Replacement Filter Kit for Air Response MediumReplacement Filter Kit for Air Response Medium (WK16001) Type: B2 Includes: (1) HEPA Media and (2) Odor Control Filters to provide up to 12 months of protection* HEPA Media filter captures 99% of particles down to 0. 3 microns** such as dust, pollen, pet dander, and cooking smoke. Activated Carbon Filter removes unwanted odors. Compatible with the Oreck Air Response Medium Model #: WK16001 Only Oreck Certified Filters should be used with Oreck air