okay, first off, chill the hell out, if you get this upset over a stupid fan, you are gonna give yourself a heart attack. I had one of those cheap plastic bladed 6" supposedly 240cfm fan, and when I put the cabinet fan on the other end, the 6" fan damn near stopped spinning, The distance between the end of the blades and the shroud are what makes a fan gain suction power. Look at the design of those cheap fans and llok at the gap and then look at the orion type fans as there is almost no space between the blades end and the shroud = capable of more suction. So before ya go off on me again m8, do some homework, I have ocd and will take this to the point where you will understand, even if I have to use construction paper and crayons.
Peace
Asmallvoice