Proper ventilation without controlled residential ventilation, possibly with a hygrometer

Hi everyone,
Unfortunately, we don’t have any controlled residential ventilation or other ventilation aids, and since we will be moving in soon, I would like to know how we should ventilate properly (especially at the beginning).
The principle of shock ventilation/cross ventilation and never tilting the window is clear.
Would it be, for example, useful to have a hygrometer in every room to know the right time to ventilate?
They also say to turn off the heating while ventilating, but how is that supposed to work with underfloor heating?

Hi guys, Unfortunately, we don’t have a controlled residential ventilation system or any other ventilation aids, and since we’ll be moving in soon, I would like to know how we should properly ventilate (especially in the beginning). The principle of shock ventilation/cross ventilation and never airing on tilt is clear. Would it be, for example, sensible to have a hygrometer in every room to know the right time to ventilate? People also say to turn off the heating while ventilating, but how is that supposed to work with underfloor heating?

You’ve already recognized everything correctly! Except for turning off the heating. The heating stays on during ventilation because it is far too sluggish. An interesting question would be from when everyone else turns on the heating to save heating costs. I myself still have the heating off because the house is still pleasantly warm except for the floor, which probably has to do with the controlled residential ventilation and the many windows. How is it with you?

We do not have controlled residential ventilation or any other ventilation aids...

Don’t say "unfortunately." I can only agree with Zaba12. The right strategy is to keep the heating running. If necessary, you need to turn down the thermostats during the shock ventilation so that the heating does not try to reheat and it doesn't become too hot a few hours later.

So we still don’t have heating, don’t even have electricity yet, and still need to paint, etc. (But even if we did, we wouldn’t heat yet) It’s also more a question of whether you should get “smart helpers” or if ventilating by feel might be enough.

This is not rocket science. Hygrometer in the living room and then throw open the windows when the humidity approaches 70%. But beware: If you experience what we did in our previous rental apartment (also a new building), you will go crazy. We aired out 6 to 10 times daily and at the latest 20 minutes after airing, we were back at 65%. On (consecutive) rainy days, you have no chance of getting into a reasonable range. We wasted so much time ventilating and therefore I could sing a daily praise song about our controlled residential ventilation, that's how happy I am with it.

We had planned controlled residential ventilation, but then it was found that unfortunately it did not fit. I am already familiar with the excessive ventilation from our (newly built) rental apartment; after airing, it immediately goes back up to 80%.