Product review (4 stars): Humidifier Replacement Filter
These filters have worked as well as the originals. I have been using one for about a month and it is still doing fine. Following a comment in an earlier review, I have also started adding a humidifier water conditioner and a bacteriostat from Walmart each time I add water. When I was using the original filters the filter would start to loose its ability to wick up water after about three weeks and need to be replaced. Its probably the conditioner more then the type of filter, but this one is lasting longer. I have a wood stove which dries out the air so my humidifier runs almost constantly during the winter.