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    Triangle RIWS21: 28" x 28" Industrial Supply Shutter ID

    Triangle RIWS21: 28" x 28" Industrial Supply Shutter ID

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    Optimize your facility's ventilation with the heavy-duty Triangle RIWS21 28" x 28" Industrial Supply Shutter ID. Engineered by Triangle, this gravity damper is an essential component for industrial intake fan systems, ensuring superior air management and climate control.

    The RIWS21 (SKU: RIWS21) features robust construction designed for demanding environments. Key benefits include:

    • Inside Dimensions: 28" W x 28" H for optimal compatibility.
    • Durable galvanized steel frame with corrosion-resistant extruded aluminum blades.
    • Automatically opens and closes to prevent backdraft, insects, and dust infiltration when the fan is off.
    • Can be paired with optional manual pull chain or electric operators for versatility.

    This reliable supply shutter ensures smooth, maintenance-free operation, maximizing the efficiency of your ventilation system.

    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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