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Daylight Metrics and Climate-based Daylight Modelling

It is generally agreed that any metric(s) to replace the daylight factor should be founded on climate-based daylight modelling (CBDM). In this paper we examine the relationship between the predicted annual occurrence of glare and one of the candidate CBDM metrics that has been proposed, called useful daylight illuminance (UDI). The setting is a residential building which we use as a ‘virtual laboratory’ in two design configurations, each evaluated under all 32 combinations of 8 European climates and 4 building orientations.

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