By SaigonNezumi (Kevin)Monday, October 24, 2016China, Shanghaiair purifier This little guy can clean the air of a small room in about 3-5 hours. Just leave it on all day and the room will be 50 AQI. Not bad for $30 USD. The filter lasts three months. ? Share this:EmailTweetShare on TumblrLike this:Like Loading... Related posts: No related posts.