Filtretre Allergen, Bacteria, and Virus 1550 MPR Furnace Filter, 20" x 25" x 4" is designed to deliver high-performance filtration for your HVAC system. This deep pleat furnace filter effectively captures large airborne allergens such as pollen, mold spores, and dust mite debris with a 97% capture rate. It also targets microscopic particles like dust, smoke, and smog, thanks to its electrostatically charged fibers that enhance particle retention. The deep pleat construction increases the surface area, promoting better airflow and filtration efficiency. With proper care, this filter can last up to 12 months, helping to significantly improve indoor air quality by reducing allergens, dust, smoke, and other airborne particles. Model Number: NDP03-4IN-4