Assertion: heat pump's power | /r/HasProperty | required by the machine
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Source sentences:
text: This "uphill" movement of heat from a low temperature area, into a high temperature area, thus requires work, and the COP says how effectively a heat pump or air conditioner performs this work by telling us the amount of power required by the machine to move a certain quantity of heat, at a certain temperature, from a low temperature area to a high temperature area.