This quality non-OEM filter replaces Honeywell filter no. FC100A1011.
This filter comes with a MERV rating of 11. The higher the MERV rating, the higher the arrestance of particulate matter (or said differently, a higher MERV means more filtration).
Nominal Size: 20" x 20" x 5" (actual size: 19 1/2" x 19 1/2" x 4 1/4")