Bests & Worsts Reviews from Amazon

I liked everything about the AC4825, but unfortunately I received a unit that emits a toxic odor, as some reviewers have noted. I think burned plastic probably describes it best. It is more than a "new plastic" smell. And not a pleasant odor like a new car smell. It smells toxic, and for me, the odor never dissipated. Looks like this is called plastic off-gassing. Some reviewers have said that the smell goes away after a few days, but it never did with mine. I ran the unit for five days with uninterrupted operation and the odor did not improve. Maybe it would have disappeared if I had run it longer, but after five days, I just didn't feel good about it. If anyone is interested, I returned this unit and purchased a Honeywell HA200, which is $164 on Amazon. Costs more, but it is far superior to the AC4825. Much better quality build, covers twice the area (still one room), much quieter, and the air out of the unit smelled very fresh from the first minute I turned it on. It uses two HEPA filters side by side to cover the larger area, which I think together are around $40, so I little more than the one $34 filter for the AC4825.