The Clean Comfort Merv 11 Replacement Filter for 1620 Media Cleaner 3-Pack is equipped with advanced features that ensure the comfort of your space. From their exceptional filtration efficiency to their durable, dependable design, these replacement filters are the best in their field. The replacement filters are also able to be mounted in any position and are configurable for reversible airflow. These are the features that make these replacement filters a worthwhile investment.