

The FB218 Insulated Flex Duct (Part Number: 13102404H) is a high-quality solution for heating, air conditioning, and ventilation needs. With an impressive R Value of 8.0 and a size of 4 inches, this duct is designed to efficiently regulate airflow. The silver jacket reinforced with a fiberglass scrim ensures durability. This duct, compatible with various HVAC systems, features a double-ply black polyester core for enhanced insulation.