Same ways that you keep your house cool. Pumping from a well (or an artesian well) is an open geothermal system and is a very efficient way to go. I would have used my artesian well for heating and cooling my house but open geothermal systems are prohibited in Boone County Indiana. My efforts to use this water for heating and cooling my house were opposed by the county lawyer and surveyor, and my attempts to get the county commissioners to support a variance were supported by most the commissioners but they never rendered a decision. I finally hired a company outside of my county to install a traditional non-geothermal system. Now the water simply dumps on the ground. Efficient small-town government in action!
