Humidity 60% Masonry damp

There are already some, as mentioned, more than windows open is not possible right now.

Well, then have fun in the moldy dump. At least you're only damaging your own building fabric and not that of a landlord.

Well then, have fun in the moldy place. At least you're only damaging your own building fabric and not that of a landlord.

Haven't you figured it out yet? He is AIRING...
Your comment is utterly unacceptable.

Long airing does not help, air for 5 minutes every 1-2 hours. The air must warm up in the meantime, it is physics

Make the heating curve a bit higher and ventilate shock multiple times. It will settle down. If you are not there during the day and have no other sources of moisture (huge plants, etc.), no moisture will form except the residual moisture. One might think Homo Sapiens can only survive with a ventilation system.

Wow, what is going on here. It seems a few people have gotten on the wrong side of things.

You have to completely air out at least 5 times a day for about 10 minutes each time. And above all, heat the house a lot and well. At least 22 degrees everywhere.

You will only get rid of the moisture about 1 year after moving in.