Quote:
Originally Posted by hcoles
This is a great thread.
If I have it correct - the AC (cooling) function of the heat pump is not necessarily more efficient than a normal AC unit.
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For geothermal, this is not necessary the case. My borehole delives brine at 5-ish deg C during the summer. There is an add-on where I can pipe that brine into fan convector in order to cool the house.
Energy consumed is brine pump (around 80W) and convector fan (also around 80W). Theoretical "cooling" power of my borehole is around 10kW. You might be able to get half of it. But it is basically "free".
Disclamer: Borehole temp will vary depending on yearly mean temperature at your location. So "free cooling" will not be as efficient in Arizona as in Minnesota.