The Honeywell FC100A1052 12.5" x 20" Replacement Air Filter boasts an upgraded MERV 11 rating (based on ASHRAE Standard 52.2) and is used with the Honeywell Enviracaire F27F1032 Air Cleaner.

• Nominal Dimensions: 12.5" x 20" x 5"
• Actual Dimensions: 12 3/8" x 20" x 4 3/8"
• Media: Pleated cotton and synthetic blend
• Merv 11 rating
• Captures 96% of particles 3 to 10 microns in size
• Pressure Drop: 0.236" w. c
• Updated Merv 11 framing

This filter should be replaced every 12 months, or at the first sign of pressure drop.