About Gast Heating & Cooling Inc. Your Superior Geothermal Source in Rochester You can look to Gast Heating & Cooling Inc. for all your WaterFurnace Rochester geothermal heating and cooling requirements, including... planning assistance. complete comfort system installation. routine service and maintenance. emergency repair. energy-saving advice and consultation. Our highly trained professional staff is dedicated to the total satisfaction of customers throughout the Rochester area. After all, you've picked the finest heating and cooling system available. We make sure each system will live up to the expectations of, improving your home's conditioning efficiency and helping you cut energy costs. Contact Gast Heating & Cooling Inc. today to get a free estimate and a cost savings analysis for your home.