My thought of preheating the ground loop would be for "emergency heat" only insead of the resistance heater.
I undersand they have a COP of 5 or higher. If I understand correctly, if you add an additional 1kw to raise the temp of the water you would get 4kw of heat out of the pump. I you use 1kw resistance heater you only get 1kw heat.
Again, this is only me pondering these questions and looking for feedback.
As for my home, I plan on getting a energy audit in the future just out of sheer curiosity. I have already opened and closed the whole thing up so it will be for knowledge only.
Except for the windows/doors I imagine infliltration is pretty low. House wrapped then 1.5" foil faced exterior poly iso with taped seams. Between ALL the studs/framing has been spray foamed with rigid foam.
Anywho, just bouncing ideas off you guys. I love this site!
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