Geothermal makes perfect sense. However data trumps theory every time (sorry I am a scientist). The fact is that geothermal will on average cost you more money than conventional heating and cooling. It should not be the case, but on average it will cost you more. Each piece of hardware should be relaible but it is not. You will, on average, outspend any savings on the well-designed use of geothermal energy on maintainance costs for the units. As I said, this should not be the case, but it simply is the case.
