STATE GPDNL-40 1**

The 242 therms figure 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, with the DOE test's daily hot-water draw for the high draw pattern. This model's UEF is 0.7, from DOE CCD data retrieved 2026-09-19. Among the 414 gas tank models at the high draw pattern, it ranks 90th lowest in energy use. That places it in the lowest quarter of its class. The figure applies only at the test's daily draw. The registry data does not give this model's use at any other daily draw. The page on how the annual cost is calculated explains the method behind these figures.

The high draw pattern describes a larger household, or one where showers and laundry overlap. For that pattern, this model lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 75 gallons. Its rated volume is 38 gallons. A plumber or seller can compare both values with the same registry fields for any other gas tank model. The 242 therms figure does not describe a household that draws much less hot water. The data has no figure for this model at a lower draw pattern. The class covers gas tank models only, so the figure does not compare this unit with other fuels. The selector by fuel, space and size covers those other options.

The running cost is not stated in this text. It depends on your state's average residential gas price, so the page computes it from your ZIP. The same 242 therms of yearly use can therefore cost different amounts in different states. The 18 therms gap below the 260 therms class median also has no fixed money value; it depends on your rate. To see the cost for your address, use the cost calculator on your own ZIP. The modeled installed-cost range appears in its own block, with its source and date. It is a modeled range, not a quote, and this text does not repeat its figures.