Product review (1 stars): Honeywell must have re-engineered this filter to fail quickly so they can sell more.
This filter lasted almost a month, pathetic. The original filter and the first replacement I bought for my humidifier (HCM-6009) had a blue fabric cover that allowed me to wash out the filter every week for several months before it needed to be replaced. I washed this one twice and the second time it just fell apart.