Well darn. I just know what it was he used. Never really looked into the unit other then it works great for him. I know that when more of us fill the room he turns the speed up. I never got the idea that is was Ozone but looking closer and at the manual it is. However it would seem that he has that set on a low setting. I will just stay with my system. No one likes the Oreck XL however I like my system and seems to have always worked for me. Sure I have to take 2 hours every week or 2 and soak my plates to remove tars and what not that has collected over normal dust. It does work. I do also as one of my other threads has touched on have air exchange set up for my place that I use with heavy use. Most times it is just my Orecks. Just keep telling my self that i want to get rid of them because others don't like them and the only replacement if needed for it anymore is the Truman Cell, they no longer carry the rest of the parts that made me buy this Air Purifier to start with. I have a problem with people making something and then not supporting the product anymore gives me the idea that they want me to buy a new one with the features that I want and what i spent for this to start with. I'll Pass, Thank you for making that clear. The Nub. That is extra tobacco money i can spend then
James