Many factors play a part in determining your overall heating and cooling costs, but the most important variables are the size of your home and your electricity provider. By telling us those pieces of information, we can give you a reasonable estimate of how much you can save on your annual heating and cooling bills by switching to geothermal. We update our calculator regularly to take into account the current costs of fuel and the rates of the various electricity providers, so your results here will be as accurate as possible.