications

• Product Family: F216 Series
• Product Type: Insulated Flexible Duct
• Shape: Round
• Inside Diameter: 6 inches
• Length: 25 ft
• R-Value: 6
• Core Material: Polyester
• Jacket Material: Metalized Polyester
• Operating Temperature Rating: -20 to 140 degrees Fahrenheit
• Maximum Working Pressure: 6 inches w.c.
• Color: Black and Silver / Metallic
• Package Quantity: 1
• Shipping Weight: 10.95 pounds
• Packaged Depth: 9.8 inches
• Packaged Height: 22.4 inches
• Packaged Width: 10.2 inches