Bests & Worsts Reviews from Amazon

I’ve had this for only about a week. From the time I got it, the noise it made was uneven. Another reviewer described it very well, so it isn’t just me. It sounded like the fan would speed up, then slow down, then speed up again, but I managed to sleep despite the uneven noise. However today, when I was making lunch, I heard a really loud noise and it was loud enough that it was urgent to figure out what was wrong. It sounded like it could be a washing machine that was spinning off balance, but I wasn’t doing laundry. I checked the laundry room. Found nothing wrong. Checked back porch. Nothing there either. Nothing left but to check the bedroom and when I opened the door smoke was pouring out of the air cleaner and it was making a loud roar like a prop engine plane. I managed to move a heavy dresser away from the wall and unplugged it and got it outside. I’ve thrown away the box it came in so I don’t know if they will take it back. I hate to think of what the outcome would have been if I hadn’t been home. I probably would have come home to find my 2 dogs dead. I cannot recommend this and I consider myself lucky that it didn’t turn out worse than it did.