AMERICAN GCRX-55 2**

The figure of 273 therms is not a registry value. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.62 for this model, and from the DOE test's daily hot-water draw for the high draw pattern. It applies to natural gas only. The source is DOE CCD, retrieved 2026-09-19. Among the 414 models registered as a gas tank at this draw pattern, this model holds the 367th lowest energy use of 414. That places it in the highest quarter of its class for energy use. The method behind the annual figure is documented separately.

The high draw pattern describes a larger household, or one where showers and laundry overlap. For this model the registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 83 gallons, and a rated volume of 55 gallons. Those two values describe capacity, not efficiency. A household that needs that capacity should weigh it against the energy figure of 273 therms. A household whose priority is low gas use should note that this model sits 13 therms above the class median of 260 therms. The selector by fuel, space and size narrows models by those limits, and a same-class replacement can be found by model number.

The running cost is not stated here because it depends on your state's average residential gas price. Multiplying 273 therms by your own rate gives the yearly figure at the federal test's draw. The cost calculator for your own ZIP does this for you. The gap of 13 therms to the class median scales with the same rate, so it is a difference in gas use before it is a difference in cost. Actual household use may differ from the test draw, and the registry gives no measured figure for your home; that value is not available. The modeled installed-cost range appears in its own block with its source and date and is not repeated here.