Mohrsville Geothermal Heating & Cooling Contractor In Mohrsville, Pennsylvania, the geothermal heating and cooling contractor to call is Paul W. Essig Inc.. Our geothermal expertise is second to none. And we provide the best products available in Mohrsville - or anywhere else, for that matter: geothermal heating and cooling systems! Try our Geothermal Savings Calculator. It'll show 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 see to it that your geothermal heating and cooling system is installed - and serviced – right! Contact Paul W. Essig Inc. today.