burnt out after a few weeks
I noticed that the devices are loud, louder than you'd expect.  Its an annoying buzz, where you'd imagine you'd just hear air moving.  Anyway, they worked for about 3 weeks then the fans burnt out.  The UV lights still work but the fans both stopped working, and the units got really really hot.  I pulled them out because I was afraid they'd go on fire.  I'm returning them for another brand/model.
Rating: 1 stars