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    The units with the lowest levels of efficiency were, in some cases, two or three times less efficient that those with the highest efficiency levels In fact, 17 percent of air-source heat pumps fell short of the European efficiency standards Optimising the heating curve setting would solve this problem for many units, they determined
  • Heat pump - Wikipedia
    A heat pump is a device that uses mechanical or thermal energy to transfer heat from one space to another The mechanical heat pump, also known as a Cullen engine, uses electric power to transfer heat by compression Specifically, it transfers thermal energy by means of a heat pump and refrigeration cycle, cooling one space and warming the other [1] Heat pumps driven by thermal energy are
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