lol yeah, it wouldnt fit the other way...so i just have it facing the top exhaust fan.
although looking at it now, the rear case fan really serves no purpose. its air flow is gonna be blocked by the Tuniq
i'd say it does serve a purpose but not a big one. it's still going to suck hot air out of the case and off the heatsink a little bit. do you have a fan on the side of your case? i presume you have an 8cm one at the front. if you had one of the side of your case facing inwards then a balanced amount of cooler air going in would be possible.