Air heat pump or use gas and solar?

And then we should actually manage with the originally planned €15,000 drilling costs, if things don't go completely wrong, and could stick to the original version.

Think of the subsidy from progres.nrw before placing the order, which is available again in 2018. €10 per meter drilled. I wouldn't drill a hole for €15K. But generally, I also think it's a nice type of heating.

Since you have not signed yet, also take a look at the €4500 funding from the BAFA.

Since you haven't signed yet, also take a look at the 4500€ subsidy from BAFA.

I have that on the agenda. From 2018, this can only be done online together with the installer.

15000 for the hole... I never quite understand why people do that, you don’t make that up again even after 100 years of heating compared to an air-to-water heat pump.

15000 for the hole... I never quite understand why people do that, even after 100 years of heating you won't have made that back compared to an air-to-water heat pump.

Do you have facts or just an opinion? Besides the costs, there are other advantages: for example, no outdoor unit that takes up space, often makes noise (especially after some time, those are quite strong blasts that such an air heat pump has),.. I also have a ground source heat pump and compared to my neighbors with expensive air-to-water heat pumps I see a clear difference in costs. If my costs remain like this, I will even have a net gain well before the end of the borehole’s lifespan; by the way, replacing a ground source heat pump is cheaper than replacing an air-to-water heat pump at the end of the device’s lifespan...

I also have a brine heat pump and see a significant cost difference compared to my neighbors with expensive air-to-water heat pumps.

Quantify that.