QUALITYProducts.
SINCE 1948.

• Durability & Corrosion Resistance: A welded galvanized steel frame with a bronze finish polyester powder coating stands up to harsh conditions, making these exhaust shutters ideal for industrial and commercial settings.
• Smooth, Low-Maintenance Operation: Bronze pivot bushings keep the shutter blades moving freely without routine lubrication or frequent adjustments.
• Optimized Airflow Management: The extruded aluminum blades are specially designed to allow efficient exhaust flow while minimizing reverse drafts when fans are off.
• Flexible Configuration: Choose from single or double panel models, and enjoy simple wall or fan mounting options to fit virtually any ventilation setup.
• Proven Performance: Over 70 years of engineering expertise backs these shutters, giving you peace of mind with every installation.
• Uniform Blade Operation: Every shutter comes with a tie bar linkage to ensure consistent, simultaneous blade movement, preventing partial openings.

• Manufacturing & Industrial Facilities: Manage heat, fumes, and airborne particles effectively in production plants and workshops.
• Agricultural Buildings: Ideal for barns, livestock housing, and greenhouses, where controlling airflow and humidity is crucial.
• Warehouses & Storage Facilities: Maintain stable temperatures and help prevent outside elements from entering during non-operational hours.
• Workshops & Garages: Evacuate exhaust or welding fumes while reducing backdrafts, dust, and debris entry.

(Note: Not recommended for grease-laden air from commercial kitchen applications.)

Frame Construction

• Material: Welded galvanized steel for superior strength
• Finish: Bronze finish with a polyester powder coat for enhanced corrosion resistance

Blade Construction

• Material: 6063 extruded aluminum blades
• Design: Engineered for low airflow resistance and to help minimize backdraft infiltration

Pivot Mechanism

• Bushings: Bronze pivot bushings for smooth, low-friction movement and reduced wear
• Tie Bar Linkage: Ensures uniform blade operation so all blades open and close together, preventing partial openings

Configuration Options

• Models: Single or double panel designs for varying airflow requirements
• Mounting: Available in wall mount and fan mount configurations for easy integration

Additional Notes

• Size Range: 27 3/8″ sq up to 68 1/4″ sq models; 4″ shutter depth
• Optional Operators: manual pull chain or electric operator (115/230v 1-phase)

RIWS Supply / Intake Shutters: Designed for incoming airflow and supply air control, these shutters offer a dependable solution for industrial or commercial ventilation requirements.

3000 Series Flangless Dampers: Ideal for applications where a flangeless design is preferred, providing a streamlined intake or exhaust damper option.

3100 Series Front Flange Damper: Suited for installations where a front flange design is needed, offering secure mounting and reliable operation.

3200 Series Rear Flange Damper

3500 Series Rear Flange Damper

At Triangle Engineering, we understand the challenges of industrial ventilation. With an extensive track record of delivering robust HVAC solutions, our name is synonymous with quality and reliability. Every IWS Shutter reflects our promise to engineer industrial-grade products that deliver unmatched performance and remain reliable for years to come.

Ready to Upgrade Your Ventilation?

Contact our team today for more information or to request a quote on Triangle Engineering’s IWS Series Exhaust Shutters. Experience the perfect balance of toughness, efficiency, and industry expertise—all backed by over 70 years of proven performance.