Condensation on the service flap frame of the rear garage is moisture in the form of vapor that is present in the room air. Warm air can absorb more moisture than cold air. If the warm room air cools down at the frame as the coldest point, the water condenses there and precipitates in the form of visible drops on the non-thermally separated flap frame (state of the art). This can happen not only on cold days, but also after showering or cooking. A person releases approx. 1 liter of water overnight through the skin and breath.
Condensation can only be prevented if the relative humidity remains as low as possible. This requires a balanced combination of temperature and humidity in every part of the room. Today, the increased demands on the tightness of the vehicle shell make this natural exchange of air more difficult.
As soon as the humidity reaches a critical level, either the temperature must be increased or the humidity level must be reduced by proper ventilation. This means vigorous ventilation for 5-10 minutes several times a day, and this also applies to the rear garage.
Even if it is disadvantageous in terms of energy, winter camping also means always heating against open windows and hatches to minimize the formation of condensation.