The physics don't change but the ground never goes to -25F. So yes, after paying for digging (unless you have a deep pond), well designed geothermal remains ef

The physics don't change but the ground never goes to -25F. So yes, after paying for digging (unless you have a deep pond), well designed geothermal remains efficient regardless of season. It is seen as the most efficient option, especial in more extreme environments.