How do you tell the tonnage off of a trane air conditioner name plate?

The tonnage of a Trane air conditioner can be found on the unit's nameplate. The nameplate is typically located on the side or back of the unit. Look for the model number, which will be a combination of letters and numbers. The tonnage will be listed near the model number, usually followed by the letter "T". For example, if the model number is 4TXCB048B1000C, the tonnage is 4.0T.