Geothermal Upgrade to Air Conditioner

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If heat exchanger is described, and whole cost is under $700 for upgrade - then we have a way to integrate water exchange for refrigerant coils - at about $500 for 24000 BTU heat pumps (2x $250)

Look at the design to observe whether 12000 BTU heat exchanger can scale to 24000 BTU - standard size for 1500 SF homes.

https://www.youtube.com/watch?v=s-41UF02vrU

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