Those fans are not truely 200cfm. I don't know how they get away with that, but if you buy a expensive in-line centrifigual fan, you see what I mean. Those HD fans are as quiet as it gets though.
snow owl Reviewed by snow owl on . fan help ASAP i have been using a 4 1/2" 12 volt computer fan and i was told that it is not good enough for my growbox which is 4'x2'x2'.today at HD i found a in-duct fan that is 6".it is 250cfm.do yall think i should get that.would it be too powerful or too loud because my growing has to be super stealth.thanks a lot Rating: 5