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by input_sh
1484 days ago
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They're pretty much all the same, just a fan in front of a HEPA filter. If you can get a square fan and tape a HEPA filter in front of it you'd get pretty much the same result as many modern air purifiers. You're paying for convenience and some bells and whistles (like a mobile app and an air quality reader), but the underlying technology behind it is pretty bare-bones, heavily tested, and heavily used in industrial applications. |
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