Thank you 62hog & ChasBean1 for you advice!
ChasBean1, to answer you question, I think this theatre will be fully occupied most of the time, if not all. One bit of information also, they use half the OA requirement due to intermittent occupancy of the space (ASHRE 62-Sec. 6134). I have some...
I inherited the following problem ….
A designer sizes an AHU with the assumption of 50 less people than the actual number, 275. Moreover, he used much less Heat generation factor by the occupancy than the min. ASHRE recommendation, and more… The end result is, we have a 27% undersized AHU (13...