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A comment on Experiments on a $50 DIY air purifier (2020). Parent comment

Re:Experiments on a $50 DIY air purifier (2020) by akozak on Thursday September 02, 2021 @01:47PM (#28395100)
You just need to increase the total area of the filter material that the fan is pushing air through. I've seen people shape them into a triangle or box with plastic/tape over seams or openings.
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Re:Experiments on a $50 DIY air purifier (2020) by fighterpilot on Thursday September 02, 2021 @03:07PM (#28396021)
Do we know how the air flow improves in proportion to surface area? I assume it's not quite linear. It would be good to know whether it's worth the effort to do what you're describing.
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Re:Experiments on a $50 DIY air purifier (2020) by akozak on Thursday September 02, 2021 @05:33PM (#28397656)
I'm sure there is an answer to that but this is DIY, so maybe just touch the fan while its been operating for a while, say "damn that sucker's getting hot!" and add more surface area until satisfied you won't burn your house down.
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