Washable Aluminum Air Filter 20 x 30 x 1 - -
4,086. 1 offer from $59.99. Trophy Air 20x30x1 Washable Electrostatic HVAC Furnace Air Filter, Lasts a Lifetime, 6 Stage Permanent Air Filter, Healthier Home or Office, Made in The USA 20x30x1 - Increases Airflow. 4.6 out of 5 stars.