U.S. CRAFTMASTER GUC 40 4**

This site computed the 264 therms figure; the registry does not state it. The figure 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. This model's UEF is 0.64. The source is DOE's Compliance Certification Database (CCD), retrieved 2026-09-19. Among the 414 gas tank models registered at the high draw pattern, this unit ranks 236th lowest for energy use. That puts it in the second-highest quarter of its class for energy use. Its 4 therms yearly gap over the 260 therms class median holds only at the test's daily draw. A household that draws more or less hot water than the test assumes will use a different amount. The page on how the annual cost is calculated sets out each step.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. This model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 83 gallons. Its rated volume is 38 gallons. If a household's busiest hour draws up to 83 gallons, its use falls within what this rating describes. If its busiest hour needs more than 83 gallons, its use falls outside what this rating covers. The registry data does not show how the unit performs after that first hour, so that information is not available here. To compare other units, use the water heater selector by fuel, space and size. To list models in the same class from a model number, use the same-class replacement search.

The running cost does not appear in this text. The cost of 264 therms of natural gas a year depends on the reader's state average residential gas price, and the registry data does not include that price. The page works it out from the reader's ZIP instead. The cost calculator for your own ZIP applies that rate to this model's figure. The same rate applies to the 260 therms class median, so the 4 therms yearly gap converts on the same terms. This site does not know how closely a reader's actual use matches the high draw pattern. The installed price has its own block on the page, with its source and date. It is a modeled range, not a quote.