I'm trying to get the size of a Westinghouse split system. I can only get the model number off the A/H. The condenser does not have anything on the unit or compressors. Can anyone identify the size of this air handler. It's a Westinghouse model AR040K2X. This looks to be about a 10 ton unit, so it's not a 3 1/2 ton using the 040 as a reference.