Ruud RTGH-84DVLN-3

The 182 therms figure is computed by this site, not published by the registry. It 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 RTGH-84DVLN-3, the UEF is 0.93, and the draw used is the one set for the high draw pattern. The source is DOE's Compliance Certification Database (CCD), retrieved 2026-09-19. The figure therefore describes use under the federal test's conditions, not a measured bill from any home. A household drawing more or less hot water than the test assumes will use a different amount; that amount is not available here. The steps are set out in how this site calculates annual energy and cost.

The high draw pattern describes a larger household, or one where showers and laundry overlap. Among the 397 gas tankless models registered at that pattern, the RTGH-84DVLN-3 ranks 183rd lowest in energy use. That places it in the second-lowest quarter of its class. Its maximum flow rate in gallons per minute is 4.5. Whether that rate covers a particular set of fixtures running at once is not stated in the data. For a home that fits a lower draw pattern, the 182 therms figure does not apply, and no figure for other patterns is available on this page. To check a same-class model against this one, use the replacement finder by model number.

Running cost is not written here because it depends on your state's average residential gas price. The page computes it from your ZIP instead, using the 182 therms figure at the high draw pattern. You can run the same calculation in the cost calculator for your own ZIP. Because its use is 0 therms from the class median of 182 therms, its running cost at a given gas price matches a median model's. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote, and its figures are not repeated here.