Well, your house is sealed. Where is the humidity in the bathroom supposed to go? If you don't open windows and doors, it won't go away either. I can't say anything about the air quality in your house, of course, but if you ventilate regularly, it will be fine. Somehow, air exchange should take place, either manually or automated.
yes, correct , it still stabilizes at around ~60% in the bathroom after 3x 5-10 minutes of shock ventilation. And only in the bathroom. When I close the door, after a few hours it smells like musty, wet towels. All other rooms have between 40-50% and very good air quality!
yes, right , it still settles at about ~60% in the bathroom after 3x 5-10 minutes of shock ventilation. And only in the bathroom. When I close the door, after a few hours it smells like musty, wet towels. All other rooms have between 40-50% and very good air quality!
Shock ventilation in the form that the window in the bathroom is open, or in the form that a draft is created by opening other windows on the upper floor? After 10 minutes of ventilation, there should be more difference than just 2K. At the current temperatures, it is also very surprising that your modulating pump is not running continuously. Especially considering the old building hysteresis of 3K.
The window in the bathroom is open, so no cross ventilation. Depending on the outside temperature, I ventilate for 5-10 minutes. But usually, 5 minutes are always necessary to get the moisture off the windowpane. The heat pump basically runs almost continuously. The heating cycle is only interrupted by the hot water preparation.
Most heat pumps have problems with cycling during the transition period due to too high power output. Therefore, I set the hysteresis to 3K (at 18°C) and 2K (at -15°C). For the activated ERR, I don't find the result bad so far.
I am still experimenting with the compressor power and the starting power during the pre-control period using the trial and error method :-P
After showering, you should get into the habit of airing out for 10-20 minutes, and occasionally in between, then leave the bathroom door open afterwards