For a room that size you likely need more CFM unless you have an AC in there or the ambient temps are really cool. I see you are in a metal building and it's not insulated. If you are drawing your intake air from in there it may get pretty hot.Well I decided to change my exhaust setup I already had a 6” vortex s line fan just laying around and my 4” filter is pretty old so I went ahead and installed the 6” vortex fan and ordered a ipower 6” carbon filter so as of now my passive intake is 2-4” holes I might have to drill out 1 more 4” hole to help recycle air faster.