The initial filter aids in prolonging the lifespan of the HEPA filter by blocking hair, dust, and debris from entering.
Nispira 3-in-1 True HEPA filter with Activated carbon filter replacement compatible with Osimo A2 air purifier
4 filters included. Suggest replacing the HEPA filter every 4 months to optimize the performance and getting the best result. HEPA filter dimension: 4" x 4" x 1.2".
High quality HEPA filter capture 99.97% of airborne particles down to 0.3 microns.
Activated charcoal help deodorizing the unfavorable household smell from cigarette, cooking, pet etc.