A. O. SMITH G6N-UT5040NVR 5**

The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.63 for this model. This site combined that UEF with the DOE test's daily hot-water draw for the high draw pattern to get 269 therms. The annual figure is computed by this site, not published by the registry, and the calculation method is documented. Source: DOE CCD, retrieved 2026-09-19. The class is the 414 gas tank models registered at the high draw pattern. Every model in the class shares the same daily hot-water draw, so the comparison is like for like. That rank places it in the highest quarter of its class for energy use.

This model is rated for the high draw pattern, which describes a larger household, or one where showers and laundry overlap. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 76 gallons. The rated volume is 48 gallons. Both are capacity figures; the annual figure of 269 therms comes from the UEF and the daily draw, not from capacity. Energy use for a lighter or heavier draw pattern is not available on this page. A reader whose priority is low energy use should note that the models ranked before 320th use less. For a comparison inside the class, use the same-class replacement lookup by model number.

The running cost is not stated in this text because it depends on the state average residential gas price. The cost calculator on your own ZIP applies that price to the 269 therms at the high draw pattern. Actual use in a home may differ from the federal test's daily draw, and measured home use is not available here. The class median of 260 therms carries the same condition, as does the 9 therms difference. The installed price range is shown in its own block with its source and date, as a modeled range and not a quote. Models can also be filtered with the selector by fuel, space and size.