Lake City Looks to Us for Its Geothermal Needs We’re Kalkaska Pumbing & Heating Inc., the recommended "go-to" team for Lake City, Michigan's geothermal heating and cooling. Lake City homeowners are turning to us for ... quality WaterFurnace geothermal heating and cooling systems expert installation and service from highly skilled, highly trained professionals professional advice on how to maximize the potential of their geothermal installations With a down economy, there's never been a opportune time to put a WaterFurnace geothermal system to work for you. And we're the professionals to do it in Lake City, Michigan. Contact Kalkaska Pumbing & Heating Inc. today. Want to taste and see just how much "going geothermal" could save you on your energy bills? Spend a moment or two with our easy Geothermal Savings Calculator.