White Rodgers FR1000 Type100 FILTER RETROFIT FOR Electronic Air Cleaners 10C24M, SST1000 ELECTRONIC AIR CLEANER. Case of 3White Rodgers FR1000 Type 100 Replacement Filter 21x5x16 This Filter Replaces the 2 Cells in the 21 x 16 WHITE RODGERS 10C24M, SST1000 Electronic Air Cleaners Convert System that has dimensions 21" x 16" to Media Air Filter Actual Size 16 1 4" x 21" x 5" To Convert from Electronic Air Cleaner to Media Air Cleaner, you will need to turn Power Switch Off for the Electronic Air Cleaner permanently and remove the 2 Cells, we highly recommend disconnecting