I bought this on recommendation from a friend. I was surprised how quieter it was then the Friedrich I had (believe it). I would have given it 5 stars but the front grill does rattle making noise. I had to keep one side of grill detached  and that stopped the rattle along with some sound deadening tape.I do wish it had another lower fan speed speed which would have made the unit noise level even lower,like 44 db or so.