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| geothermal heat pump | |
| Pronunciation: | jE-O-therm-uhl hEt puhmp |
| Definition : | A type of heat pump that uses the ground, ground water, or ponds as a heat source and heat sink, rather than outside air. Ground or water temperatures are more constant and are warmer in winter and cooler in summer than air temperatures. |
| Facts: |
Geothermal heat pumps operate more efficiently than "conventional" or "air source" heat pumps. |