ReplacementBrand 20 x 20 x 5 Micro Dust MERV 13 Replacement for Honeywell FC100A1011 and 5202013 Air Filter 2-Pack RB-DPFW20X20X5M13-2PK - The Home Depot
Honeywell FC100A1029 16x25x5 MERV 13 Comparable Air Filter - 2PK
Filterbuy 20x25x5 Air Filters, HVAC AC Furnace for Grille Honeywell (MERV 13) | eBay
21.5x27.5x5 MERV 13 Honeywell Air Filters - $47.50/ea.