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Nordsyn Study on Air-to-Air Heat Pumps in Humid Nordic Climate

image of Nordsyn Study on Air-to-Air Heat Pumps in Humid Nordic Climate

This study was performed for Nordsyn sponsored by Nordic Council of Ministers. The aim was to analyse if the energy labels of air-to-air heat pumps give consumers in Nordic countries sufficient information on energy performance, since declared performance was suspected to be higher than in reality. Due to very few field measurements available, this suspicion could not be confirmed nor rejected. It was found that many heat pumps are declared for lower capacities compared to their intended use in the Nordic countries, to obtain a higher SCOP value on the energy label. Market surveillance tests show that it has become rarer that heat pumps defrost during the laboratory tests. Altogether the study shows that the current energy label does not give clear guidance to the consumer. Recommendations for field measurements as well as suggestions for standard and regulation developments are given.

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Executive summary

In 2013 Ecodesign and energy labelling regulations for air-to-air heat pumps were introduced in EU. Some of the Nordic market surveillance authorities suspects or have the perception that the declared efficiencies for the products on the energy labels and supporting data sheets are considerably higher compared to what have been measured in real installations in the field, especially in cold and humid climates, which in such case would give the consumer misleading information. The purpose of this study was to confirm or reject this suspicion and if confirmed, clarify the reasons for the divergences.

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