Bought this for my home office and the lack of filters is the best part—no ongoing costs, just plug it in and let the negative ions do their thing. The UV-C light noticeably cleared up the stuffy smell in here after a few days. For a small room of about 150 sq ft, it's been running quietly and I fee
I was skeptical about whether a filterless purifier could actually make a difference, but the negative ions have noticeably cut down on the stale smell in my home office. It covers my whole 12x14 room easily and runs quietly enough that I forget it's on until I walk in and the air feels fresher.