thats what i thought ( i think we covered this last year in my A+ cert class in college) be he wanted me to double check. also he has a CPU duct much like this case. case
he also said about mounting it on the outside. but i would have to buy screws and a fan filter. i think it a waste and the filter mite hinder the fan duct. but the man's a business man and he doesn't want to waste anything. and in him being like that i told him i will look for all options.