This is the 6th PureZone I have purchased. My eye doctor was using it in his office because of COVID. I bought 2 for job and they did a great job. I bought 1 for my home and 1 for my sister and another 2 for our fitness center and another office.
                    They are quiet and don't take up a lot of space. They make a real difference with
                    the particles in the air and keeping allergens down. I change the filter a little more often that recommended.