I have an old Fedders (1976). I know the year only becuase when I bought the house 20 yrs.ago,I was given the paper work from the install (12 yrs prior to my purchase of the home). It died on me a couple of days ago and I am going to put a new on in. I can find a name plate,so I have know idea what size it is. I did find a paper tag on the inside of the door,that had some various model #'s on it. They're CCX080BIA,CCX120BIA & CCX140BIA. Obviously,they are the same model # with different BTU output. I would like to find out which I have. I don't know if they can be determinded by the cabinet size.But if it can be,the cabinet size is:height 50" width 22" and depth 28". If you can help,it would be greatly appreciated.