RELIANCE WATER HEATERS GPVNT-40 1**

This site calculated the 232 therms figure; the registry does not list it. 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 unit's UEF is 0.73. The inputs come from the DOE CCD, retrieved 2026-09-19. So the figure holds only at the federal test's daily draw. If a household's daily use is different from the test draw, the figure does not describe that household directly. The registry gives no adjusted value for other levels of use, so no adjusted figure is available here. The steps behind the number are set out in how the annual energy and cost are calculated.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. This model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 91 gallons. Its rated volume is 38 gallons. Among the 414 models registered as a gas tank at the high draw pattern, it ranks 33rd lowest for energy use. That puts it in the lowest quarter of its class. The class median is 260 therms a year at the test's draw, and this model sits 28 therms below it. To compare a different unit against the same class, use the same-class replacement search by model number.

The comparison with 260 therms holds only inside the high draw pattern class for gas tanks. Models of another heater type or draw pattern are not among the 414 compared here, so this rank says nothing about them. The running cost does not appear in this text. It depends on your state's average residential gas price, applied to 232 therms a year. The page works it out from your ZIP, and the cost calculator for your own ZIP repeats that step for any rate. The installed-cost range appears in its own block, with its source and date. It is a modeled range and not a quote.