HQRP Humidifying Wick Filter compatible with Sharp KC850U KC860U KC-C70U KC-C100U KC-C150U; FZ-C100MFU Replacement

The filter is good for up to 2 Years (under normal usage in residential conditions). Humidifying filter needs to be washed or replaced when the Filter Change monitor light goes on.

Frequency of maintenance cycle will depend on the hardness or the impurities of the water that you use; the harder the water the more often descaling will be necessary.
Filter life can be greatly reduced depending on the room environment. Even if 2 years have not passed, replace the Humidifying Filter if you notice the following:
1. Mineral deposits (white, black, or red masses) which are not removed after cleaning or the Humidifying Filter is still dirty.
2. Filter is severely damaged or warped.