air exchange

Does anyone know of or seen a type of powerless turbine vent? I'm running a passive intake and using the lower intake vent hole to pull the air in. I'd like to have a sort of duct tube that has a fan blade in it that can be ran off of the vacuum of the exhaust to help distribute fresh air...

I have a 4x4x80 tent setup with (2) 1000watt phlizon cree cob LED lights. AC infinity T6 that is pulling air out of my tent. I have a carbon filter, but I am not attaching it until I hit flower. At the other side of my tent at the bottom (opposite my exhaust fan) I have a HEPA shop vac air...