We had our geothermal system installed by Love’s Heating and Air and we have been extremely happy with the results. Attached is a graph (see above) of our annual total residential electrical consumption using a conventional (air exchange) heat pump compared to the ground source heat pump. We saved every month of the year with the greatest savings during the heating and cooling seasons. Also, we had a desuperheater installed at the same time so some of the savings is in hot water. We made no other changes in our home in terms of insulation or # or occupants. Over the course of the year with geothermal we used 67% of the kWh used the previous year and saved over $2K. I can’t compare the severity of weather over the two years but obviously I’m a big believer in geothermal