Richmond PROG29-30U RH63 EC1*

This site computes the 185 therms figure. The registry does not publish it. The figure 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 medium draw pattern. This model's UEF is 0.6, and its fuel is natural gas. The medium draw pattern represents a typical mid-sized household on the federal test. The figure holds only at that test draw. A home that draws more or less hot water each day will use a different amount, and the data does not give that amount. The inputs come from DOE CCD, retrieved 2026-09-19. The page on how the annual energy and cost are calculated sets out each step.

This model's class is the 288 models registered as a gas tank at the medium draw pattern. Within that class, it ranks 89th lowest in energy use. The class median is 185 therms, and this model differs from it by 0 therms. Its energy use is therefore equal to the median, neither above nor below it. The rated volume is 28 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 51 gallons. A household whose use matches the medium draw pattern fits the test conditions behind these figures. A household that needs more than 51 gallons in its busiest hour is outside what this rating covers. To check other models in this class, use the same-class replacement search by model number.

The running cost is not stated on this page because it depends on your state's average residential gas price. The page applies that rate to the 185 therms of natural gas used at the medium draw pattern, and it finds the rate from your ZIP code. The cost calculator for your own ZIP code shows the result. No installed price range is available for this model. Its ratings lie outside the range that the cost database's model was fitted on, and the range is not extended beyond it. No figure is available for energy use at any draw other than the federal test's.