Air exhaust channels in multi-apartment houses and private houses are installed in rooms with a high risk of humidity, such as the kitchen, bathroom and toilet.
This is done to ensure that the excess humidity and odours that occur during cooking or washing do not spread in the entire housing, but are extracted from it.
In multi-apartment buildings, air, through exhaust channels, enters the vertical air extraction shafts, which discharge the extracted air onto the roof of the building.
The air flow is ensured by the difference between the height of the room and the roof outlet.
The higher the air exhaust shaft is located on the roof, the better the air draught would be.
Similarly, external conditions, such as wind, also improve or worsen the draught. If the natural ventilation of the building has insufficient draught, deflectors should be installed on air outlet channels on the roof.
They look like pipe ends of an increased diameter, which intensify the draught of the ventilation system depending on the direction of the wind.
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