After 2 weeks with this air purifier, I can say that the results of actually cleaning the air are minimal. The fan is very underpowered and barely moves any air. The filter itself is dark which actually prevents you from seeing any actual dirt and debris being filtered. I use this purifier on high because all the other settings emit a very low frequency whine noise which is unbearable to sleep with. I purchased another competitors purifier and it does a much better job. I keep this on in the corner now just cause I dont want to waste the money, lol or believe I didnt. Use your money on a better purifier...