Whether your house with [Wärmepumpe] functions efficiently depends on the insulation and not on the theoretical annual performance factor of the [Wärmepumpe].
Nonsense, if you shower more or less regularly, nothing dries out there.
So ... we don't smell :)
But it is a very big difference whether you step on cold or warm tiles when you enter the shower.
That almost sounds like you would freeze if there is no underfloor heating in the shower. Since you usually shower relatively warm, I consider that "disadvantage" negligible, especially since our bathroom has a maximum of 20 degrees (even the ladies in the house don't want it warmer).
As already mentioned above, before you think about a specific model, I would first clarify whether your house can be efficiently heated with a heat pump at all. Underfloor heating and 2 radiators is already not so good.
You can clearly notice the difference. Additionally, every m2 of heating surface in the bathroom is not wrong, even at the targeted 20 degrees.
Then we are strange ... no one has missed it here yet. However, the shower area would possibly dry faster then. I would also recommend - to those of you who have underfloor heating under the shower - to equip the stairs with heating coils so that the temperature difference between the floor and the stairs is not too extreme :)
As already written above, before you think about a specific model, I would first clarify whether your house can even be efficiently heated with a heat pump. Underfloor heating and 2 radiators is not so good.
The radiators are almost never on. One is in the garage and the other in the bathroom upstairs as a "chicken ladder". We already had an offer for a heat pump with solar a year ago. The cost would have been €50,000 plus additional expenses for installation work. Then I was told by another expert that there would probably be newer, more efficient heat pumps in 2020 that use a different refrigerant and thus would make up for the efficiency disadvantage compared to brine systems. When I came across the Arotherm plus today, I asked myself whether it could be such a model. It is also said to be suitable for existing buildings with radiators, as it can provide a supply temperature of 75 °C.