Product review (1 stars): Wrong Size
I am so disappointed in this filter.  I searched by my humidifier model number and was taken by that process to this humidifier filter.  I ordered three to get through the season.  When I placed the filter in the humidifier this morning, it covers only 2/3rd of the needed space.

So warning to customer.  I recommended confirming size and cross check filter part numbers.  The software that matches filter with model number did not work for me.  Lesson learned.