Triangle 61 x 61 Fan Wall-Mounted Double Panel Exhaust Shutter for 54 Inch PFG, VI, V, RV, RVI, VID Series

The Triangle IWSD54 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 61" × 61”. This shutter is intended for use with compatible industrial exhaust fans and wall-mounted ventilation systems.

The IWSD54 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.