Honeywell FC100A1011/U Replacement Media Air Cleaning Filter 20×4 20 MERV 11
Quality Filter. Cleaner Air. It has a low static pressure drop and is simple to replace.
Aprilaire 210 Replacement Air Filter Media – Brand New Genuine OEM
HEALTHY AIR APP COMPATIBLE – Unlock the full potential of your AprilAire Whole-House Air Purifier with the AprilAire Healthy Air App! EASY AS 1-2-3 TO INSTALL in the unique AprilAire Interlock Rail System.