This product works well for very small space. I used it in my office which is slightly larger than the recommended size. I work in an older, dusty environment that has lots of shelving and dust and such floating around. I have allergies and asthma and could definitely tell the area in my office smelled fresher than the rest. It is a little loud on high which worked better than the low but it reminds me of the white noise I use to sleep so it made me kind of tired lol. All in all I would recommend it and the battery lasts a decent amount of time on low.