Tired of paying high energy bills? Want to switch to a quieter, more energy-efficient and eco-friendly heating and cooling system? Geothermal may be the solution for you.
What is a geothermal heating and cooling system?
A geothermal system consists of two primary components: a ground source (hence geothermal) heat pump situated inside your house and a closed loop of plastic tubing or pipe that is buried in the ground exterior around your home. The pump circulates a fluid mixture — usually water and antifreeze — through the loop. As the fluid circulates, it acts as a heat exchanger, either dispersing or collecting heat from its immediate surroundings.
How does it work?
Geothermal heating and cooling systems do not convert chemical or electrical energy. Instead, they simply move heat. Outside temperatures fluctuate dramatically during the year. However, because of the insulating properties of the earth, temperatures 4 – 6 feet below ground stay fairly consistent year-round. (Depending on where you live, these average underground temperatures can range from between 45 degrees and 75 degrees Fahrenheit.)
If you’ve ever gone spelunking or spent time in a cave — you know how cold subterranean regions can be. In the winter, the ground temperature is typically warmer than the air above it. The geothermal system absorbs heat from the earth and transfers it into your house. In the summer, when the ground temperature is typically cooler than the air above it, the heat pump draws the heat out of your house and back into the ground. In other words, the ground is a heat source in the winter and a heat sink in the summer.