I think you may have found an error in the table, Leo. I'll pass this on to the author.
<br>In the full table (XLS or PDF), you'll find that data reads 3.9 dBA and 13.2 CFM, which is still impossibly low, given the residual noise that any fan would make regardless of rpm.
<br>I don't have a 8412N/2GL to compare, but I do have one PApst 8412NGL sample (only one, however...) that is rated at 12 dBA, compared to the 21 dBA of the Panaflo. IMO, without any measurements, I don't believe there is a 9 dB difference between them. What I hear is that the Panaflo bearing has more broadband (sheeeeeeee) noise than the Papst, and also a higher pitched whine. It spins faster. But the Papst vibrates more and has some ticking/clicking noise. Airflow? pretty similar, I would say, but at 5V, the papst is not usable -- no airflow at all, and iffy on startup.
Mike Chin, SPCR Editor/Publisher
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