I'll second Opie Yutts' warning on air movemment. Even though some of the larger fans (120mm+) are rated around 100CFM, that is a very liberal rating and is not even close to what you will realize in an inline setup. Even if they did work well, you have to find a DC transformer to wire it up and by the time you pay for all of that, you could have bought a cheap, $30 inline AC fan.