So your saying that each at each junction, the pressure drop for that branch and all the upstream branches need to be equal? That makes sense, so if the losses are all equal in the duct, the flow through each branch would be equal and the duct size doesn't affect the flow but only the velocity?
I am modifying an industrial dust collection system that has multiple pick up spots and I am desperate for some enlightenment. The original designed system has 28 pick up locations with the round duct size varying from 6" to 13". It was designed according to NFPA standards such that for each...
