Seems to work but 1 unit was DOA
I ordered this unit, because our son had a cough for way too long. The first unit that arrived was DOA and no UV light was working inside the unit. Amazon replaced it without any problems and the 2nd one seems to work. I am not sure if the cough disappeared due to this unit or due to other measures, but it's possible that this helped. The big downside of this device is the noise. I am noise sensitive and I can't use it in the bed room at night.
Rating: 3 stars