Richmond PROG40S-38N RH62

This site computed the 191 therms figure; the registry does not list it. 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 medium pattern. For this model, the UEF is 0.58. The result holds only at that test draw. A household that uses more or less hot water than the test assumes will use a different amount of gas. The registry data comes from the DOE Compliance Certification Database, retrieved 2026-09-19. Among the 288 models in its class, it ranks 231st lowest in energy use. That places it in the highest quarter of its class for energy use. The page on how the annual cost is calculated sets out each step of this method.

The medium draw pattern is DOE's model of a typical household's busy morning. This unit's first hour rating, the gallons of hot water available in the first hour from a full tank, is 65 gallons. Its rated volume is 39 gallons. These figures matter to a household whose peak demand fits the medium pattern. They matter less to a household whose peak demand is well above or below that pattern. In that case the 191 therms figure and the 231st rank do not describe its use. If you are verifying a swap, the comparison class here is gas tank at the medium pattern. The tool to find a same-class replacement by model number searches within that same class.

The text does not state a running cost. The cost depends on your state's average residential gas price, so the page calculates it from your ZIP. The 6 therms gap to the class median is an energy figure, not a cost figure. What that gap costs you each year depends on the same local rate. You can apply your own rate with the cost calculator on your own ZIP, which uses the 191 therms test-draw figure. A separate block on the page shows the installed price range with its source and date. That range is modeled; it is not a quote. The registry does not record this unit's gas use in any actual home, so that figure is not available.