Product review (1 stars): Filter changes quickly become cost prohibitive
As others have stated, the humidifier itself functions well, however, these filters are just plain awful. As has been mentioned by previous reviewers, the original filters lasted almost an entire winter season.  Every set I have purchased thereafter (from Amazon as well as two different brick and mortar retailers) has lasted 2 weeks before the wicking functionality substantially decreased rendering the unit incapable of effectively humidifying even a standard sized bedroom.  And this is even while using the Holmes humidifier water treatment religiously in every single tank (following the instructions to a "t").

The overall cost of ownership becomes prohibitive given the number of $20-25 filter changes I would need in a given year.

Extremely disappointed in these filters and the Holmes brand.