Xiaomi Filter for Smart Air Purifier 4 Black

A primary filter, Xiaomi's High Efficiency Filter and a high-quality activated carbon filter work together to purify your air and keep you healthy.

• The 500000mg high-quality activated carbon, with the sophisticated pore structure and evenly distributed carbon, effectively removes air pollutants and odour that are harmful in your home.
• Combining 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.
• The HEPA filter is made of dense fibreglass to trap particles, which means that less clean air gets through the filter.
• Xiaomi's filter uses melt-blown PP fibres with electrostatic technology. With greater space between fibres, larger volumes of air are able to pass through the filter.
• Large volumes of air are forced through the dense HEPA filter, meaning a higher fan speed is required, which generates more noise.
• With a lower fibre density, the filter allows air to pass through at high speeds, resulting in less noise.
• In order for the HEPA filter to release more clean air, the motor must run at a higher speed, which translates into a higher energy consumption.
• You can check filter usage at any time via the Mi Home/Xiaomi Home app. The app even estimates filter replacement times based on your usage.
  With a lower fibre density, Xiaomi's filter is able to release the same volume of clean air as a conventional filter, but with a much lower energy consumption.