Just ordered one, and also a Dylos DC1100 particle counter. I'm often in Shanghai, and pollution can get pretty rough even if we have it better than in Beijing.

Just ordered one, and also a Dylos DC1100 particle counter. I'm often in Shanghai, and pollution can get pretty rough even if we have it better than in Beijing. I'll make sure to measure the hell out of it and see if it really works. :) Edit: I know the particle counter ($200) is 6 times the price of the air purifier, which can seem ridiculous; but to me it makes much more sense to do that than to buy a $300 air filter and just pray for the best while having no clue at all about what's really going on.