Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Bedroom environmental discomforts, occupant behaviors, and sleep quality based on an online survey

Chenxi Liao 1,2, Jelle Laverge 1, Mizuho Akimoto 3, Chandra Sekhar 4, Pawel Wargocki 2
1 Research group Building Physics, Construction and Climate Control, Department of Architecture and Urban Planning, Ghent University, Belgium
2 International Centre for Indoor Environment and Energy, Department of Civil Engineering, Technical University of Denmark
3 Department of Architecture, Waseda University
4 School of Design and Environment, National University of Singapore

Abstract: Residential buildings account for more than 70% of floor space, and about half of that is bedrooms. Nevertheless, little is known about the conditions in bedrooms and thus clear performance criteria for rating and designing environmental conditions in bedrooms are lacking. The study investigated to what extent people in Belgium were disturbed by bedroom environment of thermal discomfort, noise, and stuffy air during sleep in summer. Sleep quality was also rated by the Pittsburgh Sleep Quality Index (PSQI). A total of 83 responses were obtained, among whom 47.0% had poor sleep quality with PSQI scores higher than five. Responses of people who were disturbed by “too warm” conditions were significantly associated with poor sleep quality; 67.4% of PSQI scores were higher compared to those who were not disturbed (p < 0.05). A dose-response relationship was observed between the PSQI scores and discomfort with the bedroom environment (p < 0.066 for trend). “Too warm” conditions were the major bedroom discomfort in summer in Belgium (temperate climate). More similar studies are required to be conducted in the other three seasons or regions.
Keywords: Bedroom environmental discomfort, Occupant behavior, Sleep quality, Survey
Pages: 2783 - 2788