4-in-1 Replacement filter compatible with Morpilot Keenstone air purifier. Compare to the original part APF-1 Combination of mesh pre filter, H13 True HEPA, Cold catalyst and activated charcoal Filter in one Mesh pre filter helps trap the big and visible particle such as hair and dust. HEPA filter removes up to 99.97 percent of airborne particles as small as 0.3 microns. Activated charcoal filter deodorizes unfavorable household smell and VOCs. Cold catalyst removes harmful toxic household chemicals (formaldehyde, ammonia, benzene, and hydrogen sulfide) 2 filters included. Suggest to replace the filter every 6 months the most to optimize the performance and achieve the best result.
