Ventilation in prefab houses (wood frame with ETICS) also in solid houses?

*ahem*
without naming any quotes or rereading the thread I initially absorbed, I want to say:

the balanced and consistent climate in all rooms is probably thanks to underfloor heating.
Not a controlled residential ventilation system!
I cannot judge the musty smell: my experienced comparisons fall short
If has decided for herself and her family that controlled residential ventilation is no longer an option, that's okay. I can understand it.

We have a solid construction with ETICS and immediately decided on a controlled residential ventilation system (for about 11000 ) because a) we don't want to worry about mold (we are not home during the day to ventilate ) and b) we would probably also enjoy the benefits in winter of not having to open windows and thus save energy.
The house is airtight - at least our blower door test says so - before we had a "natural" draft through wooden windows in an "old building". The air in the house was clear, but there were drafts at the windows

We have some disadvantages: no exhaust air - only recirculated air (although I haven't noticed a difference so far, our dryer had to make way for a condenser dryer and, for example, there is a draft in the bedroom, so you have to be a bit careful with sleeping habits. Sometimes there are noises

The disassembly of the filters is still due after half a year - let's see what hides in there

We have also decided on a controlled residential ventilation system. We are building solidly on 2 1/2 floors. The costs amount to about €8000. Currently, we have far fewer windows/rooms, but airing out in the morning is very unpleasant/time-consuming. The children sit at the breakfast table and are freezing (how will that be again in winter!). Later airing usually doesn’t work because I also have to leave the house. And airing again at noon/evening when the children are back... Cold again. Also, we (parents) only sleep with the window open, even in winter, because we can’t sleep with stale air. In winter and during heavy rain or similar, this is not exactly optimal either, but you do everything for a good night’s sleep. We know two people who have direct experience with controlled residential ventilation. Once in a solid house and once in a prefabricated house. One family (solid) has had the system since around 2000?! So long-term and would install it again anytime. For us, the only disadvantage so far is the recirculation hood instead of exhaust, but maybe we have chosen a good model after all that delivers what it promises. Of course, everyone has to decide for themselves whether they need a controlled residential ventilation system or not. For us, the advantages clearly outweigh the disadvantages so far, and we are happy to invest in a controlled residential ventilation system.

*clears throat* without naming any quotes or rereading the thread that I initially absorbed, I would like to say:

the balanced and consistent climate of all rooms is probably thanks to underfloor heating. Not a controlled residential ventilation system!

...uhmmm - that is simply wrong. Whether radiators or underfloor heating - I can regulate the temperature individually in every room - of course only if each room with underfloor heating has its own heating circuit. And this should (must?) be the case.

In my experience with controlled residential ventilation, temperature differences are still possible but within a limited range. Reason: there are supply and exhaust rooms. The air exchange takes place through these with closed doors (e.g. shortened doors, air vents). And no - it does not draft. So there is draught-free air exchange in all rooms - therefore a relatively even temperature level throughout the house.

Without controlled residential ventilation, this permanent air exchange does not take place and I can achieve larger temperature differences in the individual rooms. Whether this is sensible or not is another question, because in modern airtight houses, "cold" rooms are heated through the adjoining "warm" ones.

Best regards

@Chaosandi: Do you still have a fireplace?

No, I was going to at first, but then decided against it after a vacation in a new house with ventilation and a wood-burning stove.

We definitely wanted an exhaust hood. It was already planned as well. But the heating technician advised us against it several times because of the tight building envelope, etc. Hopefully, it was the right decision and we chose a good recirculating hood.