Impact of room supply register location on predicted thermal comfort and IAQ

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Journal titleInternational Journal of Ventilation
Pages301310; # of pages: 10
SubjectAir heating; Air supply; Air Systems; Air temperature; Construction time; IAQ; Indoor air quality; New constructions; Residential; Tracer gas; Indoor air pollution; Thermal comfort; Phase interfaces
AbstractFor residential forced air heating and cooling systems conventional thinking is that air supply registers should be located under exterior windows. There were good reasons for this in the past (primarily to counteract the cold downdraught from the window) but new construction standards (well-insulated walls, better glazing and air tight wall/window interface) mean that there is now less downdraught. Positioning the supply air register away from a window could have a large impact for new construction as duct lengths could be shortened (saving materials and construction time). This could also allow greater architectural freedom as the forced air system would not need to be ducted to the building perimeter. This paper presents results from experiments conducted in a new, well-constructed building to evaluate whether the supply registers can be moved away from the traditional location without impacting indoor air quality or predicted thermal comfort. The physical experiments showed that in both traditional and non-traditional placement: (1) there are minimal changes in predicted thermal comfort (a measure of thermal discomfort - vertical air temperature difference much lower than 3K), and (2) contaminant-removal effectiveness (a measure of indoor air quality) values were in the same range.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Research in Construction (IRC-IRC)
Peer reviewedYes
NRC number54493
NPARC number21269458
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Record identifier32449639-4740-44a1-b18b-6ef217d50672
Record created2013-12-12
Record modified2016-05-09
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