Adel Geothermal Heating & Cooling Contractor In Adel, Iowa, the geothermal heating and cooling contractor to call is Sherman Co. LLC. Our geothermal knowledge is second to none. And we offer the finest products on the market in Adel - or anywhere else, for that matter: WaterFurnace geothermal heating and cooling systems! Take a look at our Geothermal Savings Calculator. It'll tell you the best reason for going geothermal. The monthly savings are big! We can tell you plenty of other good reasons, too. And when you’re ready install? We'll make sure that your WaterFurnace geothermal heating and cooling system is installed - and serviced – right! Contact Sherman Co. LLC today.