Inline-fans

Hey

i'm looking for an inline fan found one here
http://www.growtents.com/products/4-INCH-190CFM-INLINE-EXHAUST-FAN.html

it is a real inline fan not a duct booster but only rated at 190 cfm will that clear my 4x4x6.6 growtent of air and suck in ac'd air through passive intake?
or do i need more cfm?
Thanx

The tent is about 105 cf so it will work to exhaust, depends on how much air you want coming in. I use a 6" with a speed controller

i have a 4x4x7 tent and i use a 400cfm 6" and it's just enough to actually draw are through my hood and pull in a/c air passively

thanx for info guys, i mayaswell throw the xtra few $ in and get a 6" at aboiut 450 cfm, i have beend doin it half assed but i'm starting to notice maybe bits of stunting cuz i have had some issues with heat