Geothermal Heating & Cooling: Defiance County's Choice! To be completely honest, let's put it this way: more and more Defiance County residents are finding out that geothermal is the smarter heating and cooling choice. And we're helping them see that. We're Schlatters Plumbing Heating & AC. And we understand all about the benefits of geothermal heating and cooling. After all, we've been putting in and maintaining geothermal systems for years. Why are more people switching to geothermal? To start with, Defiance County is located in an area with perfect ground conditions for geothermal installation. We've also got the kind of fluctuating 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 give you a ball park figure of what they'd be for your family. Learn more. Contact Schlatters Plumbing Heating & AC, your Defiance County, Ohio geothermal authority.