Ruud RTG-84DVLN-1

The registry does not print the 206 therms figure. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.82 for this model. That ratio is combined with the daily hot-water draw that the DOE test sets for the high draw pattern. That pattern stands for a larger household, or one where showers and laundry overlap. The source is the DOE CCD, retrieved 2026-09-19. The figure is a test-condition value, not a reading from any home. How much gas a specific household uses is not available here. The steps behind the conversion are set out in how this site calculates annual energy and cost.

The summary above places this model above its class median. By rank, it is 229th for lowest energy use among the 397 models in its class. That puts it in the second-highest quarter of the class for energy use. The registry also lists a maximum flow rate in gallons per minute of 4.5 for this unit. The energy figure describes a home that matches the high draw pattern. It does not describe a home that uses less hot water than the test assumes. A reader looking for a same-class model with energy use below 182 therms can find a same-class replacement by model number. Whether 4.5 gallons per minute covers a given home's peak demand depends on that home's fixtures, and this page has no data on them.

This text gives no running cost, because the cost depends on the average residential gas price in the reader's state. Once a ZIP is entered, the cost block multiplies 206 therms by that state price. The same result can be rechecked in the water heater cost calculator for your ZIP. A household whose own gas rate differs from its state average will see a different result, and that rate is not available to this page. The installed-cost range appears in its own block, with its source and date. It is a modeled range, not a quote from an installer. Both figures rest on the high draw pattern condition described in the first section.