Single panel exhaust shutter manufactured from 19-gauge galvanized steel frame 3" deep with 1-5/8" flange. For quiet operation aluminum blades have felted edges. The damper is designed for use with 2VLD ventilator models.
For direct drive and belt drive prop axial wall ventilators
Blades open when ventilator comes on, close when airflow stops
Galvanized 19-gauge steel frame, 3" deep with 1-1/2" flange
Aluminum blades have felted edges for quiet operation