Ruud PROG50-38N RH60 *

The 264 therms figure is computed by this site, not taken from the registry. It combines the model's UEF, the ratio of hot water delivered to energy used, with the test's daily draw. The registry lists a UEF of 0.64 for this model, retrieved from the DOE CCD on 2026-09-19. Among the 414 models in its class, it is 236th in order of lowest energy use. That places it in the second-highest quarter of its class for energy use. The full method, including the daily draw used, is set out in how the annual cost is calculated.

This model is tested at the high draw pattern, which fits a larger household, or one where showers and laundry overlap. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 85 gallons. The registry gives a rated volume of 48 gallons for this gas tank. A smaller household with lower daily use sits outside the high pattern this rating describes. Its 264 therms a year holds only at the test's daily draw. The data gives no figure for a household that uses more or less hot water.

The running cost is not stated here, because it depends on your state's average residential gas price. The page computes it from your ZIP, applying that price to the 264 therms a year at the high draw pattern. This text does not estimate the result or name an amount. You can run the same figure in the cost calculator for your own ZIP. To match this unit, you can find a same-class replacement by model number among the 414 gas tank models in its class. The installed price range appears in its own block with its source and date, as a modeled range, not a quote. What this model costs to run in a given home stays unknown until a local rate is applied.