Washington Looks to Us for Its Geothermal Needs We’re Hulsman Refrigeration, Inc., the recommended "go-to" team for Washington, Indiana's geothermal heating and cooling. Washington residents look to us for ... the best WaterFurnace geothermal heating and cooling systems highend installation and service from highly skilled, highly trained professionals sound advice on how to get more out of their geothermal installations With the economy like it is, there's never been a opportune time to put a WaterFurnace geothermal system to use for you. And we're the ones to do it in Washington, Indiana. Contact Hulsman Refrigeration, Inc. today. Want to see just how big "going geothermal" could save you on your energy bills? Spend a moment or two with our easy Geothermal Savings Calculator.