A large field study of relationship between indoor and outdoor climate in residential buildings

Abstract High-quality data on indoor climate and energy collected in buildings is required to deepen our understanding of building performance. The aim this work was investigate the relationship between outdoor Danish residential buildings. Field 45 apartments from April 2019 November 2020. Internet things (IoT) devices were installed record temperature, relative humidity CO 2 concentration central corridor each apartment. High (above 1,000ppm) overheating observed apartments. changeover heating mode free running occurred 11.1 13.6°C air temperature. temperature setpoints systems around 20.6-22.3°C, which could be useful values feed simulations order achieve more realistic predictions energy. results study improve environmental quality at a national level.