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Originally Posted by jamesqf
I think you probably mean a ground-source heat pump, not a true geothermal system. (Though they're often miscalled geothermal heating by merchants trying to take advantage of public ignorance.) A geothermal system works on actual hot water (or rock), such as a hot spring, which I don't think you're likely to find in Finland. (At least I don't recall seeing any.)
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Fingie is not misusing the term, although ground-sourced heat pump is more specific. It's like the difference between saying "solar energy" and "photo-voltaic electricity"
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Geothermal energy is the heat from the Earth. It's clean and sustainable. Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma.
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