AMERICAN G9-UT5040NVR 5**

The figure of 264 therms is not a registry entry. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.64 for this model. It also used the DOE test's daily hot-water draw for the high draw pattern. A draw pattern is the standard daily hot-water usage DOE tests against, and high describes a larger household, or one where showers and laundry overlap. The source is the DOE CCD, retrieved 2026-09-19. The steps of the calculation are set out on the methodology page.

Among the 414 gas tank models registered at the high draw pattern, this unit ranks 236th lowest in energy use. That puts it in the second-highest quarter of its class. Its 264 therms is 4 therms above the class median of 260 therms. The unit's first hour rating, the gallons of hot water available in the first hour from a full tank, is 78 gallons, and its rated volume is 48 gallons. It fits a household that matches the high draw pattern. It does not fit a reader looking for the lowest energy use in this class, since its use is above the median. Energy use at other draw patterns is not available here. To compare units of the same class, use the replacement finder or the selector by fuel, space and size.

The running cost is not written in this text because it depends on your state's average residential gas price. That price multiplies the 264 therms shown above, and the result holds only at the federal test's draw. Your household's actual hot-water use is not in the registry data, so the real bill can differ from the tested figure. The cost calculator takes your ZIP and applies the gas price for your state. The modeled installed-cost range appears in its own block on the page with its source and date, and it is not repeated here.