An illustration of geothermal heat pumps. Geothermal heat is a central heating and cooling system that uses the earth as a heat source (in the winter) or a heat sink (in the summer). This illustration outlines five types of heat pumps: a pond loop,an open loop,a horizontal loop,a slinky loop and a vertical loop | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Shockey, Gwen |
Taille de l’image : | 3000 px × 2400 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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