Do consumers act in a sustainable way using their refrigerator? The influence of consumer real life behaviour on the energy consumption of cooling appliances

Over recent decades, energy savings and resource conservation have become increasingly important issues for debate, and this includes the residential sector. Since the introduction of the European Energy Label, the energy consumption of appliances has decreased drastically. Additionally, a number of guidelines have been published to assist the consumer in adopting more energy-saving behaviours. Refrigerators and freezers in particular are covered by these recommendations because they are large energy consumers in domestic households. In order to understand the influence of consumers' real life circumstances and their behaviour in relation to the energy consumption of refrigerators, a web-based survey was carried out. A total of 1011 participants in four European countries completed a questionnaire to allow the researchers to gain information about refrigerator characteristics and consumer behaviour in relation to refrigerator use. As well as demographic and socio-economic characteristics of the participants, data were collected on refrigerator configuration and specification, ambient conditions (ambient temperature, position near any heat sources), and consumer behaviours such as shopping frequency, loading of the refrigerator, door opening and food consumption. The study has shown that recommendations on energy efficient usage are not always observed. A major finding of the present study is that for 25% of refrigerators, correct operation is not ensured as these appliances are operated outside the temperature ranges specified according to their climatic classes. This suggests a lack of consumer information on this topic. Consequently, guidelines and recommendations will have to be revised and their dissemination to be improved in order to ensure the sustainable and safe use of domestic refrigerators.