The figure illustrates the differences in design capacity when using EuP Lot 1 and prEN14825. The lower value corresponds to Lot 1 and the higher value corresponds to prEN14825.
Air to air heat pump Laboratory test data was available for one of the air to air heat pumps that were studied in field. SPF from the field study and SPF from the calculation models are presented in Table 10 below. SCOPnet is the SPF for the heat pump that corresponds to SPF1. SCOPon is SPF for the heat pump with the backup heater included and corresponds to SPF2. SCOP is SPF for the heat pump with both backup heater and parasitic losses included. There are some problems by comparing the laboratory test data and the data from field testing, since the field tests do not include the defrosting periods. Therefore SPF from field testing might turn out a little higher than in reality
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