How Does It Work?
The principle behind geothermal heating and cooling is relatively simple. Below the Earth’s surface, usually a few feet deep, the temperature remains constant throughout the year. In most regions, this temperature is between 7°C to 24°C (45°F to 75°F), regardless of the weather above ground.
To tap into this stable temperature, a geothermal system uses a network of pipes, called a ground loop, buried underground. This loop circulates a water-based solution, typically a mix of water and antifreeze, through the ground to absorb or release heat, depending on the season.
In winter, the fluid in the ground loop absorbs heat from the Earth and carries it to the geothermal heat pump located inside the building. The heat pump then concentrates this thermal energy to warm the air that is circulated throughout the building, providing cosy and efficient heating.
Conversely, during hot summer months, the geothermal system works in reverse. The heat pump extracts heat from the indoor air and transfers it to the cooler Earth via the ground loop. The result is refreshingly cool and energy-efficient air conditioning.