Assertion: geothermal heat pump | /r/HasProperty | efficient
Facets:
value: highly
type: DEGREE
value: especially
type: DEGREE
Source sentences:
text: Geothermal heat pumps can be especially energy efficient.
text: Geothermal heat pumps are energy efficient and cost effective
text: These systems are more expensive than air source units, but they are highly efficient and can also serve as air conditioners.