this sounds very interesting. I'm going to have to think on what you've said some more until it all sinks in. I'm hoping to eventually (crossing my fingers and toes!) to build one of your GSHP, install piping underground, and use that to help augment the cooling requirements of our house during the summer.
This picture should help illustrate what I have in mind. for the pex under our 2nd floor. I'll be installing it throughout in-between the joists of our floor framing. I'm told this is also where our AC/heating ductwork will go.
The red line I inserted is also traveling down the inside-corner of our building, where I'll have everything running all of this. My wife calls this my Central-Command, as she thinks I'm half-crazy for trying to do all of this. haha.
