Do it Efficiency Rated Allergen Plus Furnace Filter, 20 x 25 x 1 in. superior air filtration with a MERV 8 efficiency rating, making it 15 times more effective than standard fiberglass filters. This furnace filter is designed to remove microscopic particles that can stain walls and furnishings while helping to alleviate seasonal allergies. It provides protection against common allergens such as ragweed pollen, mold spores, dust mite debris, pet dander, and dust/lint. The filter features low airflow resistance, which helps save on energy costs without compromising the protection of your furnace and air conditioning units. Built to last up to 90 days, this filter is an excellent choice for maintaining cleaner air in your home. Model Number: 474304