GE GG40S**AYV01

The figure of 176 therms is calculated by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.63 with the daily hot-water draw that the DOE test applies to the medium draw pattern. The fuel is natural gas, and the source is DOE CCD, retrieved 2026-09-19. The class is the 288 models registered as a gas tank at this draw pattern, and its median is 185 therms. This model sits 9 therms below that median, at 62nd lowest, which is in the lowest quarter of its class. The method used for the annual figure is documented separately.

The medium draw pattern describes a typical household on a busy morning, so the figure fits homes whose hot-water use resembles that pattern. The tank is rated at 40 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 72 gallons. Those two values describe capacity; the annual figure above comes from the UEF of 0.63 and the draw pattern. A household with heavier or lighter use than the test draw will have a different annual figure, and this page has no annual energy for other draw patterns. That value is not available here. To compare units by fuel, space and size, use the water heater selector.

Running cost is not written on this page because it depends on your state's average residential gas price, which differs from place to place. The cost calculator takes your ZIP and applies that price to the 176 therms at the medium draw pattern. Any result carries the same condition as the energy figure: it reflects the federal test draw, not measured use in a particular home. The installed-price range appears in its own block with its source and date, and this text does not restate it. If you need a unit in the same class, you can find a same-class replacement by model number, starting from GG40S**AYV01.