Exhaust Fan DOA. Ac Infinity?

My exhaust fan has apparently called it quits. Checked on the ladies and the walls went from being sucked in slightly to being swelled and about to bust. I have a 2x4x7 tent and wondering if a 4 inch will have enough power or if I should go up to a 6 in. The vivosun is a 6 and had no problems but did not cost what the ac does. T.i.a

4” wont be enough even without a filter. My 4” could barely cause negative pressure on a 2x2 tent I had. It works real well as an intake fan though. Whisper quiet.

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Do we have this handled in the other topic?

Yeah. I don’t think I need anymore info unless someone has one installed in the same setup