Germ Guardian FLT9200 True HEPA GENUINE Replacement Filter H is a multiple level cleaning system that includes a True HEPA filter, activated carbon filter and pre-filter screen that all help to improve indoor air quality. The True HEPA Filter captures 99.97% of dust and allergens as small as 0.1 microns such as household dust, pet dander, mold spores and plant pollens. The activated granular carbon filter reduces odors from pets, smoking, cooking along with harmful VOC's emitted from a variety of household products and chemicals. Finally, the pre-filter screen captures large dust particles and pet hair, extending filter life. It is recommended to use with the GermGuardian AC9200WCA. This is a GENUINE GermGuardian Filter. It is important to only use genuine Guardian Technologies replacement parts to maintain product performance and warranty. All parts that are not genuine will void the warranty. Only one single combination filter needs to be replaced every 6-8 months depending on the use of the product. GermGuardian True HEPA Air Purifier Filter | FLT9200