Carrier Residential Electric Heat Strips: current part numbers end with an "A". For example, a FE4AN fan coil calls for a KFCEH2601C10A 10KW heater. Carrier Enterprise doesn't list that part number - just KFCEH2601C10. Some of the box labels actually show the "A" on the barcode at the bottom left hand corner of the label and others do not.

Can anyone tell me the difference between the KFCEH2601C10 and KFCEH2601C10A? I doubt it's anything major, but I would like to know.

Thanks!