Geothermal Heating & Cooling: Delaware's Choice! To be completely honest, let's put it this way: more and more Delaware residents are discovering that geothermal is the most effective heating and cooling choice. And we're helping them see that. We're Westin Air. And we understand all about the advantages of geothermal heating and cooling. After all, we've been installing and servicing geothermal systems for years. What makes geothermal a no-brainer here? To start with, Delaware is located in a region with ideal soil conditions for geothermal installation. We've also got the kind of changing temperature extremes that let a geothermal system show off its year-round comfort capabilities to best effect. Think about the savings, as well. Our Geothermal Savings Calculator can provide you with a ball park figure of what they'd be for your family. Learn more. Contact Westin Air, your Delaware, Ohio geothermal authority.