Honeywell cells are symmetrical so they can be used with airflow going right or left. The cell is simply flipped around for the opposite airflow.
Includes one plastic handle 137266. The handle can mount on either end of the cell allowing the cell to be rotated and used with airflow running in either direction. Determine the side of the cell that will be facing out before installing the handle.
Since 1975 all F50A F50E F50F F300 use cells listed in the first 4 tabs above. The FC37A1171 is only used in the F52 grille mount. The current production cells are the same as the early cells that had the red fiberglass contact pad.
The Honeywell FC37A1064 cell can be identified by the part number stamped into the aluminum. The text Honeywell Residential is stamped in the end facing out and the part number is stamped into a side edge, see photo below.
The FC37A1064 is used in F300E1035 F300A2025 F50F1065.
Used in F300A2012 F300F2012 F50F1040 F50F1057.
All F50A F50E units size 20×25 and 20×12½.