Product review (3 stars): Not the same as in the past
I have been using these humidifiers for quite a number of years now.  For health reasons I use my humidifier year round to maintain humidity levels in my home.  I bought the last replacement filters available at my local Lowes a few months ago and it fit and performed beautifully. The filters available from Amazon are shorter around as well as in height and do not fit snugly into the ring.  They are also not as sturdy as they have been in the past and don't last as long before out-put begins to slow down.  They also now contain a warning from the state of California for health concerns. Unfortunately Amazon is the only place I can find the actual Aircare replacement filters which perform better than the generic brands.