Pros and Cons of Ventilation and Exhaust Systems

Something must be wrong here, what is the humidity in the individual rooms in the evening and morning, and how do the values change through ventilation and how quickly do they rise again after ventilation?

Also, please provide the temperatures during the day and at night...

Humidity is normally around 50-60 percent. After airing out, it goes down to 38 percent, but then rises again when you are at home. Overnight, it can rise to 66 percent in the bedroom.

The temperatures for that would be interesting, since heating air tends to be rather dry and your values are at the upper end of the comfort range.

In summer, with a lot of ventilation, we are also rather around 60%, but during the heating period at about 30%.

No, it doesn't go down that far.

Nothing cheesy... It's called physics... but many slept in school... that's why things like this happen... everything that doesn't fit the worldview is lobby...

Well, but you still can't name the moisture. Where does it come from in my bone-dry house? And which physics are you talking about? We have 22°C in the house summer and winter. The walls and floors are completely insulated at the bottom, which you can expect in a new house. The house has been standing for 3 years and is now completely dried out. And where exactly was I sleeping now, Mr. Professor? By the way, air humidifiers were invented for such dry houses—probably just to make it finally mold, just to please Mr. Mycraft.

Where does it come from in my bone-dry house?

People, animals, plants, cooking, dishwasher, washing machine, showering, bathing, mopping, etc.

Was the question meant seriously?

The question of how moisture gets into the house is totally pointless. Because you live in it and release it just by existing. Done.

How you ventilate it might be a matter of taste, but not whether you have to get rid of it.

Anyone who claims that an inhabited and lively house is without any ventilation bone dry should prove it: Seal everything tight for two days, no exhaust hood in the kitchen, but continue living normally with cooking, showering, washing machine, dishwasher, breathing, etc. Then measure the humidity. If it’s still bone dry after that, I’ll say nothing...

By the way, humidifiers were invented for such dry houses

They were actually invented for people whose mucous membranes threaten to break down in the already significantly drier winter. It has nothing to do with the house, but with the season. These old ceramic reservoirs were not hung on radiators for nothing back in the day.