We're the Geothermal Source in Ames! Ames homeowners in the know turn to Sherman Co. LLC for all their geothermal heating and cooling needs. They count on 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 fill-in your data and marvel at the results. Then, contact us, the Ames, Iowa, geothermal professionals at Sherman Co. LLC.