We're Cullman's Primary Geothermal Contractor! Cullman, Alabama, homeowners have all sorts of reasons for desiring a geothermal heating and cooling system: remarkable year-round comfort – no matter how extreme the seasonal 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 – often amazing – savings on their energy bills premium installation and maintenance from Southern Solar Systems, Cullman's geothermal professionals. Learn more about what a geothermal heating and cooling system can do to benefit your family's comfort. Check out our Geothermal Savings Calculator. Then contact Southern Solar Systems. We sell, install, and maintain WaterFurnace geothermal systems, the very best in the industry today.