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If you're interested in buying an air cleaner that uses ionizers, make sure it does not produce dangerous levels of ozone, a gas made up of three oxygen atoms that is often marketed as helping ...
According to lead researcher Sergey Nizkorodov, a chemistry professor the University of California, Irvine, "ionic air purifiers do emit ozone. [But] none of the ionic air purifiers produce enough ...
In September 2007, the California Air Resources Board announced a ban of indoor air cleaning devices which produce ozone above a legal limit. This law, which took effect in 2010, requires testing and certification of all types of indoor air cleaning devices to verify that they do not emit excessive ozone. [48] [49]
Ionisers tend to produce negative ions since these are supposed to have beneficial health effects. Even the best ionisers will also produce a small amount of ozone—triatomic oxygen, O 3 —which is unwanted. Ozone generators are optimised to attract an extra oxygen ion to an O 2 molecule, using either a corona discharge tube or UV light. [8]
Worse than that, they release low levels of ozone that can be harmful to breathe in. Try this instead: Steer clear of ionic air purifiers and use air purifiers that have a HEPA filter to grab ...
Ventilation with outdoor air containing elevated ozone concentrations may complicate remediation attempts. [69] The WHO standard for ozone concentration is 60 μg/m 3 for long-term exposure and 100 μg/m 3 as the maximum average over an 8-hour period. [29] The EPA standard for ozone concentration is 0.07 ppm average over an 8-hour period. [70]