The Anthes Building on the Foothills Laboratory campus is the first NCAR/UCAR building to have a geothermal system. This image shows work on the new system. Also known as ground-source heat pumps, geothermal systems draw on the relatively constant temperature of the ground below a building (roughly 50 degrees F in the Boulder area) in order to generate heating in winter and cooling in summer. The system sends fluid through a series of pipes below ground; the fluid returns to a heat pump that generates room-temperature air in roughly the same way that a refrigerator produces cool air. Ground-source heat pumps produce as much as six times more power than they consume.