I replaced a residential 3 ton capacity Westinghouse a/c unit a few years ago, that was from the 1950's ; it had a pancake compressor and a huge cabinet measuring about 42" long by 36" wide by 55" high. It weighed ALOT . Had to cut it up. The a/c still worked and cooled ; pressures looked okay on the compressor too. They just wanted something more economical to operate.