HEPA and activated carbon filters. Integrated HEPA and activated carbon filters remove harmful particles, allergens, bacteria, and viruses. Hassle-free filter maintenance thanks to the all-in-one design. They filter fine dust, toluene, and formaldehyde. The filter absorbs formaldehyde, TVOC, and odors, trapping everything in its nanometer-sized pores. Dimensions (W x H x D): 28.8 x 28.6 x 22.8 cm. Three filters in one for comfort and outstanding performance. The cylindrical 3-in-1 filter contains three filter layers to ensure your device consistently delivers high performance. The optimal combination of activated carbon, HEPA, and pre-filter removes pollutants, viruses, allergens, and bacteria from the air. We recommend replacing all three filters simultaneously for cleaner air to breathe. Superior performance. The 3-layer filtration with NanoProtect HEPA, activated carbon, and pre-filter protects you from bacteria, pollen, dust, fine particulate matter smaller than 2.5 µm, pet dander, and gases. The NanoProtect HEPA technology not only captures pollutants but also attracts them through a special electrostatic charge. This allows the air to be cleaned even faster than with a medical-grade HEPA H13 filter. Filter status indicator. Your device will inform you when the pre-filter needs cleaning and when the filter needs to be replaced. This takes less than a minute. The effortless maintenance of the device ensures that you can always breathe clean, healthy air.