Product review (2 stars): NOT a substitute for "E" type - rpwfE; DOES NOT have the RFID Chip!!
I don't know how I'd improve the item listing but I missed the notation about not being a substitute for RPWFE. The "E" model has a chip that must be ther for teh unit to recognize the filter. The 3 pack of generic filters cost less than 1 "E" type filer. I don't now how I didn't see the notice but I missed it and apparently many other do also.