Product review (3 stars): seem to work OK so far
These replacement filters seem to work well - the humidity is back up now that I have a freshly absorptive filter in my humidifier. I am slightly put off by the fact that the box says to replace these filters every six weeks - over the course of a long winter, that could get expensive! Note: I used the original filter that came with the machine last year for one whole season and it seemed to do the job... I will try to stretch this one out for a whole season too.