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I'm looking at exhausting 2 rooms individually, each are approx 2'x2'x4' Would a couple of DIY filters like found here: https://www.rollitup.org/do-yourself/101248-best-diy-ez-walmart-carbon.html with a 120mm 74cfm computer fan for exhaust work? 1 fan for intake and 1 for exhaust + filter on...