Product review (3 stars): Needs a longer service life!
These filters are the required Form, Fit, and Function replacement for the humidifiers I have. From that standpoint they are fantastic. However, they only last about 2 weeks before the performance of the humidifier is degraded. I then have to turn the filter over to squeeze out another week (or 2 if I'm lucky). Needless to say at $12-$18 per filter this adds up over the course of the winter.