Tiefenbeck, VerenaVerenaTiefenbeckWörner, AnselmaAnselmaWörnerSchöb, SamuelSamuelSchöbFleisch, ElgarElgarFleischStaake, ThorstenThorstenStaake2023-04-132023-04-132019-01https://www.alexandria.unisg.ch/handle/20.500.14171/9902610.1038/s41560-018-0282-1Feedback interventions have proved to be. effective at promoting energy conservation behaviour, and digital technologies have the potential to make interventions more powerful and scalable. In particular, real-time feedback on a specific, energy-intensive activity may induce considerable behaviour change and savings. Yet, the majority of feedback studies that report large effects are conducted with opt-in samples of individuals who volunteer to participate. Here we show that real-time feedback on resource consumption during showering induces substantial energy conservation in an uninformed sample of guests at 6 hotels (265 rooms, N =  19,602 observations). The treatment effects are large (11.4%), indicating that the real-time feedback induced substantial energy conservation among participants who did not opt in, and in a context where participants were not financially responsible for energy costs. We thus provide empirical evidence for real-time feedback as a scalable and cost-efficient policy instrument for fostering resource conservation among the broader public.enjournal article