While ionizing air purifiers are very effective at disinfecting air, they should be used with caution, as they can also produce harmful ozone. Ozone is found in the Earth's protective layer. This “stratospheric ozone” helps us stay healthy by filtering out harmful ultraviolet radiation from the sun. The astonishing information about the potential dangers posed by ionizing machines in their environment is frightening.
The emission of ozone to the air you breathe is not only hazardous to health, but also to the air quality of the environment. Several studies have shown that air is not purified with safe levels of ozone, since it cannot oxidize air pollutants to this level. Most room ionizers produce hazardous levels of ozone and produce more concentration in the room. However, some room ionizers have built-in controllers to prevent ozone levels from exceeding safe limits.
A further concern is that continuous exposure to ozone attenuates the sense of smell. Since the conflicting data associated with the ionizer remains persistent, I usually keep my ionizer option turned off. These ionizers turn on for 8 hours every day, and I have a Therapure TPP300D with UV+ ionizer that turns on for 8 hours in my living room. However, to get rid of the dangers of second and third hand smoking from my roommate, I now plan to keep my ionizer turned on only for 30-40 minutes when no one is in the room, and then turn off the ionizer before anyone comes in.
Air ionizers are designed to help provide cleaner air and they do so through the use of ionized particles. Ionizer air purifiers are generally safe because ionizers aren't energized enough to be harmful to you. As more information is disseminated and presented to the public about the dangers of air ionizers, the more informed consumers will be before purchasing an air purifier, and they are likely to be aware of and avoid these potentially hazardous ionizing air systems.