Hi! I was wondering why does LEED require to run a simulation on the 21st of september?
It also requires to perform the simulation during a clear sky condition. However, with the software I used (AGI32) I can't calculate the daylight factor under a clear sky condition. Could someone give me some explanations?
Regarding the overcast sky, I would like to know which is the typical value used? I searched on Google but I got different answers...
Thanking you in advance