Product review (5 stars): Easy to change last at least 6 months before needing replacing
I have the Ivation humidifier and it has been amazing so far, the only maintenance the humidifier seems to need is water refills and about every 6 months it requires a filter change. I ordered this replacement filter because I knew it was getting close to time for me to change and I wanted to have it on hand. The filter is a white tube that fits into the bottom of the humidifier and helps to filter bacteria, algae and mold  from the water so that it doesnt cycle into the air.
I found the filter easy to replace and total it took about 2 minutes to remove the old one and install the new. The filter gives me peace of mind that any impurities in the water will not go into the air for us to breathe in. The filter works for cool or warm water temperatures and regular maintenance of the humidifier helps to increase the life span. I have been very pleased with this filter replacement, I can noticeably tell it keeps the water cleaner and fresher much longer. The filter is excellently made and I would definitely say it is a have to have for anyone who owns the humidifier.
* I received this filter as a free sample in exchange for my honest and unbiased review.