Mi Air purifier 4 PRO Filter

All-in-one powerful filter Clean air outputs after layers of purificationA primary filter, Xiaomi's High Efficiency Filter and a high-quality activated carbon filter work together to purify your air and keep you healthy.High-quality activated carbonXiaomi's High Efficiency FilterPrimary filterPrimary Filter 360° large particles blockingThe primary filter provides an initial filtration by filtering dust, hair, fine crumbs among other large particles and is resistant to creases, oil, acids, alkalis and more to ensure a long service life.Dustfine crumbsPet haircotton fibersXiaomi's High Efficiency Filter 99.97% filtration of 0.3μm particles*The 24000cm² high-efficiency filter* removes PM2.5, pollen etc. to output consistent clean air.0.1μm0.3μmPM2.5PollenPet danderHigh-quality activated carbonThe 650000mg high-quality activated carbon*, with the sophisticated porous structure and evenly distributed carbon, effectively removes air pollutants and odour that are harmful in your home.Pet odoursCigarette smellVOCCooking fumesOther odoursThe difference between Xiaomi's High Efficiency Filter and conventional HEPA FilterCombining two filter technologies: Electrostatic charge and mechanical filtration, Xiaomi's High Efficiency Filter media can remove 99.97% of airborne particles of 0.3 micrometers in size and traps dust, PM 2.5, pollen, pet dander, smoke and tiny particles. Compared to a conventional HEPA filter, Xiaomi's High Efficiency Filter allows the air purifier to generate less noise and consume less energy by allowing more airflow to pass through the filter all the while keeping the same cleaning efficiency.Conventional HEPA filterXiaomi's High Efficiency FilterLess clean airMore clean airHEPA filter is made of dense fiberglass to trap particles, which means that less clean air get through the filter.Xiaomi's filter integrated melt-blown PP fibers with electrostatics technology equipped with bigger fibers space, which enables a large volume clean air to get through the filter.NoisyLow noiseLarge volume air is forced to get through a dense HEPA filter, requires higher fan speed, which will generate higher noise.Less dense fibers filter is easy to have the air passed even in a high speed, which results in much lower noise.Higher energy consumptionLower energy consumptionIn order to get more clean air, HEPA filter requires the motor to run at a higher speed, which causes higher energy consumption.Thanks to a less dense fibers filter, Xiaomi's filter consumes less energy to achieve the same volume clean air.*The filter media performance is tested by China Testing & Inspection Institute for Household Electric Appliances (Report Number: WCv-21-40115). Due to the technical specifications of the filter media, the test environment and parameters may differ.Just one filter for up to one year's usage Everyday freshness with a long-lasting filterAlthough the all-in-one filter is durable, the performance may gradually degrade over time. It is recommended to replace the filter every 6–12 months.Mi Home/Xiaomi Home app connectivity Filter replacement reminders on smart devicesYou can view the filter usage at any time on the Mi Home/Xiaomi Home app which estimates the filter replacement time based on your use.