it depends on how large of one you get. Ozone in high concentrations is not good for you at all or the plants. You can run it on a timer either in or out of the room. I would just use a carbon filter. I have an ozone gen and it works great but only use it during harvest. Also use it to clear out any smoke smell since we both smoke cigs.i read the post on it but still cant figure out if its in the basement in diffrent room of the plants and on all the time wiil it harm me or the plants