Manufactured from 19-gauge galvanized steel frame 2" deep with 1" flange. For quiet operation aluminum blades have felted edges. Pre-punched conduit hole knock-out. Class 1.
Features:
Outside Flange opening: 15" x 15"
Recommended roof opening: 15-1/2" x 15-1/2"
Blades open when ventilator comes on, close when airflow stops
Galvanized 19-gauge, 2" deep steel frame with 1" flange
Aluminum blades have felted edges for quiet operation
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