LOUD
I got this for my 100 square foot office, which has a lot of VOCs and other nasty odors and air pollutants. I find myself having fewer headaches, itchy eyes, and sneezing, but the unit is so loud, even on "whisper clean" mode. It emits a low hum that just hits the right pitch to drive me crazy. As a result, I only run this on high when I am not in the office, and turn it off by day. Not ideal in terms of regular use but works well enough I suppose.
Rating: 2 stars