Geese... you just can't seem to get your story straight..... if it has an expantion valve on it, its either an RCHJ or an RCGJ, NOT an RCBA. The RCBA-048 is 21 inches wide, the RCHJ/RCGJ-48A2 coils are 24 inches wide. I suppose that you are still using a one-speed furnace with it?? To actually
*GET* 13 SEER with any of the Rheem "M" coils require a variable speed blower....but you already knew that. As I said, a RAND-048JAZ, with the *correct* coil and furnace combination, *installed* is $6,000 - 7,000.