Geothermal systems don’t create heat or manufacture cool air. Instead, they take advantage of the fact that while the Earth’s surface temperature varies throughout the year, the temperature 4-6 feet underground is relatively constant all year round (45-70 degrees F). A geothermal system transfers this comfortable temperature to your home.
The system consists of a loop system buried underground and hooked up to a geothermal unit. A water-based solution circulates through these pipes. During the winter, the solution heats up as it circulates through the warm pipes underground. This heat is then transferred to the geothermal unit, which compresses the heat and distributes it through your home through a radiant system or regular ductwork.
In the summer, the process works similarly, but in reverse. The geothermal unit takes the heat from your home and transfers it to the solution. As the solution makes its way through the system, the heat is transferred into the much cooler ground. Your home is kept cool and comfortable no matter how hot it gets outside.