AMERICAN GCRX-50 2**

The figure of 277 therms is a calculation, not a measurement of your home. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.61 for this model. It applies the daily hot-water draw that the DOE test uses for the high draw pattern. The registry does not publish this energy figure itself. The condition is natural gas at that test draw, and the source is the DOE CCD, retrieved 2026-09-19. Your own use will differ if your household draws more or less hot water than the test assumes. The methodology page explains how the annual cost is calculated from these inputs.

The high draw pattern describes a larger household, or one where showers and laundry overlap. This model has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 99 gallons. Its rated volume is 49 gallons. Within its class, it uses 17 therms more than the median of 260 therms. Its rank of 400th lowest of 414 places it in the highest quarter of its class for energy use. A reader whose priority is low gas use will find that the models ranked ahead of it use less energy at the same draw pattern. Energy use at any other draw pattern is not available on this page. The water heater selector filters by fuel, space and size.

Running cost is not stated in the text because it depends on your state's average residential gas price. Multiplying 277 therms by your local price per therm gives a yearly gas cost at the test draw. The cost calculator does this from your ZIP. The installed price appears in its own block with its source and date, as a modeled range and not a quote, so it is not restated here. To compare a like-for-like swap for AMERICAN GCRX-50 2**, you can find a same-class replacement by model number. The difference of 17 therms from the class median is measured in therms per year at the high draw pattern, and its cost effect depends on the same rate.