The Xiaomi Mi Air Purifier Formaldehyde Filter S1 is designed to improve indoor air quality by effectively removing harmful substances. It has a three-layer filtration system starting with a primary layer that captures large particles such as dust, hair, and lint, protecting the inner layers and extending filter life. The next layer is an ultra-dense H11-grade HEPA filter made from Toray PP and PET materials that traps 99.3% of PM0.3 particles and 99.99% of PM2.5 particles including pollen, smoke, and pet dander. The final layer is an activated carbon filter made from high-quality coconut-based activated carbon combined with an anti-formaldehyde formula to adsorb harmful gases like formaldehyde, benzene, ammonia, and other volatile organic compounds (VOCs), as well as odors and smoke. The cylindrical design ensures 360-degree air intake for optimal purification efficiency. It is compatible with Xiaomi Mi Air Purifier models 2, 2S, 2H, Pro, 3, 3H, and 3C. The recommended replacement interval is every 3 to 6 months depending on usage and air quality. The filter has an RFID chip for real-time status monitoring through the Mi Home app, providing timely replacement reminders.
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