This is a standard

 PrEN14825 This is a standard under development that aims to cover the laboratory testing and a calculation model for SPF calculations for electric driven heat pumps. The heat pumps are tested at a number of different part load conditions (4-6) designed for heating or cooling the house to a set temperature of 16°C at different outdoor temperatures. Different test conditions are given for each type of heat pump.  This standard serves as an input for the calculation of the system energy efficiency in heating mode of specific heat pump systems in buildings, as stipulated in the standard EN15316-4-2:2008.
System limits The model can be used to calculate the seasonal performance factor for air/air- ground source- and air source- heat pumps. The model does not include any losses from the house. To complete the heat demand of the building a backup heater with COP that equals to 1 is accounted for. The system boundary in SPF 4 applies. (Data is treated according to EN14511 where the effect of heat sink pumps and ventilation fans is corrected to overcome the pressure differences of the heat pump