Product review (1 stars): Doesn't work!  Try something else.
i've been using this with my Honeywell humidifier for the last 10 days.  I really like the idea of a reusable filter but it just doesn't work.  I went from filling my humidifier twice a day to once every 2 days and my humidity is down to 10%.  Tried cleaning it with vinegar -- no improvement.