Flex duct is a flexible, insulated tube used for air distribution that consists of a wire coil covered by a durable plastic liner and fiberglass insulation. It is the most common choice for Mobile Home applications because it can be easily snaked through tight crawlspaces and around structural beams. While easy to install, it must be kept taut and free of sharp bends to maintain proper airflow to your Air Handlers. You can find various diameters of high-R-value flex duct in our Accessories-Kits collection. Improperly installed flex duct is a leading cause of high static pressure and poor cooling performance in Ducted systems. Our ACIq systems perform best when the flex duct is sized correctly for the room's CFM requirements. It provides a cost-effective and lightweight alternative to traditional sheet metal ductwork. Regular inspection for tears or animal damage is vital for maintaining the energy efficiency of your home.