An Ideal mechanical ventilation system for houses

From National Research Council Canada

Download	View accepted manuscript: An Ideal mechanical ventilation system for houses (PDF, 577 KiB)
Author	Search for: Haysom, J. C.¹
Affiliation	National Research Council of Canada. NRC Institute for Research in Construction
Format	Text, Article
Subject	Ventilation
Abstract	Houses 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	1998-09-01
In	Solplan Review, no. September 82 (1 September 1998): 18–19.
Language	English
Peer reviewed	No
NRC number	NRCC 42822 NRC-IRC-9415
NPARC number	20331345
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Record identifier	3ff7576b-631b-4aaf-a27b-6552a992831e
Record created	2012-07-18
Record modified	2020-03-20

Date modified:: 2024-07-19