We're the Geothermal Source in Harlan! Harlan residents in the know look to Camblin Mechanical Inc. for all their geothermal heating and cooling needs. They trust us to provide not only the proper 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 whirl. Just load it with your data and marvel at the results. Then, contact us, the Harlan, Iowa, geothermal professionals at Camblin Mechanical Inc..