Do it Efficiency Rated Allergen Plus Furnace Filter, 15 x 20 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 effectively protects against ragweed pollen, mold spores, dust mite debris, pet dander, and dust/lint. With low airflow resistance, it helps save on energy costs while ensuring your furnace and air conditioning units are well protected. This filter lasts up to 90 days and features a distinctive blue label. Model Number: 448036