This year, I plan to start buying ionizers until I have every room in my house covered. I don't know anything about them. Does anyone on here? Can you make a recommendation? What size do you need for a particular room size? Or will there have to be more than one per room. My living area upstairs is 'open concept', bedrooms are large, and downstairs I have a good size 'office.' I may get one to take to work for my office as well. So it would have to be fairly quiet. What say you, oh experts on pretty much everything?