Ruud PRO+G50-65N RH62 PDV

The 260 therms figure is computed by this site, not taken from the registry. 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 this pattern. The registry lists a UEF of 0.65 for this model. The source is DOE's Compliance Certification Database (CCD), retrieved 2026-09-19. The figure holds only at that test draw. A home that draws more or less hot water will use a different amount of gas, and the registry data does not say how much. The steps are set out on the page explaining how this site calculates annual energy and cost.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The registry lists its first hour rating, the gallons of hot water available in the first hour from a full tank, as 111 gallons. Its rated volume is 48 gallons. A home that matches the high pattern is the case the 260 therms figure describes. A smaller household with lighter daily use falls outside that test condition, so the figure does not describe its gas use. The registry data does not show how this model performs outside the DOE test. For a home with different hot-water needs, the water heater selector by fuel, space and size filters models on those terms.

The rank given above places this model in the second-lowest quarter of its class for energy use. Other models registered as a gas tank at the high draw pattern share the same test basis. The same-class replacement finder by model number lists them. The running cost is not stated in this text because it depends on the average residential gas price in the reader's state. The page computes it from the reader's ZIP, applied to the 260 therms figure. The cost calculator on your own ZIP runs the same calculation for another location. The modeled installed-cost range appears in its own block, with its source and date, and is not a quote.