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