Geothermal Heating & Cooling: Germantown's Choice! To be perfectly accurate, let's put it this way: more and more Germantown residents are discovering that geothermal is the smarter heating and cooling choice. And we're helping them recognize that. We're Air & Heat Service Co.. And we know all about the perks of geothermal heating and cooling. After all, we've been installing and maintaining geothermal systems for years. Why are more people switching to geothermal? For starters, Germantown is situated in a region with perfect ground conditions for geothermal installation. We've also got the kind of seasonal temperature highs and lows that let a geothermal system show off its year-round comfort potentiality to best effect. Consider the savings, too. Our Geothermal Savings Calculator can provide you with a good idea of what they'd be for your family. Learn more. Contact Air & Heat Service Co., your Germantown, Tennessee geothermal authority.