Geothermal Heating & Cooling: Mary Ester's Choice! To be perfectly honest, let's put it this way: more and more Mary Ester residents are coming to the same conclusion that geothermal is the most effective heating and cooling choice. And we're helping them see that. We're Energy Systems. And we know all about the perks of geothermal heating and cooling. After all, we've been installing and servicing geothermal systems for a long time. Why are more people switching to geothermal? For starters, Mary Ester is situated in an area with ideal soil 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 capabilities 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 Energy Systems, your Mary Ester, Florida geothermal authority.