Geothermal is a kind of renewable energy that comes from the Earth’s internal heat. How does it work? Water runs through the pipes, goes all around the house and finally comes back in the soil. Water comes from deep in the ground. This water has been heated in the Earth by the natural temperature in the ground. After, the water comes back in the house to heat the house. During the summer, it is the same concept except that the water that comes from the soil is cooler than the temperature in the house. In fact, this action can cool the temperature in the house.