Formaldehyde S1 filter for the Mi air purifier
This formaldehyde filter features a cylindrical, aerodynamic design, providing 360-degree filtration with an effective triple filter consisting of a base filter mesh layer, a high-efficiency E11 filter, and an activated carbon filter. The Mi air purifiers are effective due to their high quality, as well as their ease of use and replacement. This filter is compatible with the Xiaomi Air Purifier 2/2S/2H/3H/Pro.
Filters even the smallest particles
Filters even the smallest particles
- Dust and condensed smoke
- Human and animal hair
- Paper, wood, and other fine particles
- Plant fibers, such as pollen and cotton
- PM2.5 particles
- Compatible with Xiaomi Mi Air Purifier 2 / 2S / 2H / 3H / Pro

Economical HEPA filter
The HEPA (High-efficiency Particulate Arrestance) filter is often used in hospitals and laboratories to filter micron-sized particles. The Mi air purifier uses an ultra-thick Toray PP and PET HEPA filter to capture PM2.5, PM0.3, pollen, and other inhaled particles, ensuring that only clean air flows through. The filter measures 7.7 m when fully developed and effectively filters out 99% of PM0.3 particles and 99.99% of PM2.5 particles.

Cleaning with activated carbon
Activated carbon absorbs harmful gases that the HEPA cannot filter. The coconut-based activated carbon found in Mi air purifier filters is among the most effective of its kind. This is combined with a formaldehyde-fighting formula that effectively absorbs harmful chemicals such as formaldehyde, benzene, and ammonia, as well as odors and smoke.

Real-time monitoring
Every filter loses efficiency over time and needs to be replaced eventually. Filters that are not replaced in time cannot eliminate harmful substances or may cause secondary pollution. Cleaning old filters with water or a vacuum does not guarantee that the filter will regain its efficiency. Depending on usage, it is recommended to replace the filters every six months at most. With the Mi Home app, you can track the lifespan of the filters and receive reminders for replacement.