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    Triangle IWS39: 43" x 43" Industrial Exhaust Shutter ID

    Triangle IWS39: 43" x 43" Industrial Exhaust Shutter ID

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    Maximize your industrial ventilation efficiency with the genuine Triangle IWS39 43" x 43" Industrial Exhaust Shutter ID.

    Designed for heavy-duty use, the IWS39 ensures optimal airflow control and protection for your exhaust fan system. This unit features:

    • Durable, extruded aluminum blades.
    • Robust, bronze finish, polyester powder-coated, welded galvanized steel frame for superior longevity.
    • Inside dimension of 43" x 43" for compatibility with large industrial fans.
    • Bronze pivot bushings for smooth, quiet, and maintenance-free performance.

    Ideal for outside wall or fan housing mounting in demanding commercial and industrial spaces, the Triangle IWS39 effectively prevents backdraft while maintaining optimal air quality. Choose Triangle for reliable, high-quality air movement accessories.

    Built to Your Space

    Quote required — we confirm configuration, availability, and freight before purchase. Most quotes are answered within one business day.

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    Need help choosing? Our industrial fan experts are available to help you find the perfect solution. Call us at (888) 864-4344 or use our Fan Finder.

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