I live in Los Angeles, near all the freeways. Brake dust is a concern. I hear that stuff can get under 1 micron in size, and all the air purifiers I see on Amazon seem to miss anything smaller than 3 microns.
Anyone else interested in this issue, or have some advice for finding the best damn air purifier money can buy?
Submitted September 02, 2017 at 04:25AM by Devilled_Advocate http://ift.tt/2wrO7KE
