- Ensure optimal air quality with the H13 Replacement Filter compatible with GL-K803 Air Purifier. This high-efficiency H13 HEPA filter effectively removes 99.7% of airborne particles as small as 0.3 microns, providing a cleaner and healthier environment for you and your family. - The 3-stage filtration system, including a high-efficiency activated carbon layer, effectively eliminates odors and smoke, making it ideal for homes with pets, cooking smells, or smoke exposure. - To maintain peak performance, remember to reset your air purifier after filter replacement by pressing the timer button for 5 seconds. Regular filter changes are essential; we recommend replacing the filter every 6 months. However, usage time may vary based on your surrounding air quality. - Perfect for use in bedrooms, living rooms, and offices, this filter enhances air purity, ensuring a refreshing atmosphere whether you are relaxing, working, or sleeping. - Made with premium materials, this filter is designed for durability and efficiency, making it a reliable choice for your air purification needs.