The apartment has a technical forced ventilation system that ensures a certain air exchange to guarantee you a good indoor climate.
In addition, adequate daily ventilation is always advisable to ensure a good indoor climate and health, but also for the proper maintenance of the apartment. It prevents high humidity, high CO2 levels, and even mold growth.
Permanently tilted window
This can be very pleasant in summer. However, as soon as the heating is turned on, it is not a good idea. This type of ventilation has no positive effect, but instead increases heating costs significantly and is also harmful to the environment.
Open windows and doors wide
It is best to open all windows and doors wide 3–6 times a day to ensure complete air exchange. This replaces the stale air in all rooms with fresh, oxygen-rich air and effectively prevents mold growth. It also has a positive effect on the immune system and effectively reduces the risk of infectious diseases.