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How Geothermal Works

Using Geothermal Heating and Cooling

Geothermal renewable energy draws upon the Earth’s consistent temperature. Yes, the average Indiana air temperature ranges from 89˚ to 16˚ throughout the year with peaks and valleys that can result in 100+˚ days in the heat of summer and sub-zero days in the dead of winter. However, you may not realize that about four to six feet below the Earth’s surface, the temperature remains relatively moderate and consistent all year, about 50˚– 60˚.

Because the ground absorbs 47% of the sun’s energy (heat) as it hits the Earth’s surface. Geothermal systems are able to tap into this free, renewable energy with an earth loop and provide heat and cool for your home.


How it Heats
During the heating cycle, a geothermal system uses the earth loop to extract heat from the ground. As the system pulls heat from the loop, it distributes it through a conventional duct system or radiant floor system as warm air. Plus, as a bonus, it provides water heating for household use.


How it Cools
In the cooling mode, a geothermal system cools your home by reversing the heating process. Instead of taking heat from the ground, it is removed from your home and either moved back into the earth loop or used to preheat your household water. The cool air is then distributed through the duct system in your home.

Sources of Available Credits and Rebates

Why choose geothermal? | Learn about the benefits of geothermal | Learn about geothermal Earth loops

Learn about our new, innovative Williams Vertizontal™ geothermal Earth loop

Need more information? Ask our experts about geothermal heating and cooling.