The Holmes HAP9422-UA air purifier accepts the following replacement filters:
The Holmes HAP9422-UA HEPA Air Purifier offers premium air filtration to improve your overall indoor air quality. This Holmes air purifier reduces up to 99% of airborne particles down to 0.2 microns in size and is ideal for medium-sized rooms up to 170 square feet in size. This HEPA air purifier also eliminates many unpleasant odors through the use of Arm & Hammer baking soda. Offering three speed settings and convenient quiet operation, this Holmes HEPA air purifier also includes an optional ionizer for an extra boost of clean air.
Holmes HAP9422-UA HEPA Air Purifier specifications: