How do tell the size of a goodman unit?

To determine the size of a Goodman unit, check the model number, which is typically found on the unit's label or nameplate. The model number often contains a code that indicates the unit's capacity in BTUs (British Thermal Units), usually in increments of 1,000. Additionally, you can refer to the specifications provided in the owner's manual or on the manufacturer's website for detailed information on the unit's size and performance.