The Simply 14 in. x 14 in. x 1 in. MERV 13 Air Filter (actual size 13.75 in. x 13.75 in. x 0.75 in.) is a pleated HVAC furnace filter designed to create a healthier indoor environment by capturing airborne particles like dust, pet dander, lint, pollen, smoke, bacteria, and viruses. The filter media is an electrostatically charged synthetic material, comparable to 3M Filtrete MPR 1500-1900 and Honeywell FPR 10 ratings, that traps 98% of dust without restricting airflow. The filter features a heavy-duty, moisture-resistant beverage board frame with dual wire backing for enhanced durability and structural integrity. These US-made filters are designed for residential use in furnaces, air conditioners, or HVAC systems and are recommended to be replaced every 90 days for optimal performance