THE HONEYWELL 50000293-003 POST Filter FOR 20X20 F300 AND F50F ELECTRONIC Air CLEANERS. MUST BE ORDERED IN MULTIPLES OF 10 (FIVE 2-PACKS OF 20X10).
The 50000293 Series high-efficiency, charged postfilters boost the efficiency of any Honeywell electronic air cleaner with negligible effect on pressure drop.