Product review (5 stars): So much better than the knock off!
I've owned the Honeywell HCM-6009 humidifier for a couple years.  The original filter made it through the frist two seasons, but was unusable after that.  At the beginning of this season, I bought a cheeper replacement filter from BestAir.  It cost less than half of what the OEM filter would cost.  What a mistake that was!  It was crusty and ineffective within a couple days!  I've tried all kinds of things to get it to work, but nothing has been effective.  I finally purchased this OEM filter, and I'm just amazed at the difference.  Based on how quickly the tanks drain, this filter is putting at least 5 times as much water into the air!  Seriously, it's an amazing difference.  I will never buy the BestAir knockoff again!