Fog Chiller Induction Blower

I built a beer-cooler fog chiller but the cooled fog just eeks out, and I wanted to get it the fog moving more efficiently.

This Induced Fan duct is made to slip-fit into a 4" PVC pipe (I have a SCH 80 PVC pipe as my fog chiller's outlet duct), and with 2 USB-powered fans from you-know-where, it creates an impressive draft to draw the fog from the chiller.

When moving fog, you want to avoid turbulent flow. The fans blow air into the duct, straightening vanes straighten the air, internal vanes draw the fog into that airstream and expel through the outlet.

I started with one fan, wasn't impressed with the output, and decided to make a splitter (largely because two fans came in the package).

I noticed that the fans weren't terribly efficient at drawing in air, and could tell that they blew air around at the suction as much or more than they were drawing in air (weird, I wondered if the fan direction was reversed from what an engineer would have recommended), so I created the inlet d