Well, you're not saying where you are getting your fresh air from, nor where it needs to exhaust.
Ventilation is pretty simple, it means moving air, you say you have an inline fan, how many CFM? calculate the cubic feet of your room and divide that by the CFM of your fan, and you have an idea how many air exchanges you are making. If you are using a passive exhaust (that means, just an exit, no blower fan), then it should be at least 3 times as large as the intake.
SpaceNeedle Reviewed by SpaceNeedle on . Need your help and advice on vent design I have a room 14.7'x7.54'x8.26' in feet or 4.37x2.3x2.5 in metres. You can see on the pic. Iwant to design the vent path over this growroom. I have powerfull inline fan, but have no idea how to line ventilation ducts to maintain air flow through plants and hps cooling . Please feel free to draw on the pic. Thankyou Rating: 5