The Honeywell model 50000293-003 is the original manufacturer's replacement post filter for Honeywell models F300E1027, F300A2020 and F50F1032 whole house Electronic Air Cleaners. The 50000293-003 will not fit the F50A or F50E series systems.
The size of the 50000293-003 post filter is approximately 20" x 20". Two filters are required for replacement with each 20" x 20" F300 or F50F electronic air cleaner you have installed in your HVAC system. These high-efficiency, charged post filters boost the efficiency of any Honeywell electronic air cleaner with negligible effect on pressure drop.
Honeywell recommends the replacement of the post filter media every 6 months. Regular replacement of the post filter will maximize the efficiency of your electronic air cleaner. The post filter is an optional filter that boosts the efficiency of the air cleaner. Do not wash the post filter because that will neutralize the factory applied charge.
For instructions on how to change your air cleaner filter and reset the indicator, please refer to your units Owner's Guide.
This package ships with 4 post filters. (makes TWO 20 x 20 post filter)