This Conairpure small air purifier works great in a smaller area like a bathroom, office, next to the bed when sleeping, or while sitting in a chair in your own personal space.  It's small, sleek design makes it nice when sitting on a table or vanity.  The low setting is barely audible and the higher setting works stronger, but is louder but not annoying.  It does the job for a small area but I don't think it would be beneficial in a larger room to get the purification job done. I would definitely buy it again if I wanted to put more in smaller areas of my home like the baths or kitchen nook.