We're Central Lake's Primary Geothermal Contractor! Central Lake, Michigan, homeowners have all sorts of reasons for desiring a geothermal heating and cooling system: exceptional comfort all year – no matter how crazy the weather variations stable operating efficiency energy efficiency (They would look forever to find a more "green," more natural way to heat and cool their homes!) significant – sometimes amazing – savings on their energy bills superior installation and maintenance from Kalkaska Pumbing & Heating Inc., Central Lake's geothermal professionals. Find out more about what a geothermal heating and cooling system can do to increase your family's comfort. Look at our Geothermal Savings Calculator. Then contact Kalkaska Pumbing & Heating Inc.. We sell, install, and maintain WaterFurnace geothermal systems, the finest in the industry today.