What Daylight Study does
An aperture register, effective opening areas and a reproducible daylight proxy.
How it fits into the workflow
- Choose region and units, then record room geometry and reflectance.
- Add each window or rooflight with transmission, frame and sky-angle factors.
- Compare options and retain the assumptions before detailed simulation.
Where it can save time
Multiple apertures, frame factors, transmission assumptions and room reflectance can be compared in one traceable study. That helps teams discard weak options before commissioning detailed climate-based simulation.
Compliance and professional limits
The proxy is not a BS EN 17037 assessment, BRE BR 209 study, planning assessment or climate-based daylight simulation. Those sources define wider methods, contexts and evidence than the simplified comparison provides.
Professional boundary: This is not a BS EN 17037, BRE BR 209, LEED, planning or climate-based daylight assessment.
In summary
Daylight Study is most useful when its saved output remains connected to the project decision and is reviewed within the limits described above.