Power source
Type of power supply used by the heat pump.
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Single-phase (230 V). Many models with such a power supply can operate from a conventional outlet, which makes it much easier to connect. However, high power consumption (3.5 kW and above) requires connection to the mains via a distribution board .
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Three-phase (400 V). Power supply from 400 V mains is suitable for heat pumps of any power, including for models equipped with high-consumption heating elements. In addition, devices with such a supply during continuous operation consume less energy than single-phase devices of similar power consumption. Thus, this option can be envisaged even in heat pumps of low power. The disadvantage of three-phase mains is the necessity to ask for the help of a professional electrician to connect the unit.
SCOP (W35)
Like the standard COP (see above), this parameter describes the overall efficiency of the heat pump in heating operation and is calculated by the formula: thermal (useful) power divided by electricity consumption. The higher the coefficient, the more efficient the device. And the difference between COP and SCOP is that COP is measured under strictly standard conditions (outside temperature +7 °C, full workload), and SCOP takes into account seasonal temperature fluctuations (for Europe), changes in pump operating modes, the presence of an inverter and some other options. Thanks to this, SCOP is closer to real indicators, and since 2013 this coefficient has been taken as the main one in the territory of the European Union. However, this characteristic is also used for devices supplied to other countries with a similar climate. And in a specific case, measurements are carried out at a water supply temperature of 35 °C.
Energy efficiency class (W35)
The energy efficiency class characterizes the efficiency of electricity consumption by a heat pump. In this case, the final result is at a water supply temperature of 35°. The most energy efficient models have class A with a certain number of pluses (
A+,
A++,
A+++, the more pluses — the lower the energy consumption), the more energy consuming —
A, B, C and so on as energy efficiency decreases.
SCOP (W55)
Like the standard COP (see above), this parameter describes the overall efficiency of the heat pump in heating operation and is calculated by the formula: thermal (useful) power divided by electricity consumption. The higher the coefficient, the more efficient the device. And the difference between COP and SCOP is that COP is measured under strictly standard conditions (outside temperature +7 °C, full workload), and SCOP takes into account seasonal temperature fluctuations (for Europe), changes in pump operating modes, the presence of an inverter and some other options. Thanks to this, SCOP is closer to real indicators, and since 2013 this coefficient has been taken as the main one in the territory of the European Union. However, this characteristic is also used for devices supplied to other countries with a similar climate. The value is given for a water supply temperature of 55 °C.
Energy efficiency class (W55)
The energy efficiency class characterizes how economically the heat pump consumes electricity. Specified for a water supply temperature of 55°. The most energy efficient models have class A with a certain number of pluses (A+, A++, etc.), the more pluses – the lower the power consumption), the more high consumption – A, B, C, and so on as energy efficiency decreases.
