jimjim2609
Well-Known Member
Puff, I would assume the pre-filter packs are used to stop dust so it doesn't clog up the filter element.Thanks, p! I've been eyeing a certain 4" fan for a while do that's good to know I can find an adapter.
Brother dawg, this may seen like a dumb question, but what are the pre-filter packs used for and are they necessary? The website could use some more details.
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