Fans/filter Combo

OK so this question has been asked alot, but.........
I'm after a fan/filter combo that can pull enough air out of a small cab without taking up to much internal room. But it has to be internal to keep it stealthy
I swear I saw you could get 3inch filters and fans but the smallest is 4.
Would that be the best way to go? It seems abit overkill and would take up a fair amount of internal space

Here's what I'm working on

Computer fans are what I use but no filter.

I have a 80mm PC fan running ATM but its not pulling enough air even without a filter so need something abit beefier with a filter really

Google Panasonic whisper fan they are slimline and super quiet, then make your carbon filter go to the smell thread under indoor growing, have seen homebuilt carbon filter attached to the panasonics
P

pc fan homemade carbon filter, easy, small quiet

That is a nice cabinet, you going to need some holes. Check it out you will find that the 80 mm fan will recirculate that space quite nicely. I read 5 times per hour is fine. As a side note I've a similar setup that I've been running for 22 months. 10 harvests done 11 and 12 6 weeks into flower. Best of luck to you, put a little love in the world today !!

This is how I have it for now, the black bit at the back is a light trap with a 80mm fan in, need something with more ummphh though that filters as well. The lights are just bodged together atm untill my LEDs arrive Monday.