Fan Zhang
Shichao Liu
Wenye Hu
Manuj Yadav- 1School of Engineering and the Built Environment, Griffith University, Southport, QLD, Australia
- 2Department of Civil, Environmental, and Architectural Engineering, Worcester Polytechnic Institute, Worcester, MA, United States
- 3School of Architecture, Design and Planning, The University of Sydney, Sydney, NSW, Australia
- 4Institute for Hearing Technology and Acoustics, RWTH Aachen University, Aachen, Germany
Editorial on the Research Topic
Effects of indoor environmental quality on human performance and productivity
Indoor environment quality (IEQ) closely relates to the health and wellbeing of persons who use the space there (The National Institute for Occupational Safety and Health, 2013). Indoor air quality (IAQ), thermal comfort, lighting comfort, and acoustic comfort are the four primary IEQ factors. Previous research demonstrates that the quality of a building’s indoor environment significantly affects occupants’ health (Hoskins, 2003), satisfaction (Cheung et al., 2021), comfort and wellbeing (Al Horr et al., 2016a), as well as cognitive function and productivity (Al Horr et al., 2016b; Wang et al., 2021) The IEQ is also significantly associated with the energy use and efficiency of buildings (Roumi et al., 2021). Due to the IEQ domain’s highly applied nature, the focus has been placed on creating connections between physical indoor environmental parameters and human responses as a means of improving building management, operation, and control (Zhang et al., 2019). Although the quantitative relationships between IEQ and human responses are not well understood, there is no doubt that desirable IEQ exerts a positive impact on building occupants (Sakellaris et al., 2016).
However, many residential, commercial, and industrial buildings do not have satisfying IEQ (Kubba, 2016). Common problems can include thermal discomfort (Liu et al., 2017), poor air quality due to indoor air pollutants and/or insufficient ventilation (Rajagopalan et al., 2022), insufficient daylight and reflection/glare issues (Hamedani et al., 2019), and auditory distraction (Yadav et al., 2017), which may in turn adversely affect occupants and building energy efficiency (Hu & Davis, 2021; Roumi et al., 2022). Building on the existing initiatives, this research topic Research Topic aims to present new research evidence in monitoring and assessing IEQ parameters, and propound new methods and perspectives in addressing IEQ issues and reducing the negative impact on building occupants. The research topic collects five articles in IAQ, lighting, and acoustics areas, including three original research articles, one review, and one perspective.
In recent years, there has been a growing concern about toxic chemical compounds released from building materials and household items into indoor spaces (Suzuki et al., 2019). Building materials frequently contain chemicals that continue to emit or “off-gas” after installation for extended periods of time. The first paper examines the indoor air pollutants of new high-rise apartments in Dubai. Jung et al. conducted an on-site measurement of the volatile organic compounds (VOCs) concentration in nine new apartments with different layouts and finishing materials. They also carried out a laboratory experiment to continuously monitor the VOCs concentration for 30 days. The results provide a rational basis for Dubai municipality to regulate the IAQ in new apartment buildings.
The second paper is a related IAQ field monitoring study in Dubai’s residential buildings. Jung et al. (2022) investigated and compared the concentration of common indoor air pollutants in six households in a residential area with that of five households in an industrial area. Effects of confounding variables were also examined, including dwelling size, outdoor pollution concentration, time after construction, type of finishing materials, indoor temperature and relative humidity, and type of furniture, appliances, and fixtures. Results show that building materials’ emissions of indoor air pollutants decreased 18 months after the construction. However, the formaldehyde concentration can still exceed the IAQ standard level thus representing a long-term IAQ problem for all dwellings.
Light, the most important entrainment cue for circadian rhythms, can reduce occupants’ fatigue and sleepiness and, consequently, improve occupants’ performance in workplaces. A growing body of literature investigated how light influences occupants’ productivity, alertness, task performance, and cognitive functions, but some led to mixed results. The third paper, Wang and Zhao, reviewed forty-five studies and provided a systematic understanding of the non-image-forming (NIF) effect of light. One objective indicator, post-illumination pupil response, could be potentially used in field studies investigating NIF, since it is non-invasive and faster, compared to electroencephalogram measurements, and melatonin measurements in plasma or saliva.
In buildings, occupants’ performance and productivity are influenced by the light entering their eyes, in the context of the entire lighting environment. Conventional lighting design strategies only focus on the light on horizontal planes since horizontal illuminance is required by most national and international standards. Concerns have been raised that vertical illuminance at eye levels should be considered to evaluate glare and the circadian effect of lighting. The light that does not enter occupants’ eyes is wasted as it does not contribute to either visual perception or NIF. In the fourth paper, Durmus et al. proposed a framework to evaluate lighting more holistically. This new framework can help better assess lighting design solutions and quantify both energy efficiency and visual quality of the illuminated space.
Lately, the use of active noise cancellation (ANC) headphones has been garnering substantial interest as a potential coping mechanism against intelligible speech, which represents a major contributor towards dissatisfaction with open-plan offices. There is, however, very limited research investigating the cognitive and subjective effects of using ANC headphones in office settings, which is addressed in the fifth paper. Mueller et al. simulated intelligible speech from various locations in an office, which was presented to participants across several settings in a laboratory experiment. The results showed no significant effect of ANC being on or off on short-term memory performance although wearing ANC headphones significantly improved subjective aspects such as perceived privacy and the assessment of the acoustic environment. These results highlight the complicated nature of assessing occupants’ performance in offices in relation to the use of ANC headphones.
The variety of research areas and topics in these five papers highlight the extensive research interests and efforts in improving buildings’ IEQ and subsequently building occupants’ health and wellbeing, comfort, and productivity. Yet, there are still a plethora of unknowns in this field waiting for future research studies to unveil, especially the combined effects of IEQ factors on building occupants, and how the weakest performing IEQ factors affect occupants’ overall IEQ perception.
Author contributions
FZ and SL contributed to the conception of this editorial. FZ wrote the first draft. WH and MY wrote the lighting and acoustic sections of the manuscript. All authors contributed to the manuscript revision, read, and approved the submitted version.
Conflict of interest
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Publisher’s note
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Keywords: indoor environment quality (IEQ), indoor air quality (IAQ), acoustics, lighting, performance and productivity, energy efficiency
Citation: Zhang F, Liu S, Hu W and Yadav M (2022) Editorial: Effects of indoor environmental quality on human performance and productivity. Front. Built Environ. 8:1095443. doi: 10.3389/fbuil.2022.1095443
Received: 11 November 2022; Accepted: 14 November 2022;
Published: 22 November 2022.
Edited and reviewed by:
Hazim Bashir Awbi, University of Reading, United KingdomCopyright © 2022 Zhang, Liu, Hu and Yadav. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Fan Zhang, fan.zhang@griffith.edu.au