Peru Geothermal Heating & Cooling Contractor In Peru, Indiana, the geothermal heating and cooling contractor to call is Gast Heating & Cooling Inc.. Our geothermal proficiency is second to none. And we offer the best products on the market in Peru - 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 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 Gast Heating & Cooling Inc. today.