I bought two of these, they are definitely a great product and last about as long as the Aprilaire 35 but they are no better. My humidifier has been on throughout the unseasonably cold winter and I use two to three water panels per season. I recently removed the BestAir panel after two months of use. In good condition, no mold, smell or other problems. After replacing it with an Aprilaire 35, the humidity measured by the Apriaire control unit increased by a few percent. That was either because the BestAir wore out over two months, or maybe the Aprilaire is a bit more efficient, it's hard to say which. I also found their "up to 50% less water" claim to be a bit optimistic since the amount of water coming out of the humidifier is exactly the same as the Aprilaire. I like the idea of paper as a consumable. like that, but if it was a better idea I would expect Aprilaire to offer that option. I posted this review, the price is actually pennies less than buying two of these BestAir panels. If BestAir panels cost significantly less, they would certainly be preferable to Aprilaire panels.
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