Since no literature on design calculations for natural ventilation could be found, the author developed an original design method in the early nineties. He is still using the method to design areas that have to be ventilated naturally. An example of a very common application, is designing the ventilation of a transformer room and the outside air grid area necessary. A surprising result of the design of a practical situation is that it can be demonstrated on the basis of the calculations that wind speed has relatively little effect on the natural ventilation.
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