Product review (1 stars): Useless waste of $$$$
Got this filter because we had white dust everywhere. Didnt really want to spend $30 a month on distilled water. After adding the filter, the dust continued. I didn't really want to breathe in this dust every night with sinus problems. I then bought distilled water because I was having sinus surgery and needed the moisture at nite. After 2 days of distilled water, the dust was eliminated. I honestly don't believe the filter works.