AMERICAN GCR-40 2**

The figure of 264 therms is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.64 with the DOE test's daily hot-water draw for the high draw pattern. The source is the DOE CCD, retrieved 2026-09-19. It describes a gas tank run at the federal test's daily draw. A home that uses more or less hot water will burn a different amount of gas, and this page does not estimate that. The steps behind the calculation are set out in how the annual cost is calculated.

Against the 414 models registered as a gas tank at the high draw pattern, this unit sits 4 therms above the class median of 260 therms. Its rank is 236th lowest energy use of 414, which places it in the second-highest quarter of its class for energy use. The registry files it under the high draw pattern, meaning a larger household, or one where showers and laundry overlap. It lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 80, with a rated volume of 38 gallons. Whether that matches a particular home's peak demand is not in the data. To compare by fuel, space and size, use the water heater selector.

The running cost is not written here because it depends on your state's average residential gas price. Multiplying 264 therms by your own price per therm gives the yearly fuel cost at the test draw. The cost calculator does this from your ZIP. The installed price range appears in its own block on the page, with its source and date, as a modeled range and not a quote. The figures here come from a laboratory test, not from metering in a home, so actual gas use is not available from this data. To look at alternatives in the same class, find a same-class replacement by model number.