Ruud RHE50

The 212 therms figure is not printed in the registry itself. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used. It also uses the DOE test's daily hot-water draw for the high pattern. The UEF recorded for the Ruud RHE50 is 0.8, taken from the DOE CCD as retrieved on 2026-09-19. Because the figure assumes the federal test's daily draw, a household using more or less hot water will see a different total. The method behind this step is set out in how the annual cost is calculated. Against its class, the 48 therms gap below the median places this model in the lowest quarter for energy use.

The high draw pattern covers a larger household, or one where showers and laundry overlap. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 87 gallons for this model. Its rated volume is 46 gallons, and both figures are registry values rather than site calculations. A plumber or seller checking a unit for that kind of household can compare them with the home's peak demand. To compare entries registered in the same class, use the same-class replacement search by model number. The 29th place out of 414 applies only among gas tank models at the high draw pattern.

A smaller household with lighter or separate hot-water use falls outside the high draw pattern, so the 212 therms figure does not describe it. For such a home, this page has no energy figure at a lower draw, and none is estimated here. Running cost is also not stated in the text, because it depends on the reader's state average residential gas price. The page computes that cost from your ZIP; the same calculation is available in the cost calculator on your own ZIP. An installed price range is not published for the RHE50. Its ratings lie outside the range the cost database's model was fitted on, and that range is not stretched past it.