IWS Series Exhaust Shutters

Owner's Manual

Choose a model below to view drawing

18” IWS18

24” IWS21 IWS24

30” IWS24 IWS30

36” IWS33 IWS36 IWSD33 IWSD36

42” IWS39 IWS42 IWSD39 IWSD42

48” IWS45 IWS48 IWSD45 IWSD48

54” IWSD51 IWSD54

60” IWSD57 IWSD60

Industrial-Strength Exhaust Control for Reliable Ventilation

Keep your industrial or commercial spaces properly ventilated and help reduce backdraft infiltration with Triangle Engineering’s IWS Series Exhaust Shutters. Built for industrial ventilation needs, these shutters serve as robust industrial backdraft dampers, ensuring smooth exhaust flow while minimizing energy loss. Designed and built in the USA, they feature a welded galvanized steel frame, extruded aluminum blades, and bronze pivot bushings for low-maintenance performance, even in tough environments.

Key Benefits

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.

Applications

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.)

Technical Specifications

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)

Why Choose Triangle Engineering?

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.

QUALITYProducts.
SINCE 1948.