We're the Geothermal Source in Medina! Medina residents in the know look to Sisler Heating & Cooling, Inc. for all their geothermal heating and cooling needs. They trust us to give not only the correct installation and service but also the knowledge to help them get the most from their geothermal systems. Considering a geothermal system of your own? Give our nifty little Geothermal Savings Calculator a try. Just enter your data and marvel at the results. Then, contact us, the Medina, Ohio, geothermal professionals at Sisler Heating & Cooling, Inc..