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If I had the dimensions I'd give give them to you, and if I could see the sticker we wouldn't need this thread >.<
But yeah, everything you just said is right, most people end up just getting a centrifugal fan so they don't have to deal with the back pressure issue, but I'd rather not have such a noisy bulky thing. I'll be pulling air through a layer of activated carbon air filter that's about .75" thick. I could have it half as thick but I don't know if that would filter the air sufficiently. I think I've got the entire filter designed, it's now just an issue of the fan.
The filter is going to be a cylinder, 4" diameter, 12" long, with 3/4" of air filter wrapped around the outside, and a fan pulling air through the filter into a 4" duct.
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