Richmond PROG50S-40U RH60 EC1*

The registry does not print the 269 therms figure. This site computed it from the model's UEF, the ratio of hot water delivered to energy used. It also used the DOE test's daily hot-water draw for the high draw pattern. The registry lists this model's UEF as 0.63, and the source is the DOE CCD, retrieved 2026-09-19. Ranked by energy use, the model is 320th lowest of the 414 gas tank models at the same draw pattern. That puts it in the highest quarter of its class for energy use. The page on how the annual energy and running cost are calculated explains how UEF becomes annual energy. Your actual use will differ if your household draws more or less hot water than the test assumes. The data does not show by how much.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The registry lists a rated volume of 48 gallons for this model. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 85 gallons. A plumber checking a sizing claim can compare that rating with the household's demand in its busiest hour. The data shown here covers only the high draw pattern, so no figure for a smaller household is available. The model fits less well where low gas use within this class matters most, given its rank noted above. To look for lower use at the same draw pattern, you can find a same-class replacement by model number. The water heater selector by fuel, space and size covers other fuels and tank sizes.

The text on this page gives no running cost. The yearly cost of 269 therms of natural gas depends on your state's average residential gas price. For that reason, the page computes the cost from your ZIP instead of giving one figure for every reader. You can run it in the running cost calculator for your own ZIP. Your rate also sets the yearly cost of the 9 therms gap to the class median, so that cost depends on where you live too. Both results assume the high draw pattern. Heavier or lighter real use would change them, and the data does not show by how much. The installed price range appears in its own block with its source and date. It is a modeled installed-cost range, not a quote.