Don't mind what is pushing what is pulling. That's all perspective according to the air flow. That is common sense, if you can't figure that out on your own, that's to bad. I'm more using the term push-pull than putting the words in order.
That's like if I'm trying to explain exhaust vs intake, and I show the exhaust arrows in the wrong direction. If I add an extra arrow does it make more sense? Exhaust = (⇇Push⇇Shroud⇇H50⇇Pull) - Intake (Push⇉H50⇉Shroud⇉Pull⇉) Push and pull is perspective according to the air flow. Do I really have to further explain this? Sorry I do stuff like this for a living, what might be common sense for me, might be new to you.
leppie Aslo you set up your H50 wrong, it should be in exhaust.