Heavy Duty Aluminum Wall Exhaust Shutter With Sure Fire Backdraft Damper Built Solid For Straight Up Industrial Workflow And Zero Headache Maintenance

Durable Aluminum Wall Air Vent With Spring Backdraft Valve
✔️ 51 by 51 In Aluminum Shutter Measures 5 75 In Deep Single Pack

This single unit heavy duty aluminum exhaust shutter locks shut when your fan stops running, using a built flip damper to stop cold drafts from sneaking through your walls.

✅ Made in USA factory run for tight tolerances
✅ 51 by 51 Inch frame wraps a 48 Inch fan perfectly
✅ Handles up to 2500 FPM airflow without flexing
✅ Spring loaded flip valve shuts out wind and pests
✅ Lightweight aluminum build resists rust fast

💡 What is the best way to size an industrial exhaust wall damper properly
This handy sizing rule keeps your shop breathing clean air while matching your duct geometry to the wall opening.
- Measure the clear wall gap and subtract half inch to let the metal frame slide home snug
- Check the static pressure rating if you push hard air through long mainline runs
- Verify the blade material matches your moisture zone to skip early pitting and grind
- Match the free area math to your fan curve to dodge motor strain and torque loss

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