SURE COMFORT PROG40-38U RH62 EC1*

The 191 therms figure is computed by this site, not taken directly from the registry. It starts from the UEF, the ratio of hot water delivered to energy used, which the registry lists as 0.58 for this unit. It then applies the DOE test's daily hot-water draw for the medium draw pattern. That pattern represents a typical household's daily hot-water use in the federal test. The source is the DOE CCD, retrieved 2026-09-19. The figure holds only at the test's daily draw. A household that uses more or less hot water will see a different total. This page has no figure for other usage levels. The method is set out in how the annual cost is calculated.

Against the 288 gas tank models at the medium draw pattern, this unit sits 6 therms above the class median of 185 therms. It ranks 231st lowest in energy use, which places it in the highest quarter of its class for energy use. Those two figures are the registry-based points to match when verifying a listing or a quote. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 71 gallons. The rated volume is 38 gallons. A household that needs more than 71 gallons within its busiest hour falls outside what this rating covers. To compare lower-use models of the same type, you can find a same-class replacement by model number.

The running cost is not stated in this text. The cost of 191 therms of natural gas a year depends on your state's average residential gas price. The page therefore computes it from your ZIP, and the cost calculator on your own ZIP applies that rate to this model. At any single rate, the 6 therms gap noted above means a higher running cost than a median model in this class. The installed price range appears in its own block as a modeled range with its source and date, not a quote. Running costs under other draw patterns or usage levels are not available on this page.