RELIANCE WATER HEATERS G9-UT4040NVR 5**

This site calculated the 264 therms figure; the registry does not list it. It combines the model'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 this model the UEF is 0.64, taken from DOE's Compliance Certification Database (CCD) and retrieved 2026-09-19. The test fixes the daily draw, so the figure shows gas use on that standard test day. It does not describe use in any particular home. A household that draws more hot water than the test day will use more gas than 264 therms, and one that draws less will use less. Actual gas use in a given home is not available from the registry. The steps are set out in how the annual cost is calculated.

Among the 414 gas tank models at the high draw pattern, this model ranks 236th for lowest energy use. That places it in the second-highest quarter of its class for energy use, 4 therms above the 260 therms median. The high draw pattern stands for a larger household, or one where showers and laundry overlap. The registry lists a rated volume of 38 gallons. It also gives a first hour rating, the gallons of hot water available in the first hour from a full tank, of 83 gallons. The 264 therms figure applies only to households whose use matches the high draw pattern. For a household with lighter use, this page has no figure, because the registry does not give this model's energy use at a lower draw pattern. To compare models in the same class, find a same-class replacement by model number.

This text does not state a running cost. The cost of 264 therms of natural gas depends on your state's average residential gas price, so the page calculates it from your ZIP. The same applies to the 4 therms gap between this model and the 260 therms class median. That gap becomes a cost difference only at your own gas rate. The page does not estimate that difference here. You can run the calculation in the cost calculator for your own ZIP. The installed price range appears in its own block, with its source and date. It is a modeled range for installed cost, not a quote. Both the running cost and the installed range use the same class and draw pattern as the 264 therms figure.