The only time you hear it running is when it is on high and the only time it's on high is when the air quality is bad. I have two cats and when they scratch themselves you can see fine hair come off of them. The air purifier clears the air pretty fast. I'm very happy with this purchase.
I spent a long time searching for an air purifier. This was more than I wanted to spend but was well worth it. It's auto mode is great and it does a great job of keeping our air healthier.
If you need further help or information please visit our Online Help Center