All fans pushing air into canopy is best. IMHO. Having 2 push, 2 pull, the max airflow is only going to be the sum of 2 of the fans capacity. Having all 4 blow in, and a natural vent at the top, well the flow is now the sum of all the fans CFM Plus, the fans that pull hot humid air will have a shorter live than the fans that push cool clean air
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Dan Pesonen
Umm, a tank or 5
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