I am here to ask if someone in the community has carried out Daylight Autonomy analyses to demonstrate compliance with the BREEAM Visual Comfort credits ?
In fact both Daylight Factors and Daylight Autonomy calcs are accepted by the BRE.
However the definition of the target for daylight autonomy is a bit ambiguous and differs from the other schemes (WELL, HQE, LEED) which are all relying on the sDA metric.
Indeed, (e.g. for an office space) it is requested to demonstrate that the “Average Daylight Illuminance” (averaged over entire space) exceeds 300 lux for 2000 hours or more.
My understanding is that this is not a straightforward output from HB+. Calculating the hourly average illuminance using the hourlyValues component is very demanding when dealing with hundreds of test points and ca. 4000 daylit hours.
Is that something for which we should wait for the MySQL link between the results file and the GH post-processing to be released ?
Is anyone aware of any program that would easily output this metric (hourly average illuminance) ? I would be a bit surprised that this made it through the BREEAM criteria if there was no easy way to calculate it
Thanks in advance for your feedback,