Filtretre Allergen Defense 1000/1085 MPR Furnace Filter, 14 in. x 25 in. x 1 in. is designed to improve the air quality in your home by capturing a wide range of particles and allergens. It is specifically engineered to work with central heating and cooling systems, effectively turning your system into a whole-home air filtration operation. The filter captures particles of varying sizes, from larger particles like lint, pollen, dust, and pet dander, to smaller particles such as smoke and smog. This helps reduce allergens and enhances the overall air quality in your home. With a Microparticle Performance Rating of 1000/1085, this Filtrete Allergen Defense Air Filter effectively traps common airborne allergens and pollutants, providing cleaner, healthier air for you and your family. Regularly replacing the filters in your HVAC system with Filtrete Allergen Defense filters ensures cleaner air throughout your home. Model Number: 9804-4