The importance of air quality for underground spaces : an international survey of public attitudes

Abstract

Space is a resource that is constantly being depleted, especially in mega-cities. Underground workspaces (UGS) are increasingly being included in urban plans and have emerged as a realistic and essential component of vertical cities. While progress had been made on the engineering aspects associated with the development of high-quality UGS, public attitudes towards UGS as work environment (i.e. concerns public has on the design of UGS) are relatively unknown. Here, we present the first large-scale study examining preferences and attitudes towards UGS, surveying close to 2,000 participants from four cities in three continents (Singapore, Shanghai, London and Montreal). Contrary to some anecdotal or qualitative beliefs, air quality (and not lack of windows) is the major concern of prospective occupants. Windows, temperature and lighting emerged as additional key architectural features for UGS. Importantly, early adopters (i.e. individuals more willing to accept UGS and thus more likely to be the first occupants) across all cities prioritised air quality. Present results suggest that (perceived) air quality is a key architectural feature for UGS that needs to be communicated to prospective occupants as this will improve their attitudes and views towards UGS. This study highlights the importance of indoor air quality for the public.