Experiences with IDM salt heat pump?

We have very large and many windows facing southeast. Do you really think that is purely a buffer up to the specified 11 kW? What happens with the pump when there is little heating load? Does it then consume much more electricity?

If the pump is oversized, it usually wears out faster and operates inefficiently. Suppose the data from Crink are correct, then your pump would operate at design temperature -9 or whatever you have there, with 7.8 kW, so almost minimal power; at 0 degrees it might only need 5 kW, which is already below the minimal power. That means it would have to cycle because it cannot modulate any lower.

Yo and just think the smaller one goes up to 13kw and you don’t even have 8kw at lowest temperatures. Then there are internal gains (devices, humans, etc.) and solar gains...

The previous heating load comes from the energetic building balance. Room-wise, the energy consultant also calculated a heating load of about 8 kW. We have now planned the Terra SWM 3-13 HGL. Accordingly, the drilling company has also adjusted the drilling depth. We are now 160 m lower than before. This results in 9 kW from 7.2 kW extraction capacity and 1.8 kW electricity. Honestly, this unsettles me now, especially because I heard from an installer that he actually experienced twice that the drilling froze around the probe due to insufficient drilling depth. What do you think about that? I mean, I do have a heat pump with about 13 kW maximum rated power. However, if I can only achieve a maximum of 9 kW through the drilling, isn't that contradictory? Or am I having a thinking error? Or if I need a maximum of 8 kW anyway, does it not matter?

Would still be too high in the minimum output for me personally.

2.9-3.2 kW is the smallest that my BWT can manage, and it has not exceeded that even at minus 15 degrees.

You mean you would rather choose the heat pump and drilling depth smaller the other way around?