Front Flange
Medium-Duty Backdraft Dampers
- Features
- Documents
- Front Flange install type backdraft dampers are manufactured with a 1 7/8″ (47.6 mm) flange at the front and a 5/8″ flange at the back.
- ¼” (6.4 mm) is deducted from the opening dimensions to allow for clearance. This affects the effective flange.