Filtretre Allergen Defense 1000/1085 MPR Furnace Filter, 20" x 25" x 1" is designed to enhance the air quality in your home by capturing a broad spectrum of particles and allergens. This filter works seamlessly with central heating and cooling systems, ing your HVAC system into a whole-home air purifier. It effectively traps particles of various sizes, from larger ones like lint, pollen, dust, and pet dander to smaller particles such as smoke and smog. With a Microparticle Performance Rating of 1000/1085, this filter efficiently captures common airborne allergens and pollutants, helping to reduce allergens and promote cleaner, healthier air for you and your family. Regularly replacing your HVAC filters with Filtrete Allergen Defense filters ensures consistently improved air quality throughout your home. Model Number: 9803-4