Product review (4 stars): These filters are kind of fragile and the filter housing in the Idyllis humidifier could have been better designed to protect th
These are the 2nd set of filters I've gotten since buying the new whole house humidifier in November. I'll have to wait and see
how these filters hold up.  2 of the first set of 4 (a papery material) pulled apart and would no longer stay upright in the filter
housing. These filters are kind of fragile and the filter housing in the Idyllis humidifier could have been better designed to protect them.
All that said though, the humidifier, which I keep in my upstairs bedroom works fine, and helps significantly with the dry winter air
in the house. The gas heat furnace in my condo really  'cooks' the humidity from the air, so the humidifier with these filters, even though
forced hot air vents are not a perfect system, is the best option I have found.