The Flexflow Elbow (patent pending) ensures that a flexible duct connection to a diffuser maintains its proper shape for maximum airflow, says the company. It works as a brace to hold ductwork in place, forming the flex duct into a 90-degree elbow. The elbow fits over the outside of the duct at diffusers and round taps, using an adjustable strap similar to a zip tie. One size fits ducts from 6 to 16 inches. It is UL listed for use in return-air plenums.
Thermaflex, a division of Flexible Technologies Inc., P.O. Box 888, Abbeville, SC 29620; 800-459-4822; email@example.com; www.wereflexible.com.