- Compatible with select models: AC4825, AC4825E, AC4300, AC4800, AC4900, AC4850, AP2200CA, and Black+Decker BXAP148. Note: This is a non-original manufacturer product designed for perfect compatibility with these models. - Breathe easier with the FLT4825 Replacement Filter, featuring H13 true HEPA technology. This filter captures airborne particles as small as 0.3 microns and combines a high-efficiency activated carbon layer to eliminate unpleasant odors and wildfire gases. Ideal for enhancing your indoor air quality, this filter is essential for reducing symptoms related to poor air. - Each package contains 4 H13 True HEPA Filters and 10 Activated Carbon Filters. Maintaining high air quality is vital for health and well-being. For optimal performance, replace the HEPA filter every 6-8 months and the pre-filter every 2-3 months. - The filter replacement process is simple and tool-free. Remove the old filter, insert the new one, and reset the machine by pressing the UV button for 5 seconds until the red light stops flashing, confirming a successful reset. - Use scenarios include homes, offices, or any indoor space where air quality is a concern. Whether tackling seasonal allergies, reducing pet odors, or ensuring a fresh environment during wildfire season, this filter delivers effective performance.