Natural ventilation is considered one of the oldest methods of air exchange for rooms for various purposes. So, for example, the ventilation of the Pantheon - the greatest temple - was carried out in this way. As a rule, natural ventilation involves the circulation of air masses as a result of temperature differences outside and inside. An important provoking factor is the gradation of atmospheric pressure in accordance with the height of the structure, as well as continuous wind fluctuations.
Ventilation of industrial buildings, residential structures, arranged in this way, has several advantages compared with forced systems. Among these advantages, it should be noted several of the most significant.
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To ensure exhaust from the room, an opening is cut into the wall of the outlet channel into which the intake mesh is built. The lower part of each ventilation duct is equipped with a typical sealed inspection flap. Due to this, it becomes possible to remove all unnecessary.
Supply ventilation installation is necessary for fresh air to enter the room. In this system, risers (channels) can be made in the same way as exhaust ducts.