Bourbon Looks to Us for Its Geothermal Needs We’re Gast Heating & Cooling Inc., the distinguished "go-to" team for Bourbon, Indiana's geothermal heating and cooling. Bourbon homeowners look to us for ... the finest WaterFurnace geothermal heating and cooling systems the best installation and service from highly skilled, highly trained professionals sound advice on how to get more out of their geothermal installations With a down economy, there's never been a opportune time to put a WaterFurnace geothermal system to work for you. And we're the ones to do it in Bourbon, Indiana. Contact Gast Heating & Cooling Inc. today. Want to see just how much "going geothermal" could save you on your energy bills? Spend a moment or two with our simple Geothermal Savings Calculator.