FilterBuy Honeywell Air Cleaner Replacement Filter for 13350, 13500, 13501, 13502, 13503, 13520, 13523, 13525, 13526, 13528, 50250, 50251, 52500, 63500, 83162, 83259, 83287, 83332 by AFB Hepa Replacement for Honeywell 24000/24500 manufactured by FilterBuy Designed to fit Honeywell enviracaire models: 13350, 13501, 13502, 13503 (EV-35B), 13520, 13523, 13525, 13526, 13528, 13350, 50250, 50251, etc. Also fits fit Kenmore models: 437.83259 and 83259 Premium aftermarket replacement HEPA filter manufactured by FilterBuy and it is designed to remove 99.97% particles Replace every 12 months