1Pack AP2503 Replacement Filter for KOIOS AP2503 Air Purifier, 3-in-1 H13 True HEPA and Activated Carbon Replacement Filter for Home Large Room, Pet Hair, Smoke, Dust, Pollen, AP2503, White

["Compatible with KOIOS AP2503: This genuine replacement filter is designed for the KOIOS AP2503 air purifier and works efficiently in spaces up to 2,500 sq. ft. It fits perfectly in spacious living rooms, open-concept homes, basements, and master bedrooms — helping deliver fresh air to every corner of your home.","Advanced 3-in-1 Filtration: Breathe easier with our premium 3-stage filter, designed for larger spaces. The washable pre-filter, H13 True HEPA filter, and high-efficiency activated carbon filter work together to capture small airborne particles — helping keep the air clean and fresh throughout the room.","Smart Replacement Alerts: Your KOIOS AP2503 HEPA air purifier has a built-in filter life indicator that lets you know exactly when to swap in a new filter — taking the guesswork out of home air purifier maintenance. The life of this H13 True HEPA filter can be extended when used with the washable pre-filter.","Easy Replacement: Your KOIOS AP2503 pet air purifier typically reminds you to replace the filter every 3–6 months. The replacement process is simple and straightforward — no tools required. Just open the unit, pop in the new AP2503 filter and pre-filter, and you’re done in seconds. Breathe easy.","For Pets & Odors: Designed for homes with pets, frequent cooking, or smoking. Whether you're using it in a main living area or a bedroom, this upgraded activated carbon filter is filled with dense carbon pellets to help absorb stubborn pet odors. The HEPA layer also helps capture pet dander, dust, and pollen."]