Geothermal is Big in St. Charles! St. Charles, Minnesota, homeowners enjoy geothermal heating and cooling. And why shouldn't they? We've got the ideal ground conditions here. And our seasonal temperature extremes make geothermal installations an excellent choice for all your heating and cooling comfort year-round. Want to see how much a geothermal system of your own could save you in St. Charles? Check out our handy Geothermal Savings Calculator. Then do what so many other St. Charles homeowners have done. Contact the experts at Earth Energy Heating & Cooling Inc.. We'll help you plan your geothermal system, install it right, and make sure you get the service you need to get the most out of it.