I have multiple units around my house , and I can definitely feel the difference of them being on . Fresh air is so important when you have allergies and live around a bunch of trees and wild life. .

I’ve had this for years now and it’s very durable. I keep it in my bedroom and it sounds like a fan running it’s a nice white noise sound that actually helps me sleep. The filters are easy to purchase and easy to replace.

What I love about this product is that it does its job. It eliminates the nasty air smell,has a simple dial to control the level of airflow, and a button for the UV light. The replacement filters are affirdable.