AMERICAN GPVL-50 2**

The figure of 235 therms is not a registry value. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used. It combined that UEF with the DOE test's daily hot-water draw for this draw pattern. The UEF listed for this model is 0.72. The high draw pattern describes a larger household, or one where showers and laundry overlap. The source is DOE CCD, retrieved 2026-09-19. A household with a different daily draw would use a different amount of gas, so the figure applies only to that test condition.

Its rank is 50th lowest energy use of 414 models registered as a gas tank at the high draw pattern. That is in the lowest quarter of its class for energy use. The class median is 260 therms, and this model sits 25 therms below it. Energy use at the test draw says nothing about how much hot water the tank delivers. The registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank. For this model it is 79 gallons, and the rated volume is 49 gallons. Whether that covers a given household's busiest hour is not in the registry data, so this page does not judge it. The water heater selector filters by fuel, space and size.

Running cost is not stated in the text. It depends on the state average residential gas price, which the page takes from the reader's ZIP. Multiplying 235 therms by that price gives the yearly gas cost at the test draw. The cost calculator does this for your ZIP, and the method behind the annual cost is documented separately. A household drawing more hot water than the test assumes would use more than 235 therms. By how much is not available in the registry data. The installed-cost range appears in its own block, with its source and date. For a same-class alternative, use the replacement lookup by model number.