EcoSilver® Replacement Air Purifier Pre-Filter 2-Pack H-PF670

Silver nanoparticles in the EcoSilver® pre-filter prevent the growth of microorganism on the filter, including bacteria and viruses True HEPA filtration removes up to 99.9% of airborne particles as small as 0.3 microns in size including smoke, dust, pollen, pet hair and dander, mold spores and dust mites Recommended to replace every 3 months for maximum efficiency, or more often depending on air quality & environmental factors Package contains 2 replacement pre-filters Approximate Dimensions: 23.5 x 10.07 x 0.1 inches Fits Model Part Number HP670 H-PF670 HP670WH H-PF670 HP670BL H-PF670 HP670GR H-PF670