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.
GENUINE Replacement filter for GermGuardian Air Purifier Models AC4300BPTCA, AC4900CA, AC4825, AC4850PT, PureGuardian Model AP2200CA and Black+Decker BXAP148
Multiple levels of cleaning include HEPA, Pre-Filter and a Charcoal layer to help improve indoor air quality
True HEPA Filter captures 99.97% of dust and allergens as small as .3 microns such as household dust, pet dander, mold spores and plant pollens..Charcoal filter reduces common odors from pets, smoking and cooking.