American Aldes Spring-Loaded Backdraft Dampers are available in sizes 4″, 5″, 6″, 7″, 8″, 10″, 12″, 14″ and 16″ and are sold in cases of six.


  • 20-gauge galvanized steel housing
  • Aluminum spring-loaded butterfly damper blades
  • Damper seals against EDPM rubber gasket in closed position for minimal leakage
  • Gasket designed for use in temperatures from -22°F to 180°F
  • Require from 0.04 to 0.08 in. w.g. static pressue to begin to open
  • May be installed in any position
  • The 14″ and 16″ models require adjusting spring tension if used in vertical position, with airflow down
  • The entire assembly inserts into duct for simple installation
  • Exterior foam gaskets provide a tight seal against interior surface of duct

Buy Now