In the summer, the outdoor air is warm, and in the winter, it’s freezing cold. Underground, things aren’t nearly this volatile, however. Just four to six feet below the ground you walk on, the temperature stays constantly moderate all year long thanks to heat from the earth’s core.
Geothermal systems take advantage of this free, constant heat by circulating water below the earth so it can be warmed and bringing it into your home. Once carried into the indoor compression unit in your home, the warm water is then heated to an even hotter temperature and used to regulate the climate within your house. In the summer, a complete reversal of this process replaces the hot air inside your home with cooler, more comfortable air.