I am calculating daylight for a Breeam project and I came across a compliance note regarding a dirt factor. It states:
"CN3.4
Dirt factors when calculating daylight - Daylight calculations should include a maintenance factor for dirt on the windows. An example is given in British Standard Code of Practice for daylighting, BS 8206 Part 2, appendix A1.3."
Does anyone here have any experience with accounting for a dirt factor? Is it perhaps included in the daylight factor component in Honeybee?
Thanks in advance!