If you're going to build something new put a good filter in there.
The cone or K&N cotton gauze style filters are good for flowing air but suck at filtering dirt'
This uses the The Donaldson P610875 PowerCore Air Filter and pulls cold air from the area you're looking at.
( https://shop.donaldson.com/store/en-us/product/P610875/35225 )
Lots of information on the internet about the particle size that gets filtered out VS CFM air flow on both the K&N and Donaldson Powercore filters.
The cone or K&N cotton gauze style filters are good for flowing air but suck at filtering dirt'
This uses the The Donaldson P610875 PowerCore Air Filter and pulls cold air from the area you're looking at.
( https://shop.donaldson.com/store/en-us/product/P610875/35225 )
Lots of information on the internet about the particle size that gets filtered out VS CFM air flow on both the K&N and Donaldson Powercore filters.