I bought 2 of these as my home needed a purifier badly, especially with a new baby. My house had some leak issues that led to flooding and to sum it up the basement of my home had a horrible sewer smell that reached all upstairs.  Totally uncomfortable and embarrassing to say the least. I can now breathe with no complaints and the whole house smells different. Definitely a necessity for those sick days at home and just needing clean air without relying on just windows.