I am just gonna just tell you how I did..
I have 2 x 120mm Antec fans with 3-way speed controller and I have 2 NL in a small cabinet.. It's ok.. That's what I can say..
I have 6 x 42w(150w output) CFL in flowering room.
[ vent duct -> Intake fan(about 100cfm) -> Exhaust fan (about 100cfm) -> vent duct -> Air scrubber(additional 250cfm fan) ]
I worry about in summer.. I have no choice but buying small wall air conditioner and convert it to portable version..
I have no idea how I am gonna do~ :thumbsup:
Good luck on yours~