Ruud PROG50S-40U RH60 EC1*

The 269 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 for the high draw pattern. This model's UEF is 0.63, as rated under the high draw pattern. The result describes use at the federal test's draw, based on DOE CCD data retrieved on 2026-09-19. A household that draws more or less hot water than the test assumes will use a different amount. How large that difference would be is not available in the registry data. The method is set out in how the annual cost is calculated.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The registry lists its first hour rating, the gallons of hot water available in the first hour from a full tank, as 85 gallons. Its rated volume is 48 gallons. Among the 414 gas tank models at the high draw pattern, this one ranks 320th lowest in energy use. That places it in the highest quarter of its class for energy use. A household that uses less hot water than the high draw pattern falls outside the condition the 269 therms figure describes. To compare other models in the same class, use find a same-class replacement by model number.

This text states no running cost for the Ruud PROG50S-40U RH60 EC1*. The cost depends on your state's average residential gas price. The page applies that price to the 269 therms figure once you enter your ZIP. The cost gap against a model at the class median, described above, also depends on that same rate. The installed-cost range in its own block on this page is a modeled range with its own source and date, not a quote. To run the calculation on your own rate, open the cost calculator for your ZIP. Energy use under any draw other than the federal test's high draw pattern is not available from the registry.