How geothermal works
Unlike many HVAC systems, geothermal heating and cooling units don’t burn fossil fuels. They use electricity to access the earth’s internal temperature, which stays constant regardless of the weather outside. In the summer, the earth’s center is cooler than its sunny surface. In the winter, it’s warmer than the frozen ground. To better understand the science behind geothermal, heat pumps can be a helpful point of comparison. In colder months, geothermal systems pull heat from the earth into your home. When it gets warmer, geothermal systems transfer unwanted warmth back below the surface.