Xiaomi Smart Air Purifier 4 Pro Filter

The Xiaomi Smart Air Purifier 4 Pro Filter is a high-performance replacement filter specifically made for the Xiaomi Smart Air Purifier 4 Pro unit, built to ensure cleaner air with durable construction.

It consists of three purification layers:

1. A primary filter captures larger particles such as dust, pet hair, and fibers—helping to protect the inner filter layers and extend lifespan.

2. Xiaomi’s “High Efficiency Filter,” combining mechanical filtration with electrostatic enhancement, capable of removing 99.97% of particles sized 0.3 micrometers.

3. A high-quality activated carbon layer containing about 650,000 mg of carbon pellets, designed to absorb odors, VOCs (volatile organic compounds), cooking smells, and pet odors.

The filter has a cylindrical design with an outer diameter of about 226 mm and a height of 360 mm, fitting exactly into the purifier unit. Its color is typically grey/black, and it’s suggested to be replaced every 6-12 months, depending on usage and ambient air quality.

Key Features:

• High filtration efficiency removing 99.97% of particles ≥ 0.3 µm. 

• Triple-layer design: primary mesh, high-efficiency filter, and activated carbon for full spectrum purification. 

• Large content of activated charcoal (~ 650,000 mg) for odor and pollutant removal. 

• Very large filter surface area (~ 24,000 cm²) for better airflow and lower resistance. 

• Dimensions: around Φ226 mm outer diameter, 360 mm height—perfect fit for the matching air purifier.

• Replace every 6-12 months depending on air quality and usage.