Richmond PROG40-38U RH62 EC1*

This site computed the 191 therms figure; the registry itself does not publish it. The calculation combines the registry's UEF, the ratio of hot water delivered to energy used, with the daily hot-water draw set by the DOE test for the medium pattern. For this model the UEF is 0.58, as listed in the DOE Compliance Certification Database, retrieved 2026-09-19. The medium draw pattern represents a typical household of moderate size with a busy morning of use. The figure therefore describes the test day, not a specific home. A household that draws more hot water than the test assumes will use more gas than 191 therms a year. One that draws less will use less. The full steps are set out in how the annual cost is calculated.

Against its class, this model ranks 231st for lowest energy use among the 288 gas tank models at the medium draw pattern. That puts it in the highest quarter of the class for energy use, at 6 therms a year above the class median. On capacity, the registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 71 gallons. The rated volume is 38 gallons. For a plumber or seller confirming a like-for-like swap, these two figures are the capacity check. A household whose busiest hour needs more than 71 gallons is outside what this rating covers. A reader who wants lower gas use at the same draw pattern should know that the models ranked ahead of it use less. To list them, find a same-class replacement by model number.

The running cost is not stated in this text. It depends on your state's average residential gas price, so the page computes it from your ZIP and the 191 therms figure. The same applies to the 6 therms gap from the class median: its cost is known only at your own rate. You can rerun the figure with the cost calculator on your own ZIP. The installed price range sits in its own block with its source and date. It is a modeled installed-cost range, not a quote. Neither block changes the 191 therms figure, which stays fixed at the test's medium draw.