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Looks like there's a lot of opportunity to install geothermal heating systems.

Using geothermal energy is surely a niche thing in Germany, yet. I've heard about two or three people who used it for their homes, but nothing large at all.

Here's a German article from two months ago on that: https://www.deutschlandfunk.de/geothermie-in-deutschland-roa...

440.000 installations so far, mostly surface-near (around 100 m depth).

It's very common in Sweden to heat single family houses this way (300k installations). It costs about 15k EUR to install, and according to ads can lower you heating costs by "up to 80%".

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