RELIANCE WATER HEATERS T-H3J-DV-N 1**

The 180 therms figure is computed by this site, not taken 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. This model's UEF is 0.94, from DOE CCD data retrieved 2026-09-19. The figure holds only at that test draw. A household drawing more or less hot water will use a different amount of gas. Among the 397 models in its class, it ranks 165th lowest in energy use. That places it in the second-lowest quarter of its class for energy use. The method behind the annual figures explains each step of the calculation.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The registry lists a maximum flow rate in gallons per minute of 4.7 for this unit. That is the limit on hot water delivered at one time. Whether it covers a given set of fixtures depends on their flow rates, which are not in this data. A home using less hot water than the high draw pattern falls outside the condition behind the 180 therms figure. For such a home, energy use at a lower draw is not available on this page. The selector by fuel, space and size filters other registered units. The same-class replacement search by model number lists units in this class.

The running cost is not stated in this text. It depends on your state's average residential natural gas price, so the page computes it from your ZIP. Multiplying 180 therms by that rate gives the yearly cost at the high draw pattern. At any one rate, this model's cost differs from a median unit's by the price of 2 therms of gas. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote. Actual gas use away from the federal test draw is not known from the registry. The cost calculator for your own ZIP applies your rate to this model's figure.