Ozone is being touted as a solution to indoor air pollution, when, in fact, it is a powerful oxidizing agent - much like chlorine gas. But ozone is also a toxic gas, a component of smog, with no known beneficial health effects. At that level, ozone irritates the eyes, makes the throat feel dry, and stresses the lungs. That's a sensible limit for the home. At sufficiently high concentrations, ozone attacks and destroys gas molecules and microorganisms.
Ozone has no effect on dust and other particulates, however.
And ozone generators sold for home use can actually foul the air. Given those facts, an ozone-generating air cleaner would seem a contradiction in terms. To date, Consumers Union has not found a unit that allows users to measure ozone output or to control ozone levels in a meaningful way. Some promotional materials say you can tell if ozone levels are too high when the distinctive odor becomes apparent. But research has shown that odor isn't a reliable yardstick.