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I am so frigging sick of breathing garbage air.

We got a HEPA filter for my spouse’s office & my kid’s classroom, both are home for the summer, and we already had two, so…we now have •four• HEPA filters going full blast in the house. My particle counter says they’re reducing ≤0.5µm airborne particles vs outdoors by a factor of 14. I mean…14x! We’re very fortunate! But I like being outside in the summer. Also, it’s really loud in here.

@inthehands may I ask - the HePa for the kid's class room -- what size is that? Because I imagine if all kids bring a normal sized filter that would probably overkill. But if it is a cup size portable - what use are those?
(Thinking about getting one for long train rides that are coming up, but can't find studies if they are useful for more than alleviating cigarette smoke in cars...

Paul Cantrell

@bleistifterin
My inexpert guess is that one of those is going to be more or less useless in any space larger than a closet, and you’ll get far more benefit from an N95 mask.

(Its CADR is ~20x lower than the HEPA filters I linked to above.)

@inthehands yes, I agree.

I do have some pretty long (8-10 hours) train rides coming up, I'll have to unmask some of that time (eating, drinking) and hope springs eternal... But I doubt the thing will be able to build up a clean air wall around me. I'll have to risk it