Maryland Geothermal Heating & Cooling Contractor In Maryland, , the geothermal heating and cooling contractor to call is J. Zanes LLC. Our geothermal proficiency is second to none. And we provide the best products available in Maryland - or anywhere else, for that matter: WaterFurnace geothermal heating and cooling systems! Try our Geothermal Savings Calculator. It'll show you why so many homeowners are 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 J. Zanes LLC today.