AMERICAN GCRT-50 4**

This site computes the 277 therms figure; the registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the high draw pattern. For this model the UEF is 0.61. The source is the DOE CCD, retrieved 2026-09-19. The method behind the annual figure gives each step of the calculation. The figure holds only at the federal test's daily draw. A home that uses more or less hot water will use a different amount of gas, and this data does not give that amount.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. At that pattern, this model lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 89 gallons. Its rated volume is 48 gallons. Among the 414 models in its class, it ranks 400th lowest in energy use. That puts it in the highest quarter of its class for energy use. A reader who wants lower gas use at the same draw pattern will find that most models in the class use less. The same-class replacement search by model number lists those models.

The running cost is not stated in this text. It depends on the average residential gas price in the reader's state. The page applies that rate to the 277 therms figure, so the result changes from state to state. To see the cost on your own rate, use the cost calculator for your ZIP. That result is also tied to the high draw pattern, so it applies only at the federal test's daily draw. The installed price range sits in its own block on this page, with its source and date. It is a modeled installed-cost range, not a quote.