What is the tonnage of an American standard ac unit 2A7B3042A1000AA?

The American Standard AC unit model 2A7B3042A1000AA has a tonnage of 3.5 tons. This is indicated by the model number, where "42" refers to the nominal cooling capacity in thousands of BTUs, and 42,000 BTUs divided by 12,000 BTUs per ton equals 3.5 tons.