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Seasonal variation in indoor air quality from a field study investigating the impact of ventilation rates on the health of asthmatic children in Québec City

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
ConferenceIndoor Air 2011: 06 June 2011, Austin, Texas
Subjectindoor air quality; air exchange rate; ventilation; field study; asthma; Indoor air
Abstract
This paper describes the results obtained in 115 homes during a randomized intervention study investigating the impact of ventilation rates on indoor air quality (IAQ) and the respiratory health of asthmatic children in Québec City, Canada. Ventilation interventions were conducted in half the homes determined to be under ventilated in order to increase the air exchange rate in the heating season to above 0.30 h1. The majority of the homes (85%) did not meet our nominal ventilation goal of 0.30 h1 and the average air exchange rate measured in winter was a factor of 2.8 smaller than in summer. The concentrations of the aldehydes, NO2 and O3 were all higher in summer while most hydrocarbons, aromatics, halocarbons and alcohols were higher in winter. On average, most homes met Health Canada?s guideline for an 8hr exposure of formaldehyde of 50 µg m3 in winter but not in summer despite the higher observed air exchange rates.
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  • Indoor Air 2011: 06 June 2011, Austin, Texas [Proceedings] (6 June 2011): 1–6.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 54467
NRC-IRC-21727
NPARC number20373884
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Record identifier723127aa-9397-475d-bed2-b240d7a88c32
Record created2012-07-23
Record modified2020-07-14
Date modified: