We're Mansfield's Primary Geothermal Contractor! Mansfield, Ohio, homeowners have all sorts of reasons for wanting a geothermal heating and cooling system: remarkable comfort all year – no matter how extreme the seasonal variations stable operating performance energy performance (They’d be hard-pressed to find a more "green," more natural way to heat and cool their homes!) significant – often extraordinary – savings on their energy bills superior installation and maintenance from Sisler Heating & Cooling, Inc., Mansfield's geothermal professionals. Find out more about what a geothermal heating and cooling system can do to improve your family's comfort. Check out our Geothermal Savings Calculator. Then contact Sisler Heating & Cooling, Inc.. We sell, install, and maintain WaterFurnace geothermal systems, the finest on the market today.