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Proceedings of eSim 2016: 9th Conference of IBPSA-Canada

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Modelling for daylight autonomy for LEED V4 – implications for cities in northern latitudes

Marc Trudeau, Charling Li, Andrea Frisque

Abstract: The daylight performance metrics and requirements in LEED Version 4 are increasingly applied to Canadian projects, either as an explicit target in separate documents defining requirements, such as for publicprivate partnership (P3) projects, or as a target that teams choose to pursue under the LEED Version 4 rating system. The required daylight levels in LEED Version 4 are identical throughout North America, however, the available daylight outside varies significantly based on latitude and local weather. In this research we use DIVA-for-Rhino to model spatial Daylight Autonomy (sDA) levels reached for the same building in 5 Canadian locations and 1 American location. This paper discusses the degree to which daylight performance is affected by latitude and weather in the respective locations, as well as the effect of floor plate depth and glare control devices. The paper includes a proposed alternative compliance path for projects located in northern latitudes to demonstrate compliance to LEED Version 4. The purpose of this alternative path is to incentivize daylight design in locations where occupants would benefit the most from increased access to daylight. This paper focusses on sDA requirements indicated in LEED Version 4; it does not provide an in depth analysis of other daylight requirements in LEED Version 4, such as annual sunlight exposure.
Pages: 487 - 493
Paper:
esim2016_74-136