Richmond PROG40-36U RH67 PV*

The registry does not print the 173 therms figure. This site computed it from two inputs. The first is the registry's UEF, the ratio of hot water delivered to energy used. For this model the UEF is 0.64. The second input is the DOE test's daily hot-water draw for the medium draw pattern. The source is DOE's Compliance Certification Database (CCD), retrieved 2026-09-19. The figure therefore describes gas use under the test's fixed daily draw, not the habits of any particular home. This page has no data on actual use in a given household. The inputs and steps are set out in how the annual cost is calculated.

The tank has a rated volume of 39 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 67 gallons. The medium draw pattern reflects a typical household's daily use, so the energy figure fits a reader checking a unit for that kind of home. A home whose busiest hour needs more than 67 gallons falls outside what this rating covers. The class ranking given above compares this model only with gas tank models at the medium draw pattern. It says nothing about heat pump or tankless units, which the registry groups in other classes. To compare with models in the same class, use find a same-class replacement by model number.

This text states no running cost. The cost of 173 therms of natural gas depends on your state's average residential gas price. For that reason the page computes it from your ZIP, not from a fixed rate. The same applies to the 12 therms gap to the class median described above: it is gas volume under the test draw, and its cost depends on the rate used. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote, and it is separate from running cost. To see the yearly cost at your own gas price, open the cost calculator on your own ZIP.