Ruud PROG50-38U RH67 PV*

The registry does not print the 249 therms figure. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.68 for this model. That ratio is combined with the DOE test's daily hot-water draw for the high draw pattern. The source is the DOE Compliance Certification Database, retrieved 2026-09-19. The page on how the annual cost is calculated sets out each step of that method. The figure holds only at the federal test's daily draw. A household that draws more or less hot water each day will use a different amount of gas. How large that difference would be is not available from the registry data.

Among the 414 gas tank models registered at the high draw pattern, this unit ranks 164th lowest for energy use. That places it in the second-lowest quarter of its class for energy use, not the lowest quarter. The high draw pattern describes a larger household, or one where showers and laundry overlap. For that use, the registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 86 gallons. The rated volume is 48 gallons. A plumber or seller confirming a like-for-like swap can find a same-class replacement by model number. This class comparison covers energy use only and says nothing about other features.

Every figure above describes a household at the high draw pattern. Whether this model suits a smaller household with lighter hot-water use is not something this data answers. Its energy use at any other draw pattern is not available on this page. The running cost is also not written in this text. It depends on your state's average residential gas price, so the page computes it from your ZIP instead. The 11 therms gap to the class median becomes a cost gap only once that price is applied. To see the running cost at your own rate, open the cost calculator for your own ZIP.