• OPTIMIZED FOR 2400 SQ FT AIR PURIFIER LARGE ROOM：These genuine KOIOS filters fully maintain the high-efficiency purification of your K03 air purifier large room, supporting coverage up to 2400 sq.ft. They fit perfectly for your hepa air purifier in spacious living rooms, open-concept homes, basements and master bedrooms, delivering fresh air to every corner of your space.
• PERFECT FIT FOR KOIOS K03 & 3-IN-1 H13 HEPA FILTRATION: Exclusively designed for KOIOS K03 hepa air purifier, this 2-pack replacement filter delivers optimal performance for your air purifiers for home. The H13 True HEPA layer captures 99.97% of airborne particles as small as 0.3 microns, including dust, pollen, pet dander, ideal for air purifiers for home pets and daily family use.
• WASHABLE PRE-FILTER & UPGRADED ACTIVATED CARBON LAYER: The detachable white pre-filter is washable with water or cleanable by vacuum, trapping large particles like pet hair and lint to extend the lifespan of your hepa air purifiers for home. Our upgraded high-density activated carbon layer powerfully absorbs odors from smoke, pets and cooking, perfect for your air purifier for smoke and pet households.
• FILTER REPLACEMENT REMINDER & EASY RESET OPERATION: This replacement filter is fully compatible with the filter indicator of your KOIOS air purifiers for home, which will alert you when it’s time to change the filter. After replacement, simply press and hold the RESET button for 3 seconds to complete the reset. For optimal effect, we recommend replacing it every 6-8 months with official KOIOS genuine filters.
• PRESERVES 22dB ULTRA-QUIET SLEEP MODE FOR BEDROOM: Our genuine KOIOS replacement filters fully retain the ultra-quiet performance of your hepa air purifiers for home. The K03 air purifier runs as low as 22dB in sleep mode with our filter—quieter than a whisper, bringing no disturbance to your sleep. It’s ideal for air purifiers for home used in bedrooms and kids’ rooms.
• SUPPORTS CHILD/PET LOCK & FULL SMART FUNCTIONS: These official filters maintain all core functions of your K03 air purifiers for home pets. It supports the child & pet lock to avoid accidental touches by kids and furry friends, 4 adjustable manual fan speeds for customized purification, and the 2-in-1 air purifier & aroma diffuser function—add essential oils to enjoy fresh air and pleasant fragrance.
• GENUINE KOIOS FILTER & WIDE APPLICABILITY: We provide authentic KOIOS K03 replacement filters, exclusively customized for your hepa air purifier to ensure perfect fit and best purification effect. Made of safe premium materials, it’s suitable for all indoor scenes: home, office, dorm, apartment, guarding every breath of you and your family.
• AMAZON SUBSCRIPTION DISCOUNT & PROMPT CUSTOMER SUPPORT: Sign up for Amazon Subscription on this KOIOS K03 replacement filter to get an extra exclusive discount, saving you more on long-term filter replacements for your air purifier. If you have any questions about installation, compatibility, or product quality, contact our customer service anytime—we will reply to you within 1 business day to solve your problems efficiently.

KOIOS Genuine K03 Air Purifier Replacement Filter