Air Cooled Reflector Setup?

Alright, newb question here. I'm having a terrible time figuring out where the charcoal filter/odor scrubber should go.

Is this order correct?

Duct --> Intake Fan --> AC Reflector --> Duct --> Charcoal Filter (air expelled outside)

Would I need another fan (lower CFM than the intake fan) to help full air through the charcoal filter?

Normally it would go; Filter=light=fan=out.
Ducting can go wherever but try to keep it short.

Here is how i have mi e currwntly and it is working well. Filter>fan>duct>light>duct exiting grow area.