General Contractor Construction Service Description

I would, if photovoltaics, cancel the ground-source heat pump and go for a normal air-to-water heat pump. How much would the savings be with your gu?

Including BAFA subsidy, air-water heat pump vs. brine-water heat pump, we would come to about €4,000. And for me, the absence of the ugly outdoor unit is worth it.

We have an air-water heat pump and no outdoor unit.
But with controlled residential ventilation. Without controlled residential ventilation, it generally wouldn't be for me at all. One of the biggest reasons why we preferred building over buying an existing property.

That’s why only 36.5 cm stone without Controlled Residential Ventilation

I don’t want an indoor unit either. It’s supposed to be even worse.

You can also use the stone and controlled residential ventilation, one does not exclude the other.

Oh, and does the brine-water heat pump have no indoor unit?

And how do you come up with only 4000 savings, a drilling costs around 8000-12000€ plus the device at least another 6000€.

Don't see this as criticism but that you should question it well.