Why is a heat pump called a heat pump?
A) It moves heat from a low temperature heat source to a higher temperature heat sink.
B) Heat pumps must be pumped up with refrigerant pressure before they can operate.
C) All heat pumps use a pump that is constructed like a centrifugal water pump, but is used to pump heat molecules instead.
D) The conversion of electricity into heat has the effect of pumping heat into the heated space.
A
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