Filtretre Allergen Healthy Living 1550 MPR Furnace Filter, 20" x 25" x 1" is designed to deliver high-performance filtration for your HVAC system. Featuring a Microparticle Performance Rating (MPR) of 1550, this filter effectively captures a wide range of particles such as dust, bacteria, viruses, and allergens, helping to improve the air quality in your home. By proactively removing these contaminants, it creates a cleaner and healthier living environment for you and your family. I for those who prioritize air quality, this furnace filter ensures optimal performance when replaced regularly according to the manufacturer's guidelines, providing continuous improvement in your home's air freshness. Model Number: 2003-4-HR