Only the use of the official Levoit Core 400S-RF replacement filter can maintain the performance of your air purifier.

The filter consists of a pre-filter, H13 HEPA filter, and activated carbon filter. It removes 99.97% of dust, pollen, smoke, odors, and pet hair. It filters particles as small as 0.3 micrometers and also filters air pollution from PM 2.5. Ideal for allergy sufferers, asthmatics, pet owners, smokers, and children.

The filters are sealed to protect their lifespan. Please remove the plastic bag from the filter before running the air purifier. Otherwise, the device may be damaged. It is recommended to replace the air filters every 12 months.