AMERICAN GDVNT-50L 1**

The figure of 260 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 0.65 for this model, and the DOE test's daily hot-water draw for the high draw pattern. The source is DOE CCD, retrieved on 2026-09-19. It describes natural gas use under test conditions, so a home with different hot-water habits will use a different amount. This page has no figure for any other draw pattern. The calculation is set out in how the annual cost is calculated.

Among the 414 models registered as a gas tank at the high draw pattern, this one ranks 204th from the lowest in energy use. Its difference from the class median of 260 therms is 0 therms, so its use equals the median while it sits in the second-lowest quarter of its class. The high draw pattern describes a larger household, or one where showers and laundry overlap. For that use, the registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 84 gallons and a rated volume of 48 gallons. A household that fits a different draw pattern is not covered by this figure. The selector by fuel, space and size compares other combinations.

The running cost is not stated here because it depends on the state average residential gas price, which differs from reader to reader. The cost is the annual energy of 260 therms multiplied by that price, and the cost calculator on your own ZIP applies it. The result holds only at the high draw pattern; actual use in a particular home is not known to this page and is not estimated. The installed price range appears in its own block, with its source and date, as a modeled installed-cost range and not a quote. To compare a same-class alternative against this model's 260 therms, you can find a same-class replacement by model number. Every comparison here is made against the class median of 260 therms.