What’s the efficiency rating on those filters
All the CATs are 99.6%, not sure on the air dog
2 micron absolute, not nominal
Which filters? I got b*tched out yesterday on FB when I tried to claim the CAT filters were 2um absolute. Did a little checking, and the 1R-0751 that I have used in the past is 4um absolute. Our CAT rep at work told me it was 2um so I didn't question it (they are a big engine supplier for us).
https://caterpillar.scene7.com/is/content/Caterpillar/C10467203