We're the Geothermal Source in Lake Elmo! Lake Elmo residents in the know look to Comfort By Design, Inc. for all their geothermal heating and cooling needs. They trust us to give not only the correct installation and service but also the insight 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 fill-in your data and marvel at the results. Then, contact us, the Lake Elmo, Wisconsin, geothermal professionals at Comfort By Design, Inc..