In 2016, I have a 5 ton WaterFurnace Series 7 unit installed in my 2300 sq ft house in Eastern Iowa. It is a closed loop system with 5 wells drilled horizontally, each 205' in length. I am fortunate enough that my utility provider offers a discount on "electric" heat from October Through March at $0.065/kWh. From Oct through Feb I have used a totally of 2960 kWh. That is $192.40 before tax or facility charge. I am very please with the performance of my unit and very happy that I ditched LP.