Volume Control & Relief Dampers

Back Draft Damper

The Holyoake Model BDE is a light duty pressure relief damper constructed of extruded aluminium. It operates at low opening pressure differential and with minimal leakage when closed against reverse flow.

  • Vertical or horizontal mounting.
  • Vinyl blade edge seal.
  • Linked blades to avoid flutter.
  • Gravity operation.
  • Tension springs can be used to provide adjustable resistance to airflow.
Revit Files