[quote name='shieryda']
If you have a furnace, be sure to change the filters on a regular basis in that, too. That makes a huge difference.[/QUOTE]
Exactly what I was going to say. Buy a good filter for your furnace as a first step before getting an air purifier. It will make more of a difference and at a cheaper cost. (You can get a great 3M filter for $10-30.)
Consumer reports has done tests of these things and found that the Ionic Breeze (and other purifiers of that type) don't do diddly. I wouldn't waste my money on that particular filter. If you are going to get one, get a HEPA one.