You go into a room that hasn’t had folks in it for 10 years and there is dust everywhere. I thought it was skin cells but obviously not.
Even rooms with no access to the outside have dust.
In: Mathematics
Try the Blueair air cleaner. I have all my windows open when weather permits and it has taken care of all the crap that was floating in the air (visible to the naked eye). I run it 24/7 and my hepa filters last one year.
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