One thing your Ionic breesses do well it output ozone, o3, Google
Ozones harmfull effects, if those units are very close to you it might
be an issue, second hand smoke is now a proven concern.

Over possible future liability concerns Sharper Image has put on a
catylist to convert lung damaging O3 to Oxygen, but a simple look at the
design will point out likely 60% of the O3 air does not go through them.
Junk your ionic breeses they don`t do enough anyway. For a full review
of air filters look at Consumers Reports testing, and the lawsuit they
won againt Sharper Images Ionic breese..