Product review (5 stars): Crucial Air HC-14 filters for Honeywell Humidifiers
I have been buying these filters for a couple of years, simply because they are less expensive than the Honeywell brand.  Both work equally well in my 6009 series humidifier by Honeywell.  The unit itself is excellent.  I live in Arizona, where the humidity levels are often in the single digits, and I run my humidifier for several hours each morning to maintain a comfortable level.  I have a large home library and don't want my book bindings drying out, or the wood furniture in my home.  I rinse off the filters in the shower when I clean the inside of the unit and they work just fine.  My recommendation for use of either filter type is to drain the unit when not in use for a long period.  I have no bad odors (as stated in another review) and truly see no difference in quality or performance, and the cost savings is significant.  I do absolutely recommend these filters.