Rheem RTG-70XLN-1

This site computed the 209 therms figure; the registry does not publish 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 draw pattern. For the RTG-70XLN-1, the registry lists a UEF of 0.81. The registry data behind the figure comes from the DOE CCD, retrieved 2026-09-19. The figure holds only at the federal test's daily draw, not at any household's actual use. A home that draws more or less hot water each day than the test will get a different annual figure. Each step is 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. The 209 therms figure applies to homes that fit that pattern, not to a smaller household with a lower daily draw. The unit's maximum flow rate in gallons per minute is 4. With the 27 therms gap above the class median noted earlier, it ranks 323rd lowest in energy use of 397. Because it sits above the median, more than half of the models registered in this class use less energy on the same test. It does not fit a comparison where lower annual gas use at this draw pattern decides the choice. To compare other models in this class, use the same-class replacement search by model number.

The text on this page does not state a running cost. That cost depends on your state's average residential gas price, so the page computes it from your ZIP. It starts from 209 therms of natural gas a year at the high draw pattern. The 27 therms gap to the class median only becomes a cost gap after your own gas price is applied. To see both figures, enter your ZIP in the water heater cost calculator for your ZIP. The installed price range has its own block, with its source and date. That range is modeled and is not a quote. The installed price for your own home is not available on this page.