Product review (2 stars): Need Replacement Very Frequently
My humidifier needs 2 of these filters and they need to be replaced very frequently (pretty much weekly) and they are awkward to replace.  With my model humidifier you have to remove the water base and you end up with water all over the floor.  Not sure if it's the filters as much as the humidifer but I find the whole system more cumbersome than need be.