Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The mid floors make sense; less ground reflectance going up. It's consistently your top floor that is the anomaly.
In that case, you may have some different construction materials happening that are changing how much daylight is bounced around the room. Since the top level is the driving factor, check to see if you have a different internal reflectance going on with the underside of your roof surface as compared to an internal ceiling surface.
I had something similar happen once when modeling radiant surfaces vs non-radiant surfaces. It took me HOURS to figure out what was going on, but the floor construction was the culprit.
