Influence of wind and thermal updraft on ventilation

What most people don't know: Wind is still the most natural, clean and cost-effective driving force for home ventilation.

Even though wind doesn't always exert a constant level of force, it is a perfect guarantee for continuous ventilation of houses and apartments. Regel-air® window vents are primarily used for cross ventilation. This means that air flows into the building on the upwind side (windward side). Negative pressure is generated on the downwind side (leeward side), ensuring that moist air is carried away. From the graphic, it can be seen that the negative pressure (pull) is stronger than the positive pressure on the windward side.