We bought this about a month ago and am amazed at how much has been filtered out of our air. Whether it's smoke from frying in the kitchen or from our wood heat, the unit detects and picks up speed to filter the odor and smoke from the air. Love the option of being able to choose if I want the ionizer or uv to run or not. We are so impressed with the PureZone Elite Air Purifier that we are going to put one in our bedroom as well. It is so quiet, it won't disturb our sleep. Would highly recommend to anyone wanting a quality Air Purifier.