Richmond RTG-70DVLN-3

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, and from the DOE test's daily hot-water draw for the high draw pattern. The registry lists this unit's UEF as 0.82. The data comes from DOE CCD, retrieved 2026-09-19. The figure holds only at the federal test's daily draw, not at your household's actual use. A home that draws more hot water than the test will use more gas; a home that draws less will use less. The registry does not say how large that gap would be for a given home. The steps are set out in how this site calculates annual energy and cost.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The registry lists this unit's maximum flow rate in gallons per minute as 4. The registry does not say whether that rate covers the fixtures running at once in a particular home. Within its class of 397 gas tankless units at the high draw pattern, this model sits above the class median noted above. A reader who wants a gas tankless unit with energy use below that median can compare models with the selector by fuel, space and size. A plumber replacing this unit can look up same-class replacements 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 and applies that rate to 206 therms of natural gas a year at the high draw pattern. If your household draws more or less hot water than the DOE test, the cost changes the same way the energy figure does. To check the result on your own rate, use the cost calculator on your own ZIP. The installed price range on this page is a modeled installed-cost range, not a quote. Its source and date appear in its own block.