Looking for some advice. I found an old thread from 2012 in this forum but unfortunately could not find the answer I'm looking for. I have two outbuildings that I'm installing GHPs in and want to install a shared loop field between them. I should clarify that one building has an air to air HP on it now and will remain that way until the system fails. However, the other building is new and therefore I'm putting in a geo unit to start. So in reality, the system will have a significantly oversized loop field for now but I want to be prepared for the future since I'm having the contractors here now to "dig everything up". The buildings sit about 100' apart and will both have 5 ton systems in them. My question is in relation to how do you plumb the loop so both systems can benefit? Is it possible to do it with one flow center with a signal wire coming from the other building to call the pumps? Is there a better way? Any suggestions would be greatly appreciated. Thanks in advance!