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A comment on The enormous heat pumps warming cities. Parent comment
Which in turn is heated by the sun.
Further down (maybe 1000m under ideal conditions) the heat comes from the core.
I may add that in Sweden this kind of heat pumps are abundant. I have one with a 150m drill hole.
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Which in turn is heated by the sun.
Further down (maybe 1000m under ideal conditions) the heat comes from the core.
I may add that in Sweden this kind of heat pumps are abundant. I have one with a 150m drill hole.