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I am legit wondering if air purifiers wouldn't be a good addition in preschools. A classroom isn't that big and one of these things would probably be enough. A school year would require 2-3 replacements, ie. not much.

Anybody did something like this?

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Yes. Especially since covid.

This was just the first link that came up, but there was state-level funding going back to 2021 at least for this in some places.

https://www.pbs.org/newshour/health/how-covid-funding-could-...

I knew that but funding was for big ventilation. I wonder if any of these home-use devices have been deployed and if there's some data with comparative results.

At the schools my kids were in, they deployed commercial-looking freestanding units. I don't know if that was intended to be a temporary measure until they got central units installed.

I haven't seen any data, agree it would be nice to know.

I don't know how it went, but I recall that improving ventilation and filtering in schools was pushed among the many Covid countermeasures.

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