I don't notice a difference whether the Ionizer on or off, but the dust surely collects in there. It suggests to replace the filter every few months (even with continuous usage), but in my experience so far, the colored indicator (gray-scale paper sticker) shows that the filter is ready to be replace every month (and we keep our place pretty clean... I don't know where the dust comes from).
By the way, when ordering the replacement filters (which can get expensive), order 1 carbon filter for every 2... more info
Removes Smell:
I was looking at different options before running into this deal.
At $44 bucks I couldn't pass it up. We have had it about 3 months and so far so good. I actually really got to test it after my wife made some fish for dinner. I moved the unit to the kitchen and put it on high and didnt' turn on any other fans. It really removed the smell. By the end of dinner the kitchen smelled normal. I haven't replaced the filter yet but that is where I see the extra expense is going. For the price, I... more info
Great air purifier!:
I purchased this air purifier despite some bad reviews. I'm so glad I didn't pay attention to the bad reviews. It is absolutely wonderful and does a great job. I really wish I had bought two at the same time. It is not loud at all. I actually put it in my room at night because I sleep so much better because of the gentle fan blowing. And as far as how it works the proof is in the filter. I can't believe how much dust/dirt it is removing from the air in my home. A wonderful buy!
Great for a small bedroom or den:
Agree with the other reviewers, the filter replacement cost is high. In my case it will average about $10/mon. I didn't expect this small unit to clean the air in our entire bedroom, which is very large with cathedral ceilings. It does an excellent job filtering the air in the lower portion of the room, where we sleep or sit. Purchased the unit in April '07. The first time the Pre-Filter light indicated it needed to be changed, I washed the filter lightly in cool, sudsy water, let it air dry and... more info
