Air Filter 20x20x1 MERV 13 AC Filter, HVAC, Furnace Filter, 4 Pack ACTUAL SIZE (19.75 x 19.75 x 0.75) AC Filter, Furnace Filter, Allergies, Dust, Pet Dander & Smoke MERV 13 (MPR 1500 / FPR 10)

Nominal size: 20x20x1;
Actual size: 19 3/4" x 19 3/4" x 3/4"; This MERV 13 filter is comparable with MPR 1500-1900 & FPR 10. Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, smoke, viruses, and bacteria. Simple to install and a cost-effective step toward a healthier home environment. For best results, change your filters every 60 to 90 days, increasing the frequency to every 30 days during peak summer and winter months. 100% synthetic electrostatic media provides high efficiency with low airflow resistance. Manufactured by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier, and more productive