About Hottinger Geothermal Columbus's Expert Geothermal Source If you are searching for a company that has a complete in-house operation and a documented track record for assisting homeowners with all of their WaterFurnace Columbus geothermal heating and cooling needs, you can trust Hottinger Geothermal. Our complete in-house operation includes... planning assistance. complete comfort system installation. routine service and maintenance. emergency repair. energy-saving advice and consultation. Our highly qualified professional staff is dedicated to the complete satisfaction of customers throughout the Columbus area. After all, you've selected the premium heating and cooling system on the market today. We make certain each system continues to live up to the expectations of, increasing your home's conditioning efficiency and helping you save on energy costs. Contact Hottinger Geothermal today to get a free estimate and a cost savings analysis for your home.