Sorry, I thought this was discussed more recently. Yes, I have geothermal in my house. We installed it when we built the house 18 years ago. Yes, there is a place in Plain City, Geo Source One that installs and services geothermal systems. We have a Tetco system and my brother and parents have the Water Furnace brand. I have a closed loop system, with 3500 feet of piping throughout my side yard. If you have additional questions let me know. Overall, we have been very happy with our system. My parents got 22 years from their first Water Furnace. We went with Tetco, because my heating contractor when we built our house wasn't able to purchase from Water Furnace directly. Whenever, I need a new system in the future it will be Water Furnace from Geo Source one, these guys know their stuff and have been around for a long time.
Rick