We're the Geothermal Source in Harford County! Harford County residents in the know turn to Ground Loop Heating & Air Conditioning, Inc for all their geothermal heating and cooling needs. They trust us to provide not only the proper installation and service but also the insight to help them maximize the potential from their geothermal systems. Considering a geothermal system of your own? Give our nifty little Geothermal Savings Calculator a try. Just enter your data and marvel at the results. Then, contact us, the Harford County, Maryland, geothermal professionals at Ground Loop Heating & Air Conditioning, Inc.