That filter/grill is #11 in the table - I have about 20 of those in silver and black (impulse buy before I really knew what I wanted... even then I didn't know which color to get, so I got both). The hole size is actually larger than the openings in the 24 x 24 mesh, so I wouldn't expect it to keep a lot of dust out, tho it should do a decent job with pet fur. A nice layer of pet fur over the filter will probably help with the dust.Originally Posted by Utnorris
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