but even in a 4x4 tent i would run a 6 out and a 4 in....even with all the vents open on a tent i could never get enough intake air to keep the sides from sucking in badly...but with a 6 out and 4 in with a 4x4 tent i had a nice balance with enough neg pressure to suck the sides of the tent in just a bit...
on my main flower room which is 12x8x7 i run two 6x24 carbon filters on 6 inch active air with a 6 and 4 inch fan for intake...that keeps the smell well contained in the room and so far seems to keep the plants happy...gonna upgrade to a 8x30 carbon filter and 8 inch fan for one of the fan filter set ups though....glue stinks....
on my main flower room which is 12x8x7 i run two 6x24 carbon filters on 6 inch active air with a 6 and 4 inch fan for intake...that keeps the smell well contained in the room and so far seems to keep the plants happy...gonna upgrade to a 8x30 carbon filter and 8 inch fan for one of the fan filter set ups though....glue stinks....