Mansfield Looks to Us for Its Geothermal Needs We’re Sisler Heating & Cooling, Inc., the distinguished "go-to" team for Mansfield, Ohio's geothermal heating and cooling. Mansfield homeowners look to us for ... the best WaterFurnace geothermal heating and cooling systems the best installation and service from highly skilled, highly trained professionals professional advice on how to get more out 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 ones to do it in Mansfield, Ohio. Contact Sisler Heating & Cooling, Inc. today. Want to see just how big "going geothermal" could save you on your energy bills? Take a moment or two with our simple Geothermal Savings Calculator.