Answer: the air extractors capture the stale air in humid rooms and renew it via ventilation grilles near the windows.
The point mechanical ventilation (VMP) is composed on the one hand, of extractors of air which capture the stale air in the humid rooms: kitchen, laundry and bathroom. They should be placed as high as possible, near the ceiling. And on the other hand, independent aerators that we have where we want in these same rooms, as low as possible opposite the extractors. The extracted air is naturally renewed via ventilation grilles near the windows. Unlike CMVs that operate continuously, the MPV is intermittent: it must be operated by hand or in combination with lighting. It can also be triggered automatically with humidity sensors adjusted to start the start of the VMP beyond a certain threshold. You too, send us your brico question