Passive intake for 2x2x4 tent? Bigger intake or smaller?

Bulletproof_Love

Well-Known Member
Currently running a 4 inch duct fan exhausting air out of the tent pulling it through a carbon filter. From my understanding, I was lead to believe that intake, the holes allowing the air going into the tent, were supposed to be smaller. However, I'm now reading further and it says that it needs to be double. So would I open up the holes in my tent? I could also open up some of the mesh windows on the side.
 
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