Richmond RTG-95XLN-1

The 209 therms figure is not printed in the registry itself; this site calculated it for the high draw pattern. It combines the model's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for that pattern. The registry lists a UEF of 0.81 for this model, from DOE CCD data retrieved 2026-09-19. Because the calculation holds usage fixed at the test draw, the result describes the unit at the test's conditions only. A household that draws more or less hot water than the test assumes will see a different yearly total. Each step is set out in the page on how the annual figures are calculated.

Among the 397 models registered as a gas tankless unit at the high draw pattern, this one ranks 323rd lowest in energy use. That rank puts it in the highest quarter of its class, so most comparable models are calculated to use less gas. The high draw pattern stands for a larger household, or one where showers and laundry overlap. The registry lists this model's maximum flow rate in gallons per minute as 4.9. Whether that flow covers a particular home's fixtures is not shown in the registry data. To compare other units in the same class, use the same-class replacement search by model number.

The running cost is not stated in this text, because it depends on your state's average residential gas price. The page computes it from your ZIP; the cost calculator for your own ZIP shows the result. At any single gas rate and the test draw, the 27 therms gap means this unit costs more to run than the class median model. A home drawing less hot water than the high pattern assumes would use less than 209 therms; the exact amount is not available. The installed price range appears in its own block, with its source and date, as a modeled range rather than a quote.