What is tonnage on Goodman model G8C130301?

The Goodman model G8C130301 is a gas-fired furnace with a tonnage rating of 2.5 tons. This refers to its capacity to heat a space equivalent to what would be required for a 2.5-ton air conditioning system. Tonnage in this context is a measure of heating output, typically expressed in BTUs (British Thermal Units) per hour, and indicates the furnace's ability to efficiently warm a designated area.