I live in an older home and have done some updates and added insulation. As a result, before buying this air purifier, I was plagued with a stuffy nose and cough each morning when I awoke from residual dust. Since using this product, I have awakened with a clear nose and no cough. It is on my dresser top and is very inconspicuous. It has a low hum which supplies some soft white noise which helps me to sleep better. I'm so glad I bought it.