Rheem PROG40-34N RH62 MH

This site computed the 188 therms figure. The registry does not list 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 pattern. For this model the UEF is 0.59. The registry values come from the DOE Compliance Certification Database, retrieved 2026-09-19. The medium pattern stands for a typical household with a busy morning of hot-water use. A home that draws more or less hot water than the test assumes will use a different amount of gas than 188 therms. The steps behind the figure are on the page explaining how the annual cost is calculated.

The class is the 288 models registered as a gas tank at the medium draw pattern. Within that class, this model ranks 186th lowest in energy use of 288. The class median is 185 therms, so at the test draw this model uses 3 therms more per year. Its rated volume is 38 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 57 gallons. These figures describe a household whose use fits the medium pattern. They do not describe a household with heavier daily use, and this page gives no figure for that case. To compare other models in the same class, use the same-class replacement search by model number.

The text does not state a running cost for this model. That cost depends on the average residential gas price in the reader's state. The page computes it from your ZIP code, using the 188 therms figure at the medium draw pattern. The same 188 therms costs more where the state gas price is higher. The 3 therms gap to the class median also changes with that price. You can run the numbers in the cost calculator on your own ZIP. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote. This page has no cost for any specific home.