I purchased this air filter for my bedroom at my house. There has been one at my parents’ house for a while and it has been a big help in the downstairs room that the two cats stay in sometimes due to the weather. I have indoor only cats at my house and also have metal shelves in my room that have some kind of pressboard for the flat part. These boards put off a smell from time to time and it aggravates my sinuses. So because of that and the cats, I bought this air purifier. So far, it has done well. I have not noticed the wood smell anymore and the air seems fresher. My throat is not as dry and irritated as it had been. There are three levels. At night I run it on the lowest and it is fairly quiet and doesn’t interfere with me sleeping. I would recommend it. This is the second Miko my family has had and I will probably purchase another for my den area.