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OfflineFungi_x
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Re: My Flowhood is Complete [Re: Kernale]
    #26913454 - 09/02/20 09:40 AM (3 years, 5 months ago)

Quote:

Kernale said:
I've read that 99.97 is good enough. But if you're right you're right, I don't know for sure. Either way here's one https://www.spycor.com/99-99-HEPA-Filter-Metal-Frame-24-x-18-x-5-7-8-p/maggb2418a6ax.htm still cheaper but not as good of a deal. If you don't need that specific dimension they can be found a bit cheaper too.

I guess in theory 99.97% at .3 microns isn't good enough. But I would think that .02% is small enough that you are still extremely unlikely to get a contamination. But I don't know because .02% of billions of particles is still a lot of particles. I would have to test them both side by side with open plates to see contamination rates, so I won't say anything definitive.

Heres another 99.99% from another site at $177 before shipping, https://damnfilters.com/collections/hepa-and-other-high-efficiency-filters/products/hepa-filter-24-x-18-x-6-600-cfm-99-99-particle-board



I found the name of the effect it's the calendar effect are coriander effect coriander it's one of those or none of them but it gets you closer to the answer there's a very good demonstration by this one dude where he takes laminar flow and he moves it towards a wall which introduces turbulent flow and it actually sucks dirty air in from the sides around the flow head into the clean stream of laminar flow.


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