Product review (4 stars): Low cost humidifer Filter
Have been using the replacement filter for my Holmes Humidifier
for over a month, now.  Most of the time you get what you pay for!
This is a very low-cost filter but it is doing a good job.
My humidifier is operating very well and the filter check is in the
good zone after about half an hour. I recommend it for its low-cost
and performance.