you can find 6" vortex fans online for like 140
mushaboom Reviewed by mushaboom on . Inline Fan Decision Looking for a 6" 400+cfm fan, still undecided about which brand to go with, everything decent seems to be in $200ish range. I've searched but figured a poll would be alot easier to get opinions. I'll be running a speed controller for my 600w hps/mh to dial in perfect airflow and to reduce noise, and will be hung from ceiling mounted bungee cords. The closet system will go glass enclosed hood-> ducting-> fan-> ducting-> filter (unsure about insulated vs non ducting) with passive intakes. So Rating: 5