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Tunnel Shutters
Tunnel Shutters

Diversified Tunnel Shutters

Tunnel Shutters® are the optimal solution for allowing smooth laminar airflow into the house with no door turbulence—aiding with ventilation while also preventing air leaking for significant energy savings.

Diversified has simplified tunnel ventilation and extended product longevity with our Tunnel Shutters. Rather than fighting against the negative static pressure of a house or barn, Tunnel Shutters utilize the negative pressure to create a tight seal. Plus, the 2-inch-thick coated-galvanized steel shutters are insulated with foam-filled expanded polystyrene to deliver an R9 insulation value that drastically reduces energy costs.

The Tunnel Shutter’s maintenance-free rack and pinion drive system eliminates the need for cord or cable adjustments, and the innovative design allows the shutters to open to the outside–eliminating operating issues common with curtain and tunnel door systems.


Livestock, Greenhouse, Ventilation, Diversified Agriculture

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Our Tunnel Shutters feature:

  • 2-year warranty
  • Rack and pinion drive system
  • Adjustable airflow angles for directing cooled air
  • 2-inch thick galvanized steel shutter with foam-filled expanded polystyrene

Tunnel Shutter Benefits

  • Design allows for smooth laminar airflow and improved speeds, which minimizes static pressure loss and improves fan efficiency
  • 2-inch thick coated, galvanized steel shutters provide R9 insulation value for reduced energy costs
  • Maintenance-free rack and pinion drive system eliminates need to adjust control cords
  • Design uses negative air pressure to create a tight seal and reduce leaks
  • Shutters do no protrude into the house and will not interfere with operations
  • Simple, cost-effective installation saves money

Technical Specifications

Width4 foot modular units
HeightAvailable in 4 foot, 5 foot and 6 foot units; can be stacked for multi-level house installation
LengthUnits connect to provide any desired length
Installation areasMountable on outer walls, within cooling cell dog houses, indoors or outdoors
Special considerationsU-joints available for over door or over equipment installation


Tunnel Shutters Brochure


Tunnel Shutters installation instructions (PDF)

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