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by settsu14 hours ago |

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by jerlam11 hours ago|

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There's an Airfanta 4Lite which uses laminar flow to achieve that:

https://air-fanta.com/products/airfanta-4lite

However, testing seems to show that the clean air flow is neither wide nor far; it would only be effective right next to your face and you can't really move:

https://www.reddit.com/r/Masks4All/comments/1di1n4t/can_a_po...

There aren't a lot of use cases for it.

by jefftk10 hours ago|

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My aunt is immunocompromised and carries one around with her in crowded situations, keeping it pointed right at her face 8-12in away. It works well for her, especially since she's had a lung transplant and doesn't do well with a mask.

by JohnBooty14 hours ago|

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I have seen models designed this way! Vornado used to make one, I think it's discontinued.

These directed-air "personal models" make a lot of sense to me... at least in theory. I haven't seen them properly tested.

The big air purifiers work great.. if the room is closed up. But their effectiveness approaches zero if you have the windows open or otherwise have unfiltered air entering the room. Which is kind of important, if you don't enjoy breathing in sky high levels of CO2. (If one's allergies are bad enough, or a wildfire is raging outside, CO2 might of course be preferable to particulates)