Do not ventilate heating air that is too warm into the hallway
Created: 01/11/2022, 12:03 PM
If the hallway is cooler than the room during the heating season, the doors should not be left open.
© Andrea Warnecke / dpa-tmn
The thought is obvious, but experts advise against it: You shouldn't try to warm up cool rooms faster by opening the door to the warm room.
Because that can have dire consequences.
Düsseldorf - In winter, the heated air from a warm room should not be passed through an open door into the cooler adjoining room or the hallway.
This usually means that hardly any heat gets into the cool room, but all the more humidity, explains Erik Uwe Amaya from Haus & Grund Rheinland Westfalen.
His advice: Doors should remain closed between differently heated rooms.
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Because warm air transports more moisture than cool air.
If it encounters cold walls in the next room, it condenses on them.
The plaster or wallpaper will be soaked through and this can promote mold.
The organization recommends
ventilating for ten minutes two to four times a day
.
Five minutes can also help on particularly cold winter days.
It is not enough to just tilt the windows.
In this way there is hardly any air exchange, instead the walls cool down - and that in turn leads to the formation of mold.
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