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Today's Hours 8am - 11pm estThe Triangle IWSD57 Industrial Exhaust Shutter is a heavy-duty double-panel gravity exhaust shutter designed for industrial ventilation applications where reliable airflow control and backdraft prevention are required. With a nominal size of 67" × 67”. This shutter is intended for use with compatible industrial exhaust fans and wall-mounted ventilation systems.
The IWSD57 features a welded galvanized steel frame and extruded aluminum shutter blades, providing durability and long service life in demanding commercial, industrial, and agricultural environments. The double-panel design allows smooth operation on larger openings, with blades that open automatically under airflow and close by gravity when the fan is not operating.