Why houses need mechanical ventilation systems

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TypeIssue
Series titleConstruction Technology Update; no. 14
ISSN1206-1220
Physical description4 p.
SubjectVentilation
AbstractA house needs a third of its air exchanged every hour. Owners of houses built before 1960 relied on air leakage through the building envelope for indoor/outdoor air exchanges. And they could, because houses then were leaky enough and wind or temperature difference saw to the necessary air movement. In the 1960s, houses became more airtight, and some were heated electrically (they did not even need a chimney). In the 1970s with its oil crisis, houses became even more airtight. With little air leakage through the building envelope, a mechanical ventilation system is required for moisture and pollutant removal. So, the question now is: how does one ventilate optimally?
Publication date
PublisherInstitute for Research in Construction. National Research Council Canada
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
NoteAussi disponible en français : Pourquoi les maisons ont besoin de ventilation mécanique
Peer reviewedNo
NRC number9143
NPARC number20325259
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Record identifier13076694-f9ff-4700-905e-f979e1ddae1b
Record created2012-07-18
Record modified2016-05-09
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