Hunter 30973 Replacement Filter Hepa filtration traps 99.9-percent of allergens electrical filter tips kill living biological pollutants Electric filter tips kill living biological pollutants like bacteria and viruses Lasts 6 to 12-month in normal use Easy to replace Patent pending genuine oem part Fits models: 30405, 30406, 30407, 30413, 30414, 30441, 30890, 30891, 30892, 30895