What do you guys think of this air intake setup

So I’m thinking I can use this to get rid of my portable ac unit that I run in my room. Probably will only do this method during winter, which is more months vs summer in Colorado. I’m thinking using the good merv filters will make the outside air clean enough to use in the room.
Also I chose 6 inch because I have a spare ac infinity 6 inch fans that I plan to use.

Looks good. I’m cheap, I just threw a filter over the vent and added a duct clamp to secure it. Your set up is better of course.