> Air purifiers do not filter dust and should never be bought for that purpose. What? What do you call the particles it filters, if not dust? Of course you ca

> Air purifiers do not filter dust and should never be bought for that purpose. What? What do you call the particles it filters, if not dust? Of course you can do with a prefilter which filters out larger dust particles so they don't clog your finer filter. But most air purifiers come with that from what I've seen.