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Impacts of air cleaners on indoor air quality in residences impacted by wood smoke

Citation

Wheeler, AJ and Gibson, MD and MacNeill, M and Ward, TJ and Wallace, LA and Kuchta, J and Seaboyer, M and Dabek-Zlotorzynska, E and Guernsey, JR and Stieb, DM, Impacts of air cleaners on indoor air quality in residences impacted by wood smoke, Environmental Science and Technology (Washington), 48, (20) pp. 12157-12163. ISSN 0013-936X (2014) [Refereed Article]

Copyright Statement

Copyright 2014 American Chemical Society

DOI: doi:10.1021/es503144h

Abstract

Residential wood combustion is an important source of ambient air pollution, accounting for over 25% of fine particulate matter (PM2.5) emissions in Canada. In addition to these ambient contributions, wood smoke pollutants can enter the indoor environment directly when loading or stoking stoves, resulting in a high potential for human exposure. A study of the effectiveness of air cleaners at reducing wood smoke-associated PM2.5 of indoor and outdoor origin was conducted in 31 homes during winter 2009-10. Day 1, the residents' wood burning appliance operated as usual with no air cleaner. Days 2 and 3, the wood burning appliance was not operational and the air cleaner was randomly chosen to operate in "filtration" or "placebo filtration" mode. When the air cleaner was operating, total indoor PM2.5 levels were significantly lower than on placebo filtration days (p = 0.0001) resulting in a median reduction of 52%. There was also a reduction in the median PM2.5 infiltration factor from 0.56 to 0.26 between these 2 days, suggesting the air cleaner was responsible for increased PM2.5 deposition on filtration days. Our findings suggest that the use of an air cleaner reduces exposure to indoor PM2.5 resulting from both indoor and ambient wood smoke sources.

Item Details

Item Type:Refereed Article
Keywords:Indoor air quality, intervention, air filter, wood smoke
Research Division:Medical and Health Sciences
Research Group:Public Health and Health Services
Research Field:Environmental and Occupational Health and Safety
Objective Division:Health
Objective Group:Public Health (excl. Specific Population Health)
Objective Field:Environmental Health
Author:Wheeler, AJ (Dr Amanda Wheeler)
ID Code:101143
Year Published:2014
Web of Science® Times Cited:8
Deposited By:Menzies Institute for Medical Research
Deposited On:2015-06-10
Last Modified:2015-09-15
Downloads:0

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