This product saved me from serious health problems I was having from environmental allergies and toxins. I work in a very toxic printing mill and was beginning to feel the effects of it daily - getting vertigo from the toxins on a daily basis - so I recommended to my boss to replace our old air filter with the rabbitt 2, which I have at my home. Immediately I felt relief and my dark circles have gone from under my eyes. this feels healthy and is the best filter I have ever tried - by far! It is so good that it has an air quality indicator light which, when someone walks into the door (10 feet away from it) who has smoke smell on his clothes, the red light goes on immediately....but quickly turns to blue showing that it has cleared the air.