Everyone has a fresh air requirement of around 30 cubic meters per hour – but this does not come into the apartment by itself. In addition, pollutants from PCs, printers or textiles often pollute our indoor air. Anyone who likes to take long, hot showers or hang up laundry indoors fills their room with moisture, which not only affects their own well-being, but also affects the walls and promotes mold. Regular and correct ventilation is therefore essential for healthy living . But how do you ventilate properly? Tilt the window or open it completely? How long does the shock ventilation take? Read the answers here.
The big table for correct ventilation
|DOs when airing||DON’Ts when airing|
|Ventilation: Open the window fully four times a day and then ventilate for a short period of time, depending on the season: 5 minutes in winter, 10 to 15 minutes in autumn and spring, around 20 minutes in summer, and in really hot temperatures or in midsummer even up to 30 minutes.||Wasting energy: If you ventilate the room for a long time or leave the window open, it is better to switch off the heating.|
|Leave the window tilted at night: Your body releases a particularly large amount of fluid at night. In order to regulate this, it is advisable to keep the windows in the bedrooms tilted at night, at least when the temperatures are warm||Support mold: Condensation on the windows can be a sign of insufficient ventilation. The fogged windows indicate that the humidity in the room is very high, which promotes the formation of mold.|
|Ventilate in the morning and evening: If you are not at home during the day, for example because of work, you should try to ventilate the room at least three times in the morning and evening and otherwise let fresh air in more often at the weekend.||Place furniture right next to the wall: Moisture settles in cooler rooms in particular – in winter, for most people, this is the bedroom. So that there is no condensation here, you should set up the furniture about 10 cm away from the wall.|
|Ventilate thermally insulated houses for longer: If your home is insulated , you have to ventilate it longer because there is no air exchange through leaks in the walls. Of course, good insulation is still highly recommended.||Overheating: In winter, many people tend to turn the heating up even more after airing the room to compensate for the ingress of cold. This is not a good idea, however, as the room temperature will adjust itself again. Overheating ultimately increases air pollution due to the increased concentration of pollutants and dust, and your mucous membranes dry out more quickly.|
|Use the darkness in midsummer: When it gets really hot, it is advisable to air the room longer before sunrise and after sunset, since the outside temperatures are still the coolest here||Ventilate basement rooms during the day in summer: Warm air on the cold basement walls leads to moisture precipitation particularly quickly, which in turn promotes mold growth.|
|Air the bathroom and kitchen more often: You should air the bathroom and kitchen more often, especially after showering or cooking. These rooms are usually the most humid and therefore particularly susceptible to mould.||Drying laundry in the apartment: Of course, laundry that is still wet releases a lot of moisture and thus reduces the air quality. If there is no other way: ventilate additionally.|
|Cross ventilation: When ventilating, open the windows and doors in several rooms at the same time so that the stale air and moisture are transported out by the draft.||Ventilate against the ventilation system: If there are ventilation systems in the apartment, you should not ventilate additionally manually, as this wastes energy. However, if such a system is only installed in the bathroom, for example, the other rooms must of course be ventilated as usual.|
|Air new buildings more often: Do you live in a new building or was your house recently renovated? Then you should ventilate particularly often, since in both cases there is still moisture in the building. If you follow this rule, this should disappear after one to two years.||Switching off the heating while airing : If you only air out for a short time, you should under no circumstances switch off the heating during this time, as reheating the room wastes significantly more energy than maintaining a temperature.|
|Don’t forget to ventilate even when it’s raining: the outside air is fresher and, despite the rain, usually drier than the stale air in the room.||Use a humidifier: The purchase of a humidifier is basically superfluous. The air in the room is usually too humid anyway and is also warmed up and humidified in our bronchi and lungs at the latest. The exception to this is, of course, the case that you suffer from health problems.|
|Ventilate with a tilted window in winter: If you ventilate with a tilted window, it takes up to an hour for the air in the room to be completely exchanged. Meanwhile, the walls and ceiling cool down. Bringing the room back to a comfortable temperature costs a lot of unnecessary energy. Wasting energy: If you ventilate the room for a long time or leave the window open, it is better to switch off the heating.|
So if you want to do something to counteract the formation of mold in your own four walls and also want to do something for your health, you should definitely try the tips explained above.