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    How many CFM to cool 400w HPS? Help

    I have a DR80 which is 2.8 x 2.8 x 5.3 & a 400W HPS to put in it. I am looking into inline fans and I was wondering what would be a good enough CFM to pull through a carbon filter & cool tube and make sure the tent doesn't get to hot. I was looking into a 170 CFM 4" inline fan. Think this would...
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