45i Replacement Filter Fit for Alen BreatheSmart Flex 45i Air Purifier,3-in-1 Grade Fresh Filter, B4-Pure,2 H13 True HEPA Filter with 6 Carbon Pre-Filters

["Compatible Models：This 45i replacement filter fit for Alen BreatheSmart 45i and Flex air purifiers, corresponding to Part # B4-Pure (replaces old # FL40).","3-In-1 Advanced Filtration：The filter fit for alen air purifier filter replacement features a comprehensive 3-stage system: ① fine nylon pre-filter for large particles; ② H13 Grade True HAPE filter that captures 99.97% of airborne particles as small as 0.3 microns; ③ activated carbon layer for neutralizing odors, VOCs, and gases.","Superior Performance：Effectively tackles dust, pet dander, lint, smoke, etc. The enhanced carbon formulation is particularly effective against persistent household odors from pets, cooking, and wildfires, ensuring fresher indoor air.","Value Pack：The package includes 2 complete 3-in-1 HAPE filters and 6 extra activated carbon pre-filters. For optimal performance, replace the main filter every 9-12 months and the pre-filter every 3 months. Simple, tool-free installation.","Smart Reset：After installing the new filter, press and hold the \"FILTER\" reset button on your purifier for 5 seconds until the indicator light turns green. Backed by responsive customer service for any installation or usage inquiries."]