Richmond PRO+G55-50N RH59

The 273 therms a year 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 draw. This model's UEF is 0.62. The result holds only at the daily hot-water draw set for the high draw pattern. A home that uses more or less hot water each day will use a different amount of gas. This page has no energy figure for other draw levels. The inputs come from the DOE CCD, retrieved 2026-09-19. Each step appears in how the annual cost is calculated.

The high draw pattern describes a larger household, or one where showers and laundry overlap. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 91 gallons. Its rated volume is 55 gallons. A plumber checking a replacement can compare both figures with the unit being removed. On energy use, it ranks 367th lowest of 414 gas tank models at the high draw pattern. That places it in the highest quarter of its class for energy use. Its 273 therms is 13 therms above the class median of 260 therms. To compare it with other models in the same class, use a same-class replacement search by model number.

Running cost is not given in this text. It depends on your state's average residential gas price. The page computes it from your ZIP, applied to the 273 therms at the high draw pattern. The cost calculator on your own ZIP shows that result. For a reader ranking on gas use alone, this model uses 13 therms a year more than the class median. The cost of that gap depends on your local gas price. The installed-cost range is shown in its own block, as a modeled range rather than a quote. This page does not know your household's actual daily draw, so your bill may differ from the computed figure.