Geothermal Heating & Cooling: Harriman's Choice! To be perfectly honest, let's put it this way: more and more Harriman residents are discovering that geothermal is the most effective heating and cooling choice. And we're helping them realize that. We're Pioneer Heating and Air Conditioning, Inc.. And we understand all about the advantages of geothermal heating and cooling. After all, we've been installing and servicing geothermal systems for a long time. What makes geothermal a no-brainer here? For starters, Harriman is situated in an area with perfect ground conditions for geothermal installation. We've also got the kind of changing temperature highs and lows that let a geothermal system display its year-round comfort capabilities to best effect. Think about the savings, too. Our Geothermal Savings Calculator can provide you with a ball park figure of what they'd be for your family. Learn more. Contact Pioneer Heating and Air Conditioning, Inc., your Harriman, Tennessee geothermal authority.