The best feature included on the Air Purifier is the UV light which destroys germs and other harmful particles in the air (rated to last 3 years of constant usage). Although relatively small, about the size of a desk fan, this Air Purifier can move a good amount of air and will eventually cycle through all of the air in the room it is placed in, essentially sterilizing the air you breath without introducing chemicals. Another good aspect to this is that it doesn't really do much to cool the air so in the spring and fall when its to cold outside to crack the window but not hot enough to warrant putting a fan on, this purifier will still move the air around and keep it from getting stale. There is a timer built on which will prevent you from accidentally leaving it on for a long period of time as well. Overall there a subtle but noticeable difference in air quality after using this product.