Who else's Ionic Breeze smell?

Whoever has had experience with air purifiers…particularly those that purify using ion technology (Ionic Breeze, others) will notice that these particular purifiers emit a scent when used. I recently had the chance to experiment with a 3000 sq ft ionic purifier and when fully electrified, the smell was absolutely horrific and overpowering; metallic and awful. Could this be ozone? Thoughts?
Thanks guys. I just did some research. While experimenting with the machine, I looked inside. It was basically a metal mesh sandwiched between two electrodes. This is called the "corona discharge" method for creating ozone. This particular unit could be set so high it could sterilize a room. I can safely conclude it was ozone.