The Honeywell model 50000293-004 is the original manufacturer's replacement post filter for Honeywell models F300E1035, F300A2012, F300B2012, F300A2025, F50F1065, F52F1048 and F52F1055 whole house Electronic Air Cleaners.
The 50000293-004 will not fit the F50A or F50E series systems.
The 50000293-004 post filter size is approximately 20" x 12 1/2". Two filters are required for replacement with each 20" x 25" electronic air cleaner model: F300E1035, F300A2025, F50F1065, and F52F1055. This 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 six (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 air cleaner's efficiency. Do not wash the post filter, as this will neutralize the factory-applied charge.
Please refer to your unit's Owner's Guide for instructions on changing your air cleaner filter and resetting the indicator.
This package ships with 2 x 2 packs of post filters (4 Filters for an Annual Supply).