Edisto Island Geothermal Heating & Cooling Contractor In Edisto Island, South Carolina, the geothermal heating and cooling contractor to call is Custom Climate Heating & Air. Our geothermal expertise is second to none. And we offer the best products available in Edisto Island - 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 big! We can explain to 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 Custom Climate Heating & Air today.