Ozone attacks the odors created by smoke particles. Ozones main benefit is to de-odorize a room after the smoke has cleared. Afterwards, the room does'nt smell like an ash tray. So, turning up an ozone generator to remove cigarette smoke from a room simply does not work. Using ozone to remove cigarette smoke odors from a room works.
Filtration captures the particles.
We do not recommend ozone for cigarette smoke areas to remove smoke. We only recommend ozone for cigarette smoke odor removal. For smoke removal the best is HEPA filtration with carbon filter or Electronic Electrostatic with carbon filter. If water was to be allowed to flow faster past the UV, it would'nt be as effective in destruction of micro organisms. When this happens, you are getting a mixture of water that is filtered and water that is not.