We're Clark County's Primary Geothermal Contractor! Clark County, Illinois, homeowners have all sorts of reasons for wanting a geothermal heating and cooling system: exceptional comfort all year – no matter how extreme the weather variations stable operating performance energy performance (They’d be hard-pressed to find a more "green," more natural way to heat and cool their homes!) significant – sometimes amazing – savings on their energy bills premium installation and maintenance from Andrews Heating & Air Conditioning, Inc., Clark County's geothermal experts. Discover more about what a geothermal heating and cooling system can do to improve your family's comfort. Look at our Geothermal Savings Calculator. Then contact Andrews Heating & Air Conditioning, Inc.. We sell, install, and maintain WaterFurnace geothermal systems, the very best available today.