Geothermics consist in the extraction of energy contained in the ground to use it under the form of air conditioning, heating, or to transform it into electricity. The establishment of a geothermal heat pump system is an important investment, but it allows you to become owner of an inexhaustible energy source that will provide you 60% to 70% of your heating energy. Geothermal systems can be installed in new houses or in those built a long time ago. Geothermics thereby enable to considerably reduce the use of fossil or electrical energies that emit much more greenhouse gases, and that are generally less profitable in the long term.