Product review (5 stars): Works for Bionaire humidifier BCM3855C
I have a Bionaire whole house humidifier (model # BCM3855C). The label on the unit states the replacement filter # as HWF75/SF221. I couldn't find it on the Bionaire website, so I looked here. Reviews stated that this filter would fit and, indeed, it does. Since it fits and does what it needs to do, I am more than satisfied.