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Table 5 COP of the heat pump, with hot water delivered at 40 °C

From: Planned energy-efficient retrofitting of a residential building in Italy

  Frequency [Hz]
T e [°C] 110 90 70 50 30
−7 2.65 2.71 2.67 2.51 2.15
2 3.27 3.38 3.39 3.21 2.78
7 3.75 3.85 3.88 3.72 3.22
12 4.29 4.44 4.49 4.30 3.76