IMHO, I agree with you, and I was quite surprised that these are not the standard here, we had these back up north. I am hoping someone with HVAC experience can provide reasons for not using a ground sourced HVAC system. While the installation cost is higher (burying the heating/cooling loop), there should be a significant savings on the electric bill.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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