GSW WATER HEATERS GPVT-50 2**

The figure of 235 therms is computed by this site and is not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, which is 0.72 for this model, with the federal test's daily hot-water draw for the high draw pattern. The source is the DOE CCD, retrieved 2026-09-19. Among the 414 models registered as a gas tank at this draw pattern, the unit ranks 50th lowest energy use of 414, which places it in the lowest quarter of its class. Both the rank and the 25 therms gap to the median apply only at the federal test's draw. The calculation is described in how the annual cost is calculated.

This model has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 97 gallons, and a rated volume of 48 gallons. The registry lists it under the high draw pattern, which describes a larger household, or one where showers and laundry overlap. The 235 therms figure therefore fits readers checking a home of that kind. It does not describe a household with lighter hot-water use, because the figure rests on a test draw that may not match theirs. The registry does not record how any home actually uses hot water, so actual use is not available here. A selector by fuel, space and size is available for narrowing options.

The running cost is not stated in the text because it depends on the state average residential gas price, which differs by reader. That price, applied to the 235 therms figure, gives the yearly cost at the federal test's draw. The cost calculator on your own ZIP computes it. The installed price appears in its own block on the page, as a modeled range and not a quote, so it is not restated here. To compare against other gas tank models at the high draw pattern, use the same-class replacement search by model number with GPVT-50 2**, and check the class median of 260 therms against this unit's figure.