How Geothermal Works No matter what climate you live in, the temperature throughout the year varies. For some climatic zones that means blazing summers that cool to ice-cold winters, and Central Minnesota is no exception. What most people don't realize is that the temperature underground (regardless of climate or season) stays fairly consistent all year. The ground is able to sustain a higher rate of constant temperature because it absorbs 47% of the sun's energy (heat) as it impacts the Earth's surface. WaterFurnace geothermal systems are able to draw from this free energy with an earth loop. This technology is then used to provide your home or office with central heating and cooling. Geothermal Heating During the heating cycle, a WaterFurnace geothermal heat pump uses the earth loop to draw heat from the ground. As the system draws heat from the loop it distributes it through a standard duct system as warm air. The same heat energy can also be utilized for a radiant floor system or domestic hot water heating. Geothermal Cooling Cooling the air is just the reverse process used in the heating cycle. Warm air is driven by the geothermal heat pump into the ground. By removing the warm air, all that is left is cool air circulating throughout your home. Heating your water during this process is "free". For more information on how to get started with a geothermal system in the Central Minnesota area, contact Geothermal Concept. Start saving on your energy bills today.