STATE GPDX-50L 3**

The 232 therms figure is calculated by this site. It does not come from 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. For the GPDX-50L 3**, the registry lists a UEF of 0.73. The source is the DOE CCD, retrieved 2026-09-19. The figure holds only at the federal test's daily draw. A household that draws more hot water than the test will use more gas than 232 therms. A household that draws less will use less. The steps behind the calculation are set out on the page on how the annual cost is calculated.

The high draw pattern describes a larger household, or one where showers and laundry overlap. For that use, the registry lists a rated volume of 48 gallons. It also lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 118 gallons. The class is the 414 models registered as a gas tank at the high draw pattern, and its median is 260 therms a year. At the federal test's draw, this model's 232 therms sits 28 therms below that median. It ranks 33rd lowest in energy use of 414, which puts it in the lowest quarter of its class. To compare a unit from the same class against these figures, you can find a same-class replacement by model number.

The class comparison applies only to gas tanks at the high draw pattern. It does not cover a home with a smaller daily draw or a home comparing fuels, and the 33rd rank says nothing about those cases. The selector by fuel, space and size covers those other classes. The running cost is not given in this text. It depends on your state's average residential gas price, so the page calculates it from your ZIP code in the cost calculator on your own ZIP. That same rate sets what the 28 therms gap below the class median is worth each year. The installed price range appears in its own block with its source and date. It is a modeled installed-cost range, not a quote.