ᐅ Experience Arotherm Plus 75/6 at 230 V S2

Hello, we received the information about our heating system for the new build (120 sqm (1,292 sq ft) living area) yesterday.
I would like to hear your opinions about it.
Nothing has been installed yet ;-)

I can get it too, but unfortunately, I cannot provide any user experiences yet.
The annual performance factor report of 4.6 gives me hope. I am combining it with a Recovair 260 and integrated control via BUS. This way, BAFA funding is possible for both.

Specify the tile spacing in the bathroom to the plumber.

What am I supposed to tell him, don’t they know best?
I have read that with proper installation it can even provide cooling.
What should you pay attention to in this case?

Heat pump matched to heating load
Supply temperature not higher than 30 degrees Celsius (86°F)
Room-by-room heating load calculation according to DIN standard
Specify the desired temperature for each room; otherwise, 20 degrees Celsius (68°F) for rooms and 24 degrees Celsius (75°F) for bathrooms will be used by default.
Install underfloor heating beneath bathtubs and showers.
Consider installing wall heating in bathrooms (underfloor heating integrated into the wall).
Pipe diameter at least 17 x 2 mm (approx. 0.67 x 0.08 inches) for distribution pipes.
All heating circuits should be roughly the same length, none longer than 100 meters (330 feet).
Connect the heating circuit manifold (HKV) with sufficiently large pipe diameters.
Avoid pipe crimp connections where possible.
Have the underfloor heating design calculated by an external specialist firm; it costs a few hundred euros but is well worth it.
See the discussion thread by Tolentio and OWL.

Hello, since I am building a KFW 55 house, my building owner has hired an energy consultant. Does he also calculate something like that?