Do it Efficiency Rated Allergen Plus Furnace Filter, 25 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 HVAC air filter effectively removes microscopic particles that can cause staining on 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 or lint. Designed with low airflow resistance, this filter helps reduce energy costs while maintaining optimal protection for your furnace and air conditioning units. Each filter lasts up to 90 days and features a distinctive blue label for easy identification. Model Number: 448052