What is an approximate cost per ton for a system? I have the room for horizontal loops and excavation tends to be pretty reasonable. I'm located in SW Pennsylvania. Did a load calculation on a geo-site. Came up with 200,000 BTU heat load, 112,000 cooling load. It's a big house, built in the 1930's. This is a potential purchase and I'm figuring I need to do something like this instead of having a huge gas heat bill....
