i can't give you any specifics but it appears to use a pair of 80mm fans that exhaust directly out of the back of the system. basically it is not a standard HS/F. if you would like to see the fans to get a better idea, open the cover and remove the green shroud that is connected directly to the back of yuo case. i wish i could show you what i mean but unfortunatly those images are not viewable by the public.
BTW, if this voids your warrenty, i am not responsible.