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Can changing the timing of outdoor air intake reduce indoor concentrations of traffic-related pollutants in schools?


MacNeill, M and Dobbin, N and St-Jean, M and Wallace, L and Marro, L and Shin, T and You, H and Kulka, R and Allen, RW and Wheeler, AJ, Can changing the timing of outdoor air intake reduce indoor concentrations of traffic-related pollutants in schools?, Indoor Air: International Journal of Indoor Air Quality and Climate, 26, (5) pp. 687-701. ISSN 0905-6947 (2015) [Refereed Article]


Copyright Statement

Copyright 2015 Her Majesty the Queen in Right of Canada. Licensed under Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

DOI: doi:10.1111/ina.12252


Traffic emissions have been associated with a wide range of adverse health effects. Many schools are situated close to major roads, and as children spend much of their day in school, methods to reduce traffic-related air pollutant concentrations in the school environment are warranted. One promising method to reduce pollutant concentrations in schools is to alter the timing of the ventilation so that high ventilation time periods do not correspond to rush hour traffic. Health Canada, in collaboration with the Ottawa-Carleton District School Board, tested the effect of this action by collecting traffic-related air pollution data from four schools in Ottawa, Canada, during October and November 2013. A baseline and intervention period was assessed in each school. There were statistically significant (P < 0.05) reductions in concentrations of most of the pollutants measured at the two late-start (9 AM start) schools, after adjusting for outdoor concentrations and the absolute indoor–outdoor temperature difference. The intervention at the early-start (8 AM start) schools did not have significant reductions in pollutant concentrations. Based on these findings, changing the timing of the ventilation may be a cost-effective mechanism of reducing traffic-related pollutants in late-start schools located near major roads.

Item Details

Item Type:Refereed Article
Keywords:Indoor air quality, schools, children, intervention
Research Division:Commerce, Management, Tourism and Services
Research Group:Human resources and industrial relations
Research Field:Occupational and workplace health and safety
Objective Division:Health
Objective Group:Public health (excl. specific population health)
Objective Field:Public health (excl. specific population health) not elsewhere classified
UTAS Author:Wheeler, AJ (Dr Amanda Wheeler)
ID Code:107651
Year Published:2015
Web of Science® Times Cited:11
Deposited By:Menzies Institute for Medical Research
Deposited On:2016-03-21
Last Modified:2017-11-03
Downloads:162 View Download Statistics

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