Max. water temperature
The highest temperature to which the pump can heat the coolant. It is worth noting that such indicators can be achieved at a fairly high temperature of air or ground. And since heat pumps are used during the cold season, the actual maximum temperature, usually, is less than theoretically achievable. Nevertheless, this parameter makes it possible to evaluate the capabilities of the unit or its suitability for certain tasks.
Supply t°C
The temperature in the flow pipe for which the COP is specified. See below for more details on this coefficient. And this temperature is the temperature of the heat carrier at pump outlet, at which the given COP value is reached.
Note that manufacturers often go to the trick and measure COP for a relatively low temperature (much lower than the maximum temperature of the heat carrier — for example, 35 °C for a model with a maximum of 55 °C). This allows them to give quite impressive performance figures in the specifications. However, at higher temperatures, the actual energy cost per unit of thermal power will be greater and the actual COP will be lower.
COP
The COP (coefficient of performance) is a key characteristic that describes the overall efficiency of a heat pump. It represents the ratio between the thermal power and power consumption of the unit (see above) – in other words, how many kilowatts of thermal energy the pump produces per 1 kW of electricity consumed. In modern heat pumps, this figure can exceed 5.
However, note that the actual COP value may vary depending on the outside temperature and the supply temperature. The higher the difference between these temperatures, the more resources are needed to “pump” thermal energy and the lower the COP will be. Therefore, in the specifications it is customary to indicate the COP value for specific temperatures (and in many models – two values, for different options) – this allows you to evaluate the actual capabilities of the unit.
t°C outside
Outside temperature for which an additional COP is given. See below for details on this coefficient and the value of the outdoor temperature.
Supply t°C
Temperature in the flow pipe for which an additional COP is specified. See below for more details on this coefficient. And this temperature is the temperature of the heat carrier at the outlet of the pump, at which the given COP value is reached.
Note that manufacturers often go to the trick and measure COP for a relatively low temperature (much lower than the maximum temperature of the heat carrier — for example, 35 °C for a model with a maximum of 55 °C). This allows them to give quite impressive performance figures in the specifications. However, at higher temperatures, the actual energy cost per unit of thermal power will be greater and the actual COP will be lower.
COP
Additional heat coefficient COP specified in the specifications in addition to the main one. For more information about the meaning of this indicator, see the "COP" above. And an additional coefficient is indicated for operating temperatures other than the main one — this allows you to evaluate the capabilities of the pump in different conditions.
