Rheem RTGH-90DVLN-3

This site computed the 182 therms figure; the registry does not list it. The calculation 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 high pattern. This model's UEF is 0.93, as listed in the DOE CCD, retrieved 2026-09-19. At that rating, its yearly use is 0 therms away from the class median given above. It ranks 183rd lowest in energy use of 397 models, which places it in the second-lowest quarter of its class. A plumber or seller can check the UEF and model number against the registry entry. The page on how the annual energy and running cost are calculated sets out each step.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The 182 therms figure applies to that level of use only. The registry data here give no energy figure for this model at a lighter or heavier daily draw. The unit's registered maximum flow rate in gallons per minute is 4.9. Whether 4.9 covers a given home depends on that home's peak demand, which this page does not know. Readers who want to compare other fuels, spaces or sizes can use the water heater selector by fuel, space and size. Anyone replacing an existing unit can find a same-class replacement by model number.

The running cost does not appear in this text. The cost of 182 therms of natural gas depends on the reader's state average residential gas price. The page therefore computes it from the reader's ZIP, through the cost calculator for your own ZIP. Because this model's energy use equals the class median of 182 therms, its running cost at the same rate equals that of a median model in the class. That holds only at the high draw pattern and the federal test's daily draw. The installed price range appears in its own block, with its source and date, as a modeled range rather than a quote. How a specific household's actual hot-water use compares with the DOE test is unknown to this page.