Do it Efficiency Rated Allergen Plus Furnace Filter, 14 x 20 x 1 in. superior air filtration for your HVAC system, rated at MERV 8 for high efficiency. This filter is 15 times more effective than standard fiberglass filters, capturing microscopic particles that can stain walls, furnishings, and worsen 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, it helps save on energy costs while maintaining optimal protection for your furnace and air conditioning units. The filter is durable and lasts up to 90 days, featuring a distinctive blue label for easy identification. Model Number: 424536