Air-water heat pump current consumption and data

I know how it works with cold and warm air in relation to humidity ;-)
Warm, moist air is transported out the window after showering, not cold air into the room.
That’s why I don’t understand your post .
I keep the window open until the hygrometer in the bathroom settles at the outside humidity. Any further airing doesn’t help because otherwise the bathroom cools down too much.

Yes, so Halmi's explanation is convoluted, but I also think that just opening the window doesn't help much because you don't achieve sufficient air exchange in a short enough time. You have to cross-ventilate so that the air with a lot of moisture goes out and the air with less moisture (regardless of whether cold or warm) comes into the bathroom and can absorb the (remaining) moisture and then also go out. Otherwise, the moisture just condenses on the open window and then remains in liquid form in the room on the jamb, only to be absorbed again by the now cooler air, which can absorb somewhat less moisture --> higher relative humidity...

Edit: I had just written "pane," but that's good because that would then be on the outside when the window is closed. But all the water on the jamb etc. is still inside.

Well, I don't see it that way. If you look at it closely, the warm, moist air flows out at the top part of the window, while cold air enters the room at the bottom part. This creates an air exchange even with an open window (without cross-ventilation). The outside humidity level in the bathroom is reached in my case after 5-10 minutes depending on [AT]. The bathroom door is closed during this! I can't get the humidity any lower than that.

well, I don’t see it that way. If you take it exactly, warm humid air flows out at the upper part of the window, while cold air enters the room at the lower part. This also creates an air exchange even with an open window (without cross ventilation). The outside humidity level in the bathroom is reached after 5-10 minutes depending on the outside temperature. The bathroom door is closed during this! I can’t get the humidity any lower than that.

5-10 minutes after showering without cross ventilation. Then you could also leave the window tilted open for half the day. In our last apartment, thanks to our own entrance, we always threw everything wide open for 10 minutes (really everything – even in winter) 3 times a day. And even that was not enough.

You are right, but the exchange is too slow. This causes the humidity to simply condense, partly even in the bathroom and not be expelled. The relative outdoor humidity, for example, is measured at a much lower temperature, right? That means the absolute amount of water per cubic meter is much lower outside than inside with you (at the same relative humidity value). What Halmi means is that the cold air absolutely contains much less moisture. If you let the air into your bathroom, as soon as it warms up again, it can absorb more moisture (because absolutely less was in it before). That means as soon as you are back at the desired temperature, the relative humidity would be lower. I just add that this also has to happen quickly enough so that the moisture does not simply condense on the surfaces and then remain in the room. Which theoretically would not matter with sufficient air exchange anyway, because the fresh air has very little absolute moisture. But you also don't want to cool down to 5°.

Attention layman's reasoning:

You opened the window for 5-10 minutes. Assuming you actually exchanged the air volume once (which is still questionable, because you won't measure the humidity at several points, right? Maybe there is still a moist "air lake" hanging under the ceiling or in a corner.) Then you close the window). But you still have the moisture that has settled on the walls, ceiling, tiles, ceramics, towels, floor runner. You can't get rid of that by ventilating for 5 minutes without cross-ventilation. Ergo, you close the window, the slightly cooler air warms up and absorbs the moisture from the surfaces again -> humidity rises.

Possible?