I believe that he was commenting on how the air flow should go. It depends a lot on how the whole systems air flow is setup. I have an exhaust fan that sits perfectly above and to the left of my HedgeHog (same as Alpha, but all copper), so that makes it perfect for having the air being sucked off of the heatsink. If you just have the power supply as an exhaust fan, then positioning the fan so that it blows onto the heatsink would probably be the best. Thats just my experience though. Your results would probably be different. Also, you have to make sure you take the shroud off when putting the fan on to blow onto the heatsink.