Even if it does use some form of ion-trapping technology, it's going to fuck-up your lungs and other mucuous membranes with all the ozone it produces.

Plasma-chan indeed.

Edit: I've heard from an acquaintance that it actually does work, but it uses a conventional HEPA filter (basically a very fine-woven mesh) instead of any new-fangled plasma technology.

I will just put this here:
http://europepmc.org/abstract/med/16940742

http://www.epa.gov/iaq/pubs/residair.html#Types-of-Particle-Removal-Air-Filters