Home > Research > Publications & Outputs > How efficiently can HEPA purifiers remove prior...

Electronic data

  • EI Re-submission Final

    Accepted author manuscript, 0.98 MB, PDF document

    Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License

Links

Text available via DOI:

View graph of relations

How efficiently can HEPA purifiers remove priority fine and ultrafine particles from indoor air?

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

How efficiently can HEPA purifiers remove priority fine and ultrafine particles from indoor air? / Lowther, Scott; Deng, W.; Fang, Z et al.

In: Environment International, Vol. 144, 106001, 01.11.2020.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

APA

Vancouver

Lowther S, Deng W, Fang Z, Booker D, Whyatt D, Wild O et al. How efficiently can HEPA purifiers remove priority fine and ultrafine particles from indoor air? Environment International. 2020 Nov 1;144:106001. Epub 2020 Jul 30. doi: 10.1016/j.envint.2020.106001

Author

Lowther, Scott ; Deng, W. ; Fang, Z et al. / How efficiently can HEPA purifiers remove priority fine and ultrafine particles from indoor air?. In: Environment International. 2020 ; Vol. 144.

Bibtex

@article{0ec3437d75a044cba1ee3a3c19ccc459,
title = "How efficiently can HEPA purifiers remove priority fine and ultrafine particles from indoor air?",
abstract = "More than 1 million premature deaths in Asia annually are estimated to be associated with indoor air quality. HEPA (high-efficiency particulate air) filter air purifiers (APs) are widely used in urban Chinese residences by the growing middle class, as public awareness of air pollution increases. Currently, understanding of how particle size affects particle removal is inconsistent, and the rate at which different particle types are removed remains largely unknown. Therefore, this investigation aimed to determine the relationship between particle size and the removal efficiency of particles, and how efficiently ambient air is filtered compared to standard particle types which are typically used for such tests (tobacco smoke, dust and pollen). Three of the most popular AP models in China were tested in China{\textquoteright}s largest indoor controlled chamber laboratory and the removal efficiencies of particles in the 18-514nm range were identified. Each AP had a distinct profile of removal efficiency against particle size, but the three APs shared similarities in performance, with removal efficiency consistently lowest at 200-250nm. This size fraction is important in an exposure context as these particles are abundant in ambient air in mega-cities, can penetrate through building shells effectively, remain airborne for long periods of time and can penetrate the deepest areas of the lungs. Ambient air particles were removed at a similar rate to test particles; this confirms that the Association of Home Appliance Manufacturers{\textquoteright} (AHAM) standards are a suitable proxy for “real world” performance.",
keywords = "HEPA, Air Purifiers, Air Filtration, Particulate Matter, Ambient PM",
author = "Scott Lowther and W. Deng and Z Fang and Douglas Booker and Duncan Whyatt and Oliver Wild and Xinming Wang and Kevin Jones",
year = "2020",
month = nov,
day = "1",
doi = "10.1016/j.envint.2020.106001",
language = "English",
volume = "144",
journal = "Environment International",
issn = "0160-4120",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - How efficiently can HEPA purifiers remove priority fine and ultrafine particles from indoor air?

AU - Lowther, Scott

AU - Deng, W.

AU - Fang, Z

AU - Booker, Douglas

AU - Whyatt, Duncan

AU - Wild, Oliver

AU - Wang, Xinming

AU - Jones, Kevin

PY - 2020/11/1

Y1 - 2020/11/1

N2 - More than 1 million premature deaths in Asia annually are estimated to be associated with indoor air quality. HEPA (high-efficiency particulate air) filter air purifiers (APs) are widely used in urban Chinese residences by the growing middle class, as public awareness of air pollution increases. Currently, understanding of how particle size affects particle removal is inconsistent, and the rate at which different particle types are removed remains largely unknown. Therefore, this investigation aimed to determine the relationship between particle size and the removal efficiency of particles, and how efficiently ambient air is filtered compared to standard particle types which are typically used for such tests (tobacco smoke, dust and pollen). Three of the most popular AP models in China were tested in China’s largest indoor controlled chamber laboratory and the removal efficiencies of particles in the 18-514nm range were identified. Each AP had a distinct profile of removal efficiency against particle size, but the three APs shared similarities in performance, with removal efficiency consistently lowest at 200-250nm. This size fraction is important in an exposure context as these particles are abundant in ambient air in mega-cities, can penetrate through building shells effectively, remain airborne for long periods of time and can penetrate the deepest areas of the lungs. Ambient air particles were removed at a similar rate to test particles; this confirms that the Association of Home Appliance Manufacturers’ (AHAM) standards are a suitable proxy for “real world” performance.

AB - More than 1 million premature deaths in Asia annually are estimated to be associated with indoor air quality. HEPA (high-efficiency particulate air) filter air purifiers (APs) are widely used in urban Chinese residences by the growing middle class, as public awareness of air pollution increases. Currently, understanding of how particle size affects particle removal is inconsistent, and the rate at which different particle types are removed remains largely unknown. Therefore, this investigation aimed to determine the relationship between particle size and the removal efficiency of particles, and how efficiently ambient air is filtered compared to standard particle types which are typically used for such tests (tobacco smoke, dust and pollen). Three of the most popular AP models in China were tested in China’s largest indoor controlled chamber laboratory and the removal efficiencies of particles in the 18-514nm range were identified. Each AP had a distinct profile of removal efficiency against particle size, but the three APs shared similarities in performance, with removal efficiency consistently lowest at 200-250nm. This size fraction is important in an exposure context as these particles are abundant in ambient air in mega-cities, can penetrate through building shells effectively, remain airborne for long periods of time and can penetrate the deepest areas of the lungs. Ambient air particles were removed at a similar rate to test particles; this confirms that the Association of Home Appliance Manufacturers’ (AHAM) standards are a suitable proxy for “real world” performance.

KW - HEPA

KW - Air Purifiers

KW - Air Filtration

KW - Particulate Matter

KW - Ambient PM

U2 - 10.1016/j.envint.2020.106001

DO - 10.1016/j.envint.2020.106001

M3 - Journal article

VL - 144

JO - Environment International

JF - Environment International

SN - 0160-4120

M1 - 106001

ER -