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Assessing the effectiveness of portable HEPA air cleaners for reducing particulate matter exposure in King County, Washington homeless shelters: Implications for community congregate settings by Ching-Hsuan Huang; Thu Bui; Daniel Hwang; Jeffry Shirai; Elena Austin; Martin Cohen; Timothy Gould; Timothy Larson; Igor Novosselov; Shirlee Tan; Julie Fox; Edmund Seto is a Environmental Science article available to read on EtoBox.

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Over four thousand portable air cleaners (PACs) with high-efficiency particulate air (HEPA) filters were distributed by Public Health - Seattle & King County to homeless shelters during the COVID-19 pandemic. This study aimed to evaluate the real-world effectiveness of these HEPA PACs in reducing indoor particles and understand the factors that affect their use in homeless shelters. Four rooms across three homeless shelters with varying geographic locations and operating conditions were enrolled in this study. At each shelter, multiple PACs were deployed based on the room volume and PAC's clean air delivery rate rating. The energy consumption of these PACs was measured using energy data loggers at 1-min intervals to allow tracking of their use and fan speed for three two-week sampling rounds, separated by single-week gaps, between February and April 2022. Total optical particle number concentration (OPNC) was measured at 2-min intervals at multiple indoor locations and an outdoor ambient location. The empirical indoor and outdoor total OPNC were compared for each site. Additionally, linear mixed-effects regression models (LMERs) were used to assess the relationship between PAC use

Who reads Assessing the effectiveness of portable HEPA air cleaners for reducing particulate matter exposure in King County, Washington homeless shelters: Implications for community congregate settings?

Author

Ching-Hsuan Huang; Thu Bui; Daniel Hwang; Jeffry Shirai; Elena Austin; Martin Cohen; Timothy Gould; Timothy Larson; Igor Novosselov; Shirlee Tan; Julie Fox; Edmund Seto

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)