Rheem RTG-70XLN-3

The 206 therms figure is calculated by this site. The registry does not publish it. 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 high pattern. For the RTG-70XLN-3, that UEF is 0.82. The result applies only at the federal test's daily draw. A home that uses more or less hot water than the test will use a different amount of gas. This page does not have that amount. The rating comes from the DOE Compliance Certification Database and was retrieved on 2026-09-19. The steps behind the annual figure are explained in how the annual cost is calculated.

The high draw pattern represents a larger household, or one where showers and laundry overlap. The 206 therms figure describes that level of use. The registry also lists this unit's maximum flow rate in gallons per minute as 4. A household with lighter daily use does not match the pattern this model was tested at. For that home, its annual figure does not apply. Within its class, the RTG-70XLN-3 ranks 229th for lowest energy use among 397 models. A reader who wants lower gas use at the same pattern will find models ranked ahead of it. To look up registered models in the same class, use the tool to find a same-class replacement by model number.

This page does not state a running cost for the 206 therms a year. That cost depends on your state's average residential natural gas price, so the page calculates it from your ZIP. You can see the result by entering your ZIP in the water heater cost calculator for your own ZIP. The same rate also sets the cost of the 24 therms gap between this unit and the class median of 182 therms. Without your rate, that cost cannot be calculated. The 229th rank comes from energy use, so your rate does not change it. The installed price range appears in its own block, with its source and date. It is a modeled range of installed costs, not a quote.