Did you notice the dip in the last graph? No affiliation or endorsement is intended or implied.
But, even if such particles escape from one gap, more gaps and fibers are waiting for them.
Using the worst-case particle size results in the worst-case efficiency rating i.
In Europe, a filter only needs to capture 85 percent of particles sized at 0.
The others have fiberglass as their building blocks.
Some even sound like small lawnmowers! Even your search for the Best air purifier would be directionless otherwise.