Replacement Anti-limescale filter for LB37 Air humidifier With regular use, the anti-limescale filter should be replaced after approx. 2 – 3 months, depending on how hard the water used is. When the filter and the device are not in use, the water must be drained from the device and the tank. The filter should be allowed to air dry before it is stored (do not enclose with the device when wet). After that, the filter can be reinstalled and used in the device as with the previous use.
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