Richmond PROG48-48U RH EC1

The 264 therms figure is computed by this site, not taken from the registry. It combines the model's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high pattern. This unit's UEF is 0.64, and the result holds only at that test draw. The UEF comes from DOE CCD, retrieved 2026-09-19. Among the 414 gas tank models at high, it ranks 236th lowest in energy use. That places it in the second-highest quarter of its class for energy use. The page on how the annual energy and cost figures are calculated sets out each step of the method.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The 264 therms figure describes that level of use, and only that level. This model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 88 gallons. Its rated volume is 46 gallons. A household that draws a different amount of hot water each day than the test assumes would not match the 264 therms figure. The registry gives no energy figure for that case, so it is not available here. To check other gas tanks registered at the same high pattern, use the same-class replacement search by model number.

Running cost is not stated in this text. It depends on your state's average residential gas price, applied to the 264 therms this model uses a year at the high pattern. The page computes that cost from your ZIP rather than estimating it. The water heater cost calculator for your ZIP applies your state's rate to this model. Because its energy use sits 4 therms above the 260 therms class median, its running cost at the same gas price will be higher than that of a model at the median. The modeled installed-cost range appears in its own block, with its source and date. It is a modeled range, not a quote.