I bought this to clear the air of cooking odorsespecially those that tend to linger, such as smells from searing or sauting meats, cooking spicy stews, etc. This clears 500 square feet or so in just hours when set on high speed for six or eight hours. In the morning, the air is always fresh. The rise in my electricity costs has been minimal, because I don't use it every day (less than a dollar a month). I have only had to replace the filter once (easily done) in two years. It has an effective sleep mode that is quieter than a whisper, and its light weight make it easy to move. I am very happy to have purchased this. (I ordered it directly from Levoit.)
Rating:
[5 of 5 Stars!]