Just so everyone's on the same page here, 2 fans in a push pull config will only push the fan rating. ie, 2 50cfm fans in a push pull, will only move 50cfm. Now, put them both the same way, Pulling air, or pushing, with adequate inlet/exhaust. They will now combine to equal 100cfm
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Dan Pesonen
Umm, a tank or 5
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