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Tulderhof Ventilation BV
Looyenbeemd 10
NL-5652 BH Eindhoven
Netherlands

t: +31 (0) 404 00 63 13
t: +32 (0) 14 65 86 91
f: +32 (0) 14 65 99 60
e: info@tulderhof.com


The Tulderhof combi-pressure system is a ventilation concept that creates an optimal climate for every type of free range house. The combination of the products and the right adjustments creates the perfect constant climate. Tulderhof has tested this concept for the last 3 years (since 2013) with enormous positive results.

The concept consists out of:

  • Flash 3300 air inlets
  • Air Optimizer
  • Pop hole doors
  • TW winch motor

Pop hole doors are closed (underpressure)

A normal ventilation pattern. All the inlets are divided into 2 or 3 groups on each side.

  • 1st group: inlets on which the Air Optimizer is installed
  • 2nd group: winter inlets
  • Possible 3rd group: summer inlets.
  • Air Optimizer always turned on
  • Fans on temperature curve
  • Optional: Tunnel ventilation

Pop hole doors are open (equal pressure)

A normal ventilation pattern. All the inlets are divided into 2 or 3 groups on each side.

When the pop hole doors are open the underpressure drops to zero. This might cause that there isn’t enough fresh air in the middle of the barn. The open inlets assure that passively air comes in at the sides of the house. The Air Optimizer makes sure that fresh air reaches the center of the house. All the inlets are completely open.

For more information, see leaflet on the right.