Cherry Home 3 in 1 ionizer filter 

Filter change is best done After 6 months. Failure to change filter will lessen the effectivity of the Air Purifier.

This ionizer filter has 4-stage layer
1. HEPA filter - allergens, pollens, dust mites, tobacco smoke and pet dander.
2. Carbon Filter - TVOCs, toxic gas, formaldehyde, odor.
3. Cold Catalyst Filter - TVOCs, chemical and harmful gases.
4. Negative Ions - airbourne pollutants