Electricity consumption at home, what is your consumption?

Clay bricks have a vapor diffusion value, and thus vapor diffusion-open houses have existed for several centuries, this has nothing to do with airtightness

You said it. For centuries, unsuspecting home builders have been deceived.

Clay bricks have a vapor diffusion value

Go ahead, how much of what can actually "diffuse around" in what time?

On the subject of controlled residential ventilation: never without it again. Not for money. Or rather for the small amount of money that comes from photovoltaics, which is anyway borne by the general public.

Whether diffusion-open or not, fresh air must enter the house

It is simply nice to always have the best air quality no matter when .... especially in the bedroom I won’t give that up at night anymore .... every woman will agree with me who spends the night with closed windows AND a man .... has to spend it (-;

that means conversely,
dense houses with controlled residential ventilation,
or diffusion-open houses without controlled residential ventilation,
we chose gate 2

what is supposed to be a diffusion-open house? And when I think of diffusion, I think of water vapor, not air exchange. Only air exchange prevents mold. According to the Energy Saving Ordinance, however, your house must be built airtight, so that is out of the question.

The fact is: a well-built house does not need controlled residential ventilation if ventilated manually correctly. That is still true today. But the comfort, especially in winter, is enormous. And at night when I sleep, I cannot ventilate. Likewise, I cannot ventilate when I go on vacation or sit in the office. But even when I am at home, I do not want to constantly open windows, especially not in winter.

In summer, a controlled residential ventilation proves useless; I have already had that experience. But in Germany, we only have 3-4 months of summer. The rest of the year, I worship this simple machine.