Do it Efficiency Rated Allergen Plus Furnace Filter, 14 x 30 x 1 in. superior air filtration with its MERV 8 efficiency rating, making it 15 times more effective than standard fiberglass filters. This high-performance HVAC air filter captures microscopic particles that can cause stains on walls and furnishings, as well as aggravate seasonal allergies. It effectively protects against ragweed pollen, mold spores, dust mite debris, pet dander, and dust/lint, ensuring cleaner indoor air. Designed with low airflow resistance, it helps save on energy costs while providing essential protection for your furnace and air conditioning units. This filter lasts up to 90 days and features a distinctive blue label for easy identification. Model Number: 448028