AMERICAN GCG-50 4**

The figure of 273 therms is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw. This model's UEF is 0.62 at the high draw pattern. The source is the DOE CCD, retrieved 2026-09-19. The result is a test-condition figure in therms of natural gas. It does not measure any one home's metered use, and that measured use is not available here. Comparison is limited to models registered as a gas tank at the high draw pattern, so the class is like for like.

The high draw pattern means a larger household, or one where showers and laundry overlap. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 81 gallons. Its rated volume is 48 gallons. Its rank is 367th lowest energy use of 414 models in the class. A reader who puts low gas use first will find most of the class ahead of it. A reader who needs that first hour rating and accepts above-median energy use may still consider it. The water heater selector filters by fuel, space and size. To compare models with the same fuel and draw pattern, find a same-class replacement by model number.

The registry does not state a running cost for this model, and this page does not estimate one. The cost depends on the state average residential gas price, which differs from reader to reader. Multiply 273 therms by your state's price per therm to get the yearly gas cost at the high draw pattern. The same multiplication applies to the 13 therms gap from the class median. The cost calculator on your own ZIP does this with the state average residential gas price. The method for the annual cost is documented separately. The modeled installed-cost range sits in its own block on this page, with its source and date, as a modeled range and not a quote.