Do it Efficiency Rated Allergen Plus Furnace Filter, 24 x 24 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 is designed to remove microscopic particles that can stain walls and furnishings and trigger seasonal allergies. It effectively protects 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 while still providing reliable protection for your furnace and air conditioning units. With a lifespan of up to 90 days, this blue label filter is a practical choice for maintaining cleaner air in your home. Model Number: 448046