Product review (2 stars): which makes it useless in the humidifier
These filters are 1) too short and 2) do not hold moisture at all. When the humidifier was running continuously overnight, the filter started turning brown on the upper edges and I was scared that it would burn up without moisture. Basically, the filter is unable to absorb, or retain water, which makes it useless in the humidifier, which otherwise works perfectly well.