GE GG40T**BXR01

The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.64 for this model. This site did not read 264 therms from the registry. It computed the figure from that UEF and the DOE test's daily hot-water draw for the high draw pattern, using DOE CCD data retrieved on 2026-09-19. Among the 414 models registered as a gas tank at the high draw pattern, this one ranks 236th lowest energy use. That puts it in the second-highest quarter of its class for energy use. Its figure sits above the class median of 260 therms by 4 therms.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. For that use, this tank has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 83 gallons, with a rated volume of 40 gallons. Those two values describe capacity. The registry data used here does not say whether that capacity meets a particular household's needs. The 264 therms figure applies only to the high draw pattern. A household whose hot-water use differs from the federal test's daily draw should not read it as its own use, and no figure for other draw patterns is available here. The selector by fuel, space and size filters models on those inputs.

Running cost is not stated in the text, because it depends on the state average residential gas price for the reader's location. The cost calculator takes a ZIP and applies that price to 264 therms of natural gas. How the annual cost is calculated is documented separately, including the fact that the therms are computed from the registry's UEF and are not metered. Actual use in a home can differ from 264 therms, and this page has no measured data on that. The modeled installed-cost range appears in its own block with its source and date, so it is not repeated here. To compare with similar units, find a same-class replacement by model number and check it against the 414 models in this class.