Product review (1 stars): This Filter Doesn't Work for more than 7-10 Days
I have been using the Duracraft Evaporative Humidifier for many years.  It works well with a good AC-809 filter.  However the replacement filters which purport to be Duracraft AC-809 filters which I received from Filters-NOW.com are basically worthless.  They seem to work for about one week and then they stop working:  That is they no longer wick the water up for it to evaporate.  At first the water evaporates completely from the tank reservoir overnight.  But after a week less and less of the water evaporates and the filter remains dry at the top.  With the original Duracraft AC-809 Filters I found that they would work for about 5 or 6 months before needing replacement.  I will definitely look elsewhere to find a suitable replacement filter once my supply of four of these filters is gone.