Particle removal effectiveness of portable air purifiers in aged-care centers and the impact on the health of older people

Guo, Miao; Zhou, Min; Wei, Shen; Peng, Jing; Wang, Qie; Wang, Lexiang; Cheng, Daojian; Yu, Wei

doi:10.1016/j.enbuild.2021.111250

Cited by 17 publications

(9 citation statements)

References 42 publications

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“…Numerous studies have demonstrated the effectiveness of air purifiers in removing indoor particulate matter [ 39 , 40 ] and VOCs [ 41 , 42 ]. The indoor PM 2.5 is significantly different between two spaces where the purifier is used or not used [ 14 ]. Using air purifiers equipped with high-efficiency particulate air filters can ensure purification, despite the presence of PM 2.5 pollutants indoors and outdoors [ 43 ].…”

Section: Discussionmentioning

confidence: 99%

“…Three common strategies are currently used to improve the IAQ of buildings: air purifiers can significantly reduce the indoor concentration of particulate matter and VOCs [11,[13][14][15]; natural ventilation is one of the most direct and effective strategies to remove and dilute indoor pollutants [16,17]; and fresh air systems are a complementary strategy to ensure indoor air quality. The ASHRAE Standard 62.2 suggests the use of mechanical ventilation systems to guarantee good building ventilation rate and indoor air quality [18].…”

Section: Introductionmentioning

confidence: 99%

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The energy and time saving coordinated control methods of CO2, VOCs, and PM2.5 in office buildings

Zhang

Hou

et al. 2022

PLoS ONE

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Indoor air pollution is complex and serious. In fact, an on-site investigation of an office building revealed that the concentration of three typical pollutants (CO2, VOCs, PM2.5) exceeded the Chinese standard. To identify a better control method to achieve good indoor air quality, an orthogonal experiment was carried out in an environmental chamber to compare the control time and energy consumption of four control methods (purifier+ and window+, purifier+ and window-, purified fresh air 240 m3/h and purified fresh air 400 m3/h) to meet the standard established for pollutants. The purifier+ and window+ method was found to be more effective in most conditions, with a control time reduced by 8.06% and energy consumption reduced by 11.91% compared with the traditional control method of purified fresh air 240 m3/h. This research highlights the optimal control strategy for the air quality in office buildings under different pollution conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The energy and time saving coordinated control methods of CO2, VOCs, and PM2.5 in office buildings

Zhang

Hou

et al. 2022

PLoS ONE

Self Cite

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“…However, when the outdoor air pollution is severe, natural ventilation should be restricted to prevent the indoor concentration of the PM or other air pollutants from exceeding the allowable exposure limit. In addition, portable air purifiers [ 29 , 30 ] can also be used to reduce indoor PM exposure, when the outdoor PM concentration is high.…”

Section: Discussionmentioning

confidence: 99%

Associations of Indoor Environmental Quality Parameters with Students’ Perceptions in Undergraduate Dormitories: A Field Study in Beijing during a Transition Season

Miao

Cao

Zuo

2022

IJERPH

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A healthy and comfortable dormitory environment is crucial to the quality of students’ daily lives. In this field study, the indoor environmental quality (IEQ) parameters of undergraduate dormitories in Beijing were measured, while questionnaire surveys were conducted to evaluate the corresponding subjective perceptions of students. Integrated environmental monitoring kits were used to collect temperature, relative humidity, CO2, PM2.5, PM10, TVOC, formaldehyde, and noise data in the investigated dormitories, during the transition season from winter to spring. Questionnaires and scales were distributed to obtain the students’ subjective perceptions of and satisfaction with the IEQ, and their health and well-being status. The measured IEQ data showed that the thermal environment tended to be warm and dry during the heating period. The CO2 concentrations seriously exceeded standard levels due to insufficient indoor natural ventilation. Noise exposure could sometimes interfere with students’ rest. The students’ overall satisfaction with the dormitory environment was low, especially in terms of air quality and acoustic environment. The unsatisfactory IEQ factors have led to several health symptoms, poor sleep quality, and slightly lower well-being. Correlations were found between the IEQ parameters and the corresponding subjective perceptions and satisfaction levels. It was speculated that students’ satisfaction and well-being could be effectively improved by appropriately adjusting the corresponding IEQ parameters.

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“…In particular, for PM 2.5 , WHO recently established a mean limit of 15 µg•m −3 for a 24 h period [40], which is considerably more restricted than the previous WHO limit of 25 µg•m −3 [41]. Some of the existing studies aimed at evaluating the indoor PM 2.5 concentrations in elderly centers reported levels that exceeded the current WHO limit value (15 µg•m −3 ) in some of the audited facilities [2,9,18,45,46]. However, there are also works that found levels of PM 2.5 in elderly centers in compliance with the current WHO guideline, showing that healthy levels can be achieved in these environments [38,47,48].…”

Section: Airborne Pm 25mentioning

confidence: 99%

“…Recently, some air-purification strategies have been employed in order to test the effectiveness of removing particles from indoor environments. In particular, Guo et al [45] installed air purifiers in some elderly center rooms. This intervention resulted in a reduction in PM 2.5 levels by about 72%, showing that the reduction was particularly effective during the first 2 h after the installation of the air purifiers.…”

Section: Airborne Pm 25mentioning

confidence: 99%

Indoor Air Quality in Elderly Centers: Pollutants Emission and Health Effects

et al. 2022

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The world population is ageing, in particular in the developed world, with a significant increase in the percentage of people above 60 years old. They represent a segment of the population that is more vulnerable to adverse environmental conditions. Among them, indoor air quality is one of the most relevant, as elders spend comparatively more time indoors than younger generations. Furthermore, the recent COVID-19 pandemic contributed immensely to raising awareness of the importance of breathing air quality for human health and of the fact that indoor air is a vector for airborne infections and poisoning. Hence, this work reviews the state of the art regarding indoor air quality in elderly centers, considering the type of pollutants involved, their emission sources, and their health effects. Moreover, the influence of ventilation on air quality is also addressed. Notwithstanding the potential health problems with the corresponding costs and morbidity effects, only a few studies have considered explicitly indoor air quality and its impacts on elderly health. More studies are, therefore, necessary to objectively identify what are the impacts on the health of elderly people due to the quality of indoor air and how it can be improved, either by reducing the pollutants emission sources or by more adequate ventilation and thermal comfort strategies.

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Particle removal effectiveness of portable air purifiers in aged-care centers and the impact on the health of older people

Cited by 17 publications

References 42 publications

The energy and time saving coordinated control methods of CO2, VOCs, and PM2.5 in office buildings

The energy and time saving coordinated control methods of CO2, VOCs, and PM2.5 in office buildings

Associations of Indoor Environmental Quality Parameters with Students’ Perceptions in Undergraduate Dormitories: A Field Study in Beijing during a Transition Season

Indoor Air Quality in Elderly Centers: Pollutants Emission and Health Effects

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