Product review (3 stars): Works well but does not last long
This filter works well when new, but only lasts about 3 to 4 weeks before needing to be changed.  If you run your humidifier all winter as I do, make sure you stock up and get several for the season.  Puts just as much moisture in the air as the OEM filter and costs about 1/2.  OEM filters do last a week or two longer, but for the price, it's worth it.