Replacement Cartridge Filter 7FR0-2020 Airflow Systems. Replacement Element for Part Number Airflow Systems 7FR0-2020 Filter. 16" x 11.5" X 9.63 OO (150 sq. ft), Sq FT Media Blend FR. Airflow Systems is a registered trademark of the respective company. 7FR0-2020 Replacement Cartridge Filter 7FR0-2020 Airflow Systems.Our Replacement filters Work As Good Or The Same As The OEM Filters. We guarantee their performance. Some of the filters are non stock items and cannot be returned. Please see our return policy.