I had this fan for a whole week and while the concept of it was good, the smell that it made was terrible.  I live in an apartment and it made such an awful smell that filled my entire living room.  I don't know if it was the air filters or something else but I could not keep this fan as it was giving me a headache.  For something as expensive as this was, I could not justify keeping it only to have it remain off for most of the time.