Proper bath fan exhaust in new contruction
Building new home. Please excuse my laymen terms. We are at punch stage and 7 bath fans are exhausted out one roof exhaust cap or pipe or whatever you call it. Any problems with this?
#'s of fans as follows:
2 master toilet closets
1 humidity sensing fan in main master bath area for 2 sinks, air jet tub and shower.
2 for sink vanities adjacent to bath 2 with separate door separating from main bath (hollywood or jack and jill layout) (needed per code)
1 humidity sensing fan in main bath two area for shower and tub.
1 Powder bath
Additionally, I upgraded the fans and they call for 6inch ducting and as far as I can tell they took them down to 3 or 4 inch ducting and the runs are really long to the 1 roof pipe.
Please advise. I am doing punch walk with builder and I have mentioned my concern about this many times since they were first installed and it is yet to be resolved.