Ventilate properly in summer and winter - leaflet

The Content Of The Article:

Modern insulation and tight windows not only trap the air, but also moisture in the home. This increases the risk of mold growth. All the more important is the targeted and correct ventilation in winter and summer. In addition to this, however, must be paid to the prevailing humidity, so that no unwanted effects. How and when should be disclosed, interested in the following. The clear information sheet helps in case of doubt, to think of the guidelines.
General guidelines as leaflet

  • Ventilate when it's cooler outside than indoors
  • Bear in mind that warm air absorbs more moisture than cold
  • Prevent frequent airing for five to ten minutes in the open window
  • Check the walls regularly for mold, especially behind large pieces of furniture
  • Check humidity with a hygrometer and regulate if necessary
  • In cool rooms, such as the basement, do without airing during the summer
  • Inhabited rooms never completely unheated during the winter
  • Adjust the ventilation time to the humidity
  • When considering the frequency of ventilation, also take into account the increased air humidity caused by pets, aquariums and foliage plants
  • Place large furniture at a distance from the wall to allow air to circulate
  • In case of mold or wet walls, despite correct ventilation, check for structural defects.
From warm to cold
Warm air can in any case absorb more moisture than cold. In order to avoid mold is therefore always only ventilated if it is warmer inside than outside. In this way warm air and moisture are removed
Airing in the summer
In summer, the lure is great to let at least oxygen in the room by frequent airing. During the day, however, this also comes in plenty of warm air. It can absorb a lot of moisture, which precipitates on the walls and thus favors mold growth. As long as it is warmer outdoors than indoors, the windows should therefore remain closed. If it cools down during the night, it should be ventilated continuously or in several bumps. As a result, the rooms can also cool down and moisture can escape. In addition, should be dried during hot temperatures no laundry in the apartment. The warm walls, too, retain the moisture and often can not adequately release it during the night. Even long showers and baths as well as continuous cooking enriches the air with water and should therefore be timed so that it can be ventilated in direct connection accordingly. As a rule, the early morning and late evening hours are ideal.
Airing in the winter
In front of open windows, many people shy away in the winter, after all, there is no heating for the environment. However, the principle is the same as in the summer. Breathing air, cooking, drying laundry and showers brings water into the air. The resulting humidity is reflected in all textiles and also in the wallpaper and even in the window seals. Here it forms an ideal reason for mold. Even if the room air is rather dry, airing in winter is important. The regular opening of the windows protects the mucous membranes, reduces the number of germs and is simply necessary for a healthy oxygen content in the air. Heating should not be neglected. Even in cool bedrooms, a lot of water is deposited through the breath alone. If the walls are still cold, the moisture will condense on them and mold will not be long in coming. At least during the day, the rooms should therefore be heated. In this way, the walls can heat up and dry off. The moisture is released into the air and is removed when ventilated.
In order not to unnecessarily increase the heating costs in winter, you should always ventilate for a short time only. Depending on the stay and use of the room, a few minutes may be enough for two to three times a day, or correspondingly more frequent ventilation may be necessary.
basement, cellar
The basement is almost always cooler in summer than the outside temperature. Airing should therefore be avoided as completely as possible and really only take place when it is cooler outside than in the underground rooms. If it is very humid in the cellar, and this must be dried, there are two measures available. On the one hand, the temperature can be increased by heating, and then ventilated. On the other hand, moisture-absorbing materials, such as cat litter, rice or salt, can be introduced and changed regularly.
Highly frequented rooms
Dog and cat breathe, the aquarium water evaporates unnoticed, the wet soil of indoor plants releases moisture into the air - the human inhabitants do not have to be present at all, so that rooms become damp. When ventilation duration and frequency these influences should be considered. It is therefore favorable to open all windows and doors at least two to three times a day for five minutes. Due to the resulting draft, the moisture can escape faster. Heavily used rooms and rooms with many plants should be ventilated even more often and, if necessary, longer.
Bathroom and kitchen
Boiling water, steam from the shower or bathtub quickly make the air in the bathroom and kitchen very humid. Often so humid that the water visibly condenses on furniture and walls. Here it is not enough to open the window for five minutes. It is cheaper, instead, already during cooking to air. Air that has gone into the air can escape directly. In the bathroom immediately after the windows were opened and wet surfaces are wiped dry. Adequate ventilation has been achieved only when there are no more fogged surfaces. If damp towels are dried in the bathroom, the window must remain open for a longer time or the ventilation must remain switched on.
Windows open or closed, that's not just a matter of personal preference. Who sleeps with the window open, ensures an immediate removal of moisture from the air. If the window remains closed, it settles in the room. It should therefore be ventilated for at least 10 minutes before bedtime and after getting up. In addition, it is important in winter that the room is slightly heated for at least a few hours. Even those who like to sleep cold and then have to let the room cool again, should take this action. If the walls remain cold throughout, the danger of mold growth in the bedroom is particularly high. In addition, the risk is increased by large furniture that is often found in the bedchamber. If a wall is almost completely covered by a cabinet, the air circulation is restricted. Mold often spreads unnoticed in such places for a long time and is not noticed until the furniture itself or even its contents are affected. A distance of about five centimeters between wall and cabinet can prevent that.
If you frequently and always ventilate from warm to cold and do not neglect heating in winter, you will ensure a healthy indoor climate and can prevent mold in the long term. If the frequency and duration of the ventilation are individually adapted to the circumstances, the harmful spores have no chance.

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