Kudos on the geothermal heating and cooling. If I may ask, how much did it cost?
We had it done over 25 years ago. The power company was offering a big incentive and also there was a big tax deduction. At the time, we laid out 15k. The system consists of 8 80 ft. deep boreholes connected to a manifold at about 4 ft. below surface and then 2 lines through the foundation into the basement to the compressor and other devices. The lines are filled with a refrigerant which then gets compressed or decompressed depending on whether heat or cool is needed. The benefit of air conditioning in the summer is a by product of hot water. From May thru Sept. our hot water is basically free. During the colder months the system does produce some hot water, but it’s minimal.