When it comes to heating your home year round with a low energy cost, eco-friendly alternative, a Geothermal system is the answer. Geothermal heat pumps are also known as Ground Source Heat Pumps (GSHPs). GSHPs operate by collecting heat from the Earth, the largest solar collector in the world. The heat retrieved from the constantly stable ground source or geothermal water source temperature is then transferred into your home. Geothermal applications work because although the air temperature in the winter could drop in some places to 30 below zero, ground and water source temperatures will remain in a constant 40 to 70 degrees, depending on your location, providing a heat source.