A 12 ton package unit is pretty rare most units are 10 ton 15 ton and 20 ton for Commercial units,I am in south florida and recycle commercial units all the time,a tipical 10 ton unit usally has 3 compressors 240 lbs of coils 30 lbs of copper ten lbs of #2 wire 20-30 lbs of freoon r-22 and about 600-800 lbs of tin shreadable