Is a brine-water heat pump still worthwhile with KfW 40+?

By the way, is the borehole as a heat source depleted

Can you explain that, I wasn’t aware that this is a possibility. Or does that definitely happen sooner or later?

At the moment I’m getting an air-to-water heat pump, but maybe in the next project...

Can you explain that, I wasn't aware that this is an option. Or does that happen anyway sooner or later?

If the withdrawal performance and drilling meters match, nothing happens.

Can you explain that, I wasn't aware that this is a possibility. Or does that definitely happen sooner or later?

At the moment I'm getting an air-water heat pump, but maybe in the next project...

That was just the tip of an altogether unsubstantial post. Not worth remembering.

Can you explain that, I was not aware that this is a possibility. Or does that happen anyway sooner or later?

wrote that the one also has to renew the heat source sometimes. Of course it is clear that he means the heat pump (regardless of whether it is a ground-source heat pump or an air-to-water heat pump) - but he gave a lay-up suggesting that the heat source = borehole could also be exhausted. With correct design, nothing happens. But I have already seen incorrectly designed trench collectors from which too much heat was extracted. That is really sh... then.

that was only the tip of an overall insubstantial post.

There is a grammatical mistake in that. It must be "only the tip of an overall insubstantial" post.

@Guckuck2 wrote that one also has to renew the heat source sometimes. Of course, it is clear that he means the heat pump (regardless of whether it is a brine-water heat pump or an air-water heat pump) – but he gave an easy setup for the fact that the heat source = borehole could also be exhausted. With correct design, nothing happens. But I have already seen incorrectly designed horizontal trench collectors from which too much heat was extracted. That’s really sh... then.

You deliberately misunderstood that. Of course, it is about renewing the heat source of an air-water heat pump, which is regularly not necessary for a brine-water heat pump, especially with special boreholes.
Because it is not exposed to the weather and equipped with fewer moving parts (not to say none at all).

There is a grammatical error in that. It has to say "only the tip of an altogether insubstantial" posting.

q.e.d.