I bought this for my 1,000 sq ft apartment as it was constantly around 70-80% humidity. It successfully brings the humidity down to 55-60% and I have to empty it about once a day. If i set it any lower it runs constantly and must be emptied twice a day. My only complaints are that the compressor is very loud when it kicks on and off, and the beeping sound when the bucket is full is obnoxiously long. It would be great to have the option to turn the sound off altogether. [This review was collected as part of a promotion.]