Abstract:
:Outdoor traffic-related airborne particles can infiltrate a building and adversely affect the indoor air quality. Limited information is available on the effectiveness of high efficiency particulate air (HEPA) filtration of traffic-related particles. Here, we investigated the effectiveness of portable HEPA air cleaners in reducing indoor concentrations of traffic-related and other aerosols, including black carbon (BC), PM2.5 , ultraviolet absorbing particulate matter (UVPM) (a marker of tobacco smoke), and fungal spores. This intervention study consisted of a placebo-controlled cross-over design, in which a HEPA cleaner and a placebo "dummy" were placed in homes for 4-weeks each, with 48-hour air sampling conducted prior to and during the end of each treatment period. The concentrations measured for BC, PM2.5 , UVPM, and fungal spores were significantly reduced following HEPA filtration, but not following the dummy period. The indoor fraction of BC/PM2.5 was significantly reduced due to the HEPA cleaner, indicating that black carbon was particularly impacted by HEPA filtration. This study demonstrates that HEPA air purification can result in a significant reduction of traffic-related and other aerosols in diverse residential settings.
journal_name
Indoor Airjournal_title
Indoor airauthors
Cox J,Isiugo K,Ryan P,Grinshpun SA,Yermakov M,Desmond C,Jandarov R,Vesper S,Ross J,Chillrud S,Dannemiller K,Reponen Tdoi
10.1111/ina.12502subject
Has Abstractpub_date
2018-11-01 00:00:00pages
818-827issue
6eissn
0905-6947issn
1600-0668journal_volume
28pub_type
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