We're the Geothermal Source in North Manchester! North Manchester residents in the know turn to Gast Heating & Cooling Inc. for all their geothermal heating and cooling needs. They count on us to give not only the proper installation and service but also the insight to help them maximize the potential 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 North Manchester, Indiana, geothermal professionals at Gast Heating & Cooling Inc..