Geothermal Heating & Cooling: Franklin County's Choice! To be perfectly honest, let's put it this way: more and more Franklin County residents are discovering that geothermal is the most effective heating and cooling choice. And we're helping them recognize that. We're Fairfield Heating & Cooling. And we understand all about the benefits of geothermal heating and cooling. After all, we've been installing and maintaining geothermal systems for years. Why are more people switching to geothermal? To start with, Franklin County is located in an area with ideal ground conditions for geothermal installation. We've also got the kind of seasonal temperature extremes that let a geothermal system demonstrate its year-round comfort capabilities to best effect. Think about the savings, too. Our Geothermal Savings Calculator can give you a good idea of what they'd be for your family. Learn more. Contact Fairfield Heating & Cooling, your Franklin County, Ohio geothermal authority.