The AprilAire 213 Replacement Filter is designed for AprilAire whole house air purifiers, featuring a MERV 13 rating to effectively capture airborne allergens and contaminants. Measuring 20x25x4 inches, this filter helps maintain healthier indoor air quality by reducing dust, pollen, and other particles. Ideal for allergy sufferers, it supports a cleaner home environment and optimal purifier performance. This pack includes one high-efficiency filter engineered for reliable, long-lasting use.