Tunnel Shutters®

Tunnel Air Technology For the 21st Century

Watch our ​Information Video for the di Vent System!

       Rack and Pinion Drive

Eliminate sticking or icing seal issues

with positive force opening or closing

The di Vent System provides a Large, R-9 Insulated Door with Three optional Drive Systems:  Standard Cable, Torque-Tube Drive, or our Rack & Pinion Drive.

di Vent Advantages

  • ​​Larger inlet opening (Up to 44" x12") & (44" x 6")
  • 2 Inch thick Solid Vent Door
  • Significant Energy Savings with R-9 Insulation value 
  • Stainless Steel 304 Corrosion Resistant Hinges
  • Promotes excellent air-flow
  • Adjustable internal Air-Baffles
  • Angled lip for added Air-throw
  • Polyurethane SF High-compression Picture Frame Seal
  • Maintenance Free Torque-tube Drive System (optional)
  • Brooding Zone Vents Automated Selection (optional)
  • Rack & Pinion Drive - Positive force Open/Close (optional)