How Geothermal Heating and Cooling Works

Geothermal renewable energy draws upon the Earth’s consistent temperature. Even though the average Louisville air temperature ranges from about 25˚ to 90˚ throughout the year, the earth’s temperature just four to six feet below the surface remains somewhat constant, 50˚– 60˚. This is because about 47% of the sun’s energy (heat) is absorbed by the ground as it hits the Earth’s surface. Geothermal systems heat and cool your home by tapping into this free, renewable energy with an earth loop.

How It Heats

A geothermal system extracts heat from the ground through an earth loop. Heat from the loop is distributed through a conventional duct system or radiant floor system as warm air. It is also used to heat water for household use.


How It Cools

A geothermal system reverses the heating process to cool your home. Instead of adding heat from the ground, the heat in your home’s air is moved into the earth loop or used to preheat your household water. The cool air is then distributed throughout your home.