Let there be light : the impact of window blinds on daylight-linked dimming and automatic on/off lighting controls

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AuthorSearch for:
TypeArticle
Journal titlei Homes & Buildings
Volume1
IssueSummer 1
Pages1012; # of pages: 3
SubjectDaylighting; Windows
AbstractStudies have shown that daylight-linked lighting control systems such as automatic on/off and continuous dimming have the potential to reduce the electrical energy consumption in office buildings by 30 to 60%. However, in practice, most daylight-linked systems installed in buildings do not provide the anticipated energy savings. Window shades used for sun shading and glare control impact the energy performance of these systems. Projected energy savings are reduced by occupants changing the position of the blinds when direct sunlight reaches their work area, but seldom resetting the blinds for useful daylight admittance after the unwanted conditions diminish. Leaving the blinds closed unnecessarily reduces the amount of daylight available at the photosensor and prevents the photocontrolled lighting systems from achieving maximum energy savings. Photocontrolled blinds can reduce the limitations of manually operated blinds by closing automatically when the interior has too much glare or is too hot, and re-opening later to admit useful daylight.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number47290
16388
NPARC number20377076
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Record identifier3e9f9e3c-5578-4cd5-984f-e7450b2b7f07
Record created2012-07-24
Record modified2016-05-09
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