Powell Geothermal Heating & Cooling Contractor In Powell, Ohio, the geothermal heating and cooling contractor to call is Westin Air. Our geothermal proficiency is second to none. And we provide the finest products on the market in Powell - or anywhere else, for that matter: WaterFurnace geothermal heating and cooling systems! Try our Geothermal Savings Calculator. It'll tell you why so many homeowners are going geothermal. The monthly savings are huge! We can give you plenty of other good reasons, too. And when you’re ready install? We'll see to it that your WaterFurnace geothermal heating and cooling system is installed - and serviced – right! Contact Westin Air today.