I am pretty sure it is supposed to be setup pulling the air through the carbon filter and venting outside the tent to work properly. Like so,
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It works that way, it works pretty much every way. That's all we've been saying. If you have empirical evidence that says that one way works significantly better than the other, a few people would like to see it. Everyone who has contributed so far has said they don't notice a difference no matter how you run it.
Case in point, the way you have it set up is not the most effective. Since you are up high, you can take that sleeve off, & it becomes more effective. The life span may be a little shorter...
But the point is, your nose won't be able to tell the difference.
If you are pulling like Laz pictured, I don't see the reason for the sleeve at all. So long as the air flow is strong enough, no negative charge will be strong enough to overcome the air pressure.
But the same point applies (I've done it every possible way) my nose doesn't notice a difference.
It's like driving your car with optimally inflated tires. Sure on paper maybe it makes a difference, in real life, you aren't going to notice a gas mileage difference because your tires aren't optimally inflated. (we are still waiting to see someone come up with proof either way. No one is saying there isn't a correct way to run it, just that we haven't noticed a difference)