An Ideal mechanical ventilation system for houses

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Journal titleSolplan Review
IssueSeptember 82
Pages1819; # of pages: 2
AbstractHouses require an indoor/outdoor exchange of air to replenish oxygen used by occupants and to remove pollutants generated by breathing, household activities and building materials and furnishings. For many years, natural air leakage provided this air exchange during winter. Houses built before the 1960s tended to be quite leaky and pressure differences between the inside and outside, caused by wind or temperature difference, were sufficient to provide significant air exchange most of the time. However, even a leaky building envelope does not always guarantee adequate air exchange. The movement of air requires both a pathway (e.g., a leak) and a pressure difference; thus a leaky house will experience no indoor/outdoor air exchange when there is no pressure difference. This is most likely to occur in spring or fall, when winds are light and there is little or no indoor/outdoor temperature difference that can create a stack effect. The leakier the house, however, the less frequent the periods of inadequate air exchange.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number42822
NPARC number20331345
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Record identifier3ff7576b-631b-4aaf-a27b-6552a992831e
Record created2012-07-18
Record modified2016-05-09
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