I have used the old version since 2004 when I purchased one in Taiwan (where these are made). At the time they were exhaust. I took it apart and converted it to an intake with a self made filter (2 layers of dryer sheets). Early this year my Dominator RAM fans died so I decided to convert that fan back into exhaust as my RAM fan.
I cut off the 5.25" bay mounting holes and most of the plastic, glued it to an aluminum sheet and used the Dominator's slot clamps to hold it in place.
Here's the dryer sheets that I made for a 23CM fan. I would recommend using new sheets. First you want to wash them out with hot water to remove the dried liquid in the sheet. You want to keep crunching them up and do this for about 1 minute. Afterwards let it dry out and just stretch it to the size of your fan to install. Whats great about dryer sheets is that they pull dust out of the air that passes by instead of forcing dust to cling to the filter like most do. It's cheap, disposable and the only option I can think of for a large diameter fan.
The new ones look like they come as intake. However without removable filter on it many people would shy away from it. But if you are handy with tools you can just reverse the fan. And be careful of bending the blades they are made of very malleable aluminum. From their description they are now using ball bearings instead of the sleeve bearings of the first version. This should make them run quieter and last much longer.
I may actually end up getting another one of these and modify it for a side intake for my case.
