Controlled residential ventilation and still open windows at night

The controlled residential ventilation normally exchanges about 0.6 times per hour. So at the latest every 2 hours everything is exchanged = at least 12 times a day.

Controlled residential ventilation only results in dry air compared to windows if you ventilate little/hardly with windows. But you can also regulate the controlled residential ventilation down to 0.1x or 0.2x. I would rather put up more plants.

There is controlled residential ventilation with moisture recovery, if you like. That even gives you an advantage over window ventilation. Otherwise, the dryness of the air with controlled residential ventilation exactly corresponds to the dryness with window ventilation if the same amount is exchanged. You can experiment with this as much as you want and see how far you can turn down the controlled residential ventilation until it just doesn’t mold anymore. I would not recommend it. Better to put up more plants.

The thing is, with controlled residential ventilation you can regulate at all. With controlled residential ventilation you can even install moisture recovery. In the worst case, you can turn off the controlled residential ventilation or even plaster over it (outlets). Retrofitting is practically not possible. If you are really sensitive about dryness, then inform yourself about moisture recovery, controllability, combine the controlled residential ventilation with humidity sensors (KNX or whatever).

And with the plants you don’t have a tropical rainforest. You don’t have to buy a hundred plants to raise the humidity from 20% to 90%. That can be regulated... 1 plant too few, 2 plants too few, 3-10 plants okay = perfect room climate with controlled residential ventilation with heat recovery and MR, 11-20 plants too many, 300 plants = tropical rainforest etc...

0.6 is normally not done because the system then runs quite high and that is unnecessary - moisture protection is significantly lower and you set something in between - just according to preference.

And whether you believe it or not - a controlled residential ventilation with moisture recovery does achieve something - rather counterproductive in summer, sufficient in winter. However, the winter has to be cold for this, otherwise the drying effect is not as great.

And many devices nowadays no longer have to run constantly. You can often run week/day programs that adjust the ventilation according to demand (e.g., a bit more in the morning after getting up, or a short intensive ventilation in the bathrooms after showering etc. by pressing a button). In the last two years I have also been satisfied with the moisture recovery. Even in summer it is better than without, because it works both ways (too humid air is also dried).

from on the go

Yes, air is a poor conductor of heat. Therefore, for example, solid bricks had to give way to perforated bricks or hollow bricks. Yes, without additional measures, many ventilation systems fail early at sub-zero temperatures because the 1000 watts of the pre-heating coil consume a lot of electricity, but the amount of heat produced is the same as that of a travel hair dryer. And yes, enthalpy devices are good for sensitive people. In regular ventilation systems, condensate is produced that must be drained, whereas in enthalpy devices, the outlet is almost always dry.

In the last two years, I have also been satisfied with the moisture recovery. Even in summer, it works better than without, because it works both ways (too humid air also becomes drier).

What kind of device do you have?

So the installer told us that after a hot steamy shower, you should even open the window...