Alen Corp.: I bought a BreatheSmart and installed it in my teacher/ daughters classroom which she is allergic to. It has been 30 days or a little more now and my daughter shows much improvement with her eyes and sinuses. It will be interesting to hear what her allergy specialist has to say. Some of the mothers of the children have commented how their children are breathing better. Other teachers drop in just to get a breath of fresh air!! Do you think that I should leave a can by the door so they can leave donations?? (Joke). Yes it works and you should see the gluck it takes out of the air. A Happy Father & Mother.