Original Honeywell Factory Replacement Filter MERV 13 (More efficient than the previous MERV 10). These electrostatically charged filters are much more effective at catching dust than the F100 series.
20" x 20" x 4 3/8" (Actual Size: 19 7/8" x 19 5/8" x 4 3/8")
Replaces: FC35A1019
Fits Models: F35, F200, FC100F1020