Air-water heat pump current consumption and data

So I once used a calculator. The calculation is only approximate, but at 23°C and 60% humidity you have about 12.3g/m³ of water in the air. At 20° and the same relative humidity it's 10.4, at 15° and the same rel. humidity it's already only 7.7. Calculated the other way around: if you want to reduce the absolute amount of water in the room at the same relative humidity of 60% at 23°C by half, you would have to cool the room down to 11°C. Then you naturally have the amount of water in liquid form in the room without air exchange. Just as an illustration. That is of course not so absolute, because a little exchange does happen with an open window and closed door. But just not fast enough. And simply equalizing the relative humidity inside to the relative humidity outside is not enough with such greatly differing temperatures. You need much lower relative humidity inside after airing, especially if your temperature does not drop much...

I had already mentioned the cross-ventilation several times. And it should also be clear that the cold air must be warmed up again in order to absorb more moisture. Heating - Ventilating - Heating - Ventilating.

The results are clearly visible with , he just likes to discuss ;)

I would recommend anyone who needs an illustration regarding the humidity or amount of water in the air to google an h-x diagram. A picture (here: diagram) is worth a thousand words.

Decisive for ventilation regarding moisture is the absolute water content of the air. This can mean that cold outside air contains more water than the warm indoor air, then ventilation would transport moisture into the house and not out. To be on the safe side, a calculator that shows the water content at x% humidity and x temperature is recommended.

That is currently impossible in January given the existing weather conditions and a heated house.

Cross-ventilation is only partially possible for me because I have to open the window in the hallway for that. Due to the open layout, there is airflow on the ground floor, which often doesn’t work with two small children.

Currently, I have the following values in the bathroom.
standard rH=~55%
after showering (my wife and I both shower in the evening) rH=~70-80%
after 5-10 minutes of ventilation rH=~35-40%
then rH=~55-60% again when the door is closed.
Since moving in, the values have decreased by about 10% rH, which is why I also don’t believe in a leak. My bathroom is tiled almost to the ceiling everywhere, with a large shower where some water always remains after showering. Three wet towels add to that. Maybe it’s normal, I don’t know.
As a comparison, I only have my parents’ 7sqm bathroom, also tiled to the ceiling. When four people shower there one after another, no condensation forms on the mirror or the window.
I just hope that it gets better over time and that it’s partly due to the residual moisture in the tile mortar.

: I like to discuss, but I don’t see a difference whether I achieve 35-40% rH by cross-ventilation or simple ventilation ;)
The humidity sensor is located on the mirror at a height of 2.30m, pretty central. I have also placed it in the shower once, where it usually measures 5% less than on the mirror. That’s why I would also exclude a leak or a defect here.