Geothermal heating, who can give tips?

We are complete laymen, so please not too technical. But I am interested in everything.

What exactly do you need. A heat pump is a heat pump. Either good or very good. You are basically asking: I want to buy a car. Who can give me recommendations, I have no idea and have only been given two brands. No matter which heat pump you take, it is only the heart of the system. The design of the underfloor heating is the rest of the body. If it is weak (poorly designed), it will not get properly warm or will be expensive to maintain.

That the companies ever recommend a different manufacturer to you will primarily depend on their conditions with the manufacturer. We have a Waterkotte. Whether it really is as good as promised, we will only see. We just moved in in January. As already mentioned, the correct design of the underfloor heating is basically much more important.

Most heating and sanitary businesses have b2b cooperations with 1, 2, max and rarely 3 companies. Their employees then receive all trainings, experience, etc. And that is why they recommend and install only these companies. I have a Buderus brine geothermal heat pump, would have liked to take Nibe, but it was not possible because none of my known heating installers install Nibe.