Geothermal is Big in Rapid City! Rapid City, Michigan, residents enjoy geothermal heating and cooling. And why shouldn't they? We've got the ideal soil 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 lower your monthly costs in Rapid City? Check out our handy Geothermal Savings Calculator. Then do what so many other Rapid City residents do. Contact the experts at Kalkaska Pumbing & Heating Inc.. We'll help you plan your geothermal system, install it right, and make sure you get the service you need to get everything out of it.