Geothermal heat pumps, also known as ground-source heat pumps, use the earth itself or groundwater by means of transferring heat. As the name implies, heat pumps simply move heat from one place to another. During the winter months, they collect and consolidate heat from the ground and move it inside; during the summer months, they reverse the flow and send warm, indoor air out. Systems are highly-efficient, using a small amount of electricity to capture a large amount of free renewable energy from the earth.

Geothermal heat pumps come in two types: a groundwater (open-loop) system uses well water and an earth-coupled (closed-loop) model moves a water and antifreeze solution through underground pipes.

The following websites contain important information regarding geothermal heat pumps: 

US Department of Energy Energy Efficiency & Renewable Energy »

GeoExchange »

Other options

If you have considered installing renewable energy to power your home, but are not comfortable with the long-term investment, Evergreen is a great alternative. Evergreen is a renewable energy program available for homes, farms or businesses.

Learn more about Evergreen »

For more information about renewable energy contact:

Ted Kjos
Vice President of Marketing & External Relations