In the first part, we calculated the required air exchange mass of the hive, which is for Warrébeute with two frames at 65 liters per hour or 0,065 m³ / h. This corresponds to 1.8 times the volume of the loot inside Warré which equipped with 36 liters liegt.Mit this value, the question arises as to the correct dimensioning of the supply and exhaust port. (Entrance hole.) How large the cross section must be so that the above desired ventilation rate and volume is achieved without the air speed degenerates into the prey to draft and is the Bien unpleasant. In pig (pigs are very sensitive to a draft) for this purpose, a maximum value of 0.2 m / s is specified. For our example, we reduce by half: 0.1 m / s, because the bees will not be on the train. But the required volume of air to be moved. For the movement of the air, especially the inner thermal (heat of Bien) and the wind from the outside as a vehicle to Verfügung.

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