Usage Tips:3x Replacement Humidifier Filters For Philips Humidifiers Hu4801 / Hu4802 / Hu4803 / Hu4811 / Hu48133x humidifier filters / air filters for Philips humidifiers - tailor-made air filter for your Philips humidifier - absolute fit, fits perfectly into your humidifier model - Prevents the growth and migration of mold, fungi, algae and bacteria - Material: natural fibers with honeycomb structure - Thickness: 30mm The replacement filter ensures optimal air humidification and perfect hygiene and thus a more pleasant, healthy indoor climate. A Clean filter binds pollutants such as bacteria and limescale from the water and prevents mold and spores from spreading in the room air. The filter consists of natural fibers with a honeycomb structure, which ensures increased water absorption and therefore higher evaporation efficiency. Our tip: To ensure that your humidifier continues to function efficiently and hygienically, the filter should be cleaned regularly and - depending on use - replaced approximately every 3-6 months. Replaces: HU4102 HU4102/01 8815002 ACA-3E Suitable for the following device models: Compatible with Philips 2000 series HU4801 HU4801/01 HU4802 HU4803 HU4803/01 HU4811 HU4811/10 HU4813 HU4813/10 HU4814 HU4814/10 Also suitable for Enviracaire devices , Honeywell, Relion, Sunbeam, Vicks and similar devices.