There is a significant down side to air cleaners which release ozone
as do, I believe, most if not all ionizing air cleaners.  Ask any
respirologist and you have very good chance of being told that ozone,
even in low concentrations, is detrimental to the delicate tissues in
the alveoli of your lungs.

Of course there are situations where it can't be avoided but we just
have to live with that.  I know that, if I have a choice, I'd rather not.

Jim Heyworth,
Sechelt, B.C., Canada