Replacement filter compatible with Philips humidifiers HU4801, HU4802, HU4803, HU4810, HU4811, and HU4813. Your humidifier creates a better and healthier climate in your home. The NanoCloud evaporation technology draws in dry air, adds water molecules to it, and releases humidified air into the room. The humidification filter captures bacteria, calcium, and other particles from the water, ensuring hygienic humidification. To ensure optimal performance of the humidifier, it is important to replace the filter at regular intervals. The Philips FY2401 is an improved filter with a lifespan of six months, which is twice as long as that of the previous generation filter. Clean the humidification filter weekly to keep it in a hygienic condition. For optimal performance, the filter should be replaced every six months, but if it is in good condition, it can be used longer. However, be sure to replace the filter at least once a year. Replacement filter suitable for Philips humidifiers HU4810, HU4813, etc. Replace filters regularly for optimal performance. 1 piece included in the package.