Our geothermal closed loop system was installed almost two years ago. Or rather installation started two years ago, didn't actually finish till the following Feb. We had a bad contractor! They installed a 6 ton unit (GeoExcel) in the basement for our 3500 sq foot two story house. Water running to an air handler in the basement and to one in the attic. Really generally only one floor needs conditioning at a time. In the summer upstairs, in the winter down. The installer put in one 300 foot deep kelix well along with a trench of slinky pipe running about 100 feet. It appears the installer was overly optimistic on this well's ability to handle the load. My loop temps got into the mid 20s last winter and it even froze up. We added a standard 500 foot well last spring and while loop temps are now much better I am not seeing the energy savings I anticipated. This summer it did seem to keep the upstairs cooler better but I didn't see much of a drop in energy usage. I know it is hard to compare season to season as some are much hotter or cooler than others. Either way, or electric bills are higher using Geo for cooling than they were with ten year old AC units. We no longer spend money on oil to make hot water in the summer, so there are some savings there. We are now early in the heating season with two wells and my electric bill was much higher this Nov. compared to last. The unit does seem to keep it nice and warm. I keep it set at 70 and if I bump it up to 71 at night it will actually get there and shut down after awhile. Unheard of a year ago. Today I turned off the desuperheater after reading that is the general consensus on best winter operation. I checked the loop temps and I am running about 44 in and only 42 out. Isn't a drop of 2 degrees very low? It is a two stage compressor so maybe the fact it was only 4 degrees low accounts for this. I checked my HP and it is set for the default settings which is where it was when it was installed. I have the HP set temp way up to the highest (120F) with hopes of avoiding oil usage. I probably ran it in the 110 to 114 range last year. But I figure that evens out as running longer at the lower figure trying to overcome the cold outside. Any ideas on why I am not getting much better electric bills with double the size loop?