The Winix 112180 Replacement Filter N is a complete 1-year filter. The True HEPA Filter captures 99.97% of particles and impurities as small as 0.3 microns， including pollen， mold， dust， pet dander and hair， other allergens and cigarette smoke. The Coated Deodorization (CD) Carbon Filter uses an activated coating to reduce large amounts of odor in the environment， extending the life of the True HEPA filter. The genuine Winix Filter N is compatible with Winix Air Purifier units NK100 and NK105.

Pre filter: fine mesh pre filter to capture large particles such as hair， carpet fibers and dust adding life to other filters

Coated deodorization (CD) carbon filter: Produced to capture offensive smoke， cooking and all other household odors

True HEPA filter: Captures 99.97% of airborne pollutants， pet dander and allergens as small as 0.3 microns

All-in-one 360° filter

Replacement filter for NK100 and NK105

Change at least once every 12 months