Product review (5 stars): Excellent replacement for a lime/calcium crusted filter!
I purchased this to replace an old filter on my Hunter unit and was happy with the purchase price on the unit. I bought my humidifier used back in 2010 and was not sure how old it was. The filter was fairly clean when purchased. I used to be really good at keeping the unit cleaned out. By washing it out once a month. But got very lazy the last few years. My filter was eventually caked with so much hard water lime deposits and calcium that the filter looked disgusting and was actually starting to disintegrate! The line caking was so bad that a hole was caused into the side of the filter there the metal filter had eroded and collapsed and little pieces of the filter were snapping off with a touch.
While these filters say they are permanent and never need to be replaced, this is not the case, you will need to maintain it and clean it out every so often to avoid any nasty buildup. Since I failed to do that mine corroded and broke apart. This replacement looks excellent and I will make sure to maintain it and keep it lasting for a long time, or until the actual humidifier unit breaks!