The set includes:
1. Primary filter
Can filter out hair and larger dust particles.
It is recommended to clean it every 1-3 months.
2. Electrostatic filter
Filters out particles larger than 10 microns and cigarette tar.
It is recommended to replace it every 2-4 months.
3. High-efficiency filter
Filters out tiny suspended particles, allergens, pollen, bacteria, viruses, and mold.
It is recommended to replace it once every 6-12 months.
4. Oxygen-degrading reaction layer
Removes odors, decomposes, and eliminates harmful substances (such as formaldehyde and volatile organic compounds).
It can be used for a long time under normal maintenance .



