In short, a geothermal heat pump (GHP) draws heat from the ground. A ground-based GHP uses heat from just below the frost level of the ground. This heat energy is constantly renewed by the sun and by heat from the earth to provide a relatively constant temperature.
Using evaporators, compressors and condensers, a GHP takes heat from the ground in the winter to heat a home, and in the summer, it provides cooling by putting heat back into the ground. So, we are merely borrowing heat from the earth, using the same proven technology as in refrigerators.
GHP systems use open or closed ground loops to transfer heat. These loops can be installed horizontally or vertically, depending on your soil conditions, amount of available space, and size of your GHP system.
All components are installed in your mechanical room so there are no unsightly boxes sitting in your backyard, and the earth loops are completely invisible.