Ruud PRO+G50-38U RH67 PD*

This site computed the 249 therms figure; the registry does not list it. The figure combines the registry's 0.68 UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high draw pattern. The source is DOE CCD data retrieved 2026-09-19. The figure holds only at that test draw. A home that uses more or less hot water each day will burn a different amount of gas, and this page does not have that amount. Among the 414 gas tank models at the high draw pattern, this unit ranks 164th lowest in energy use. That places it in the second-lowest quarter of its class. The method is set out in how the annual cost is calculated.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The registry lists a 86-gallon first hour rating, the gallons of hot water available in the first hour from a full tank. It also lists a rated volume of 48 gallons. A plumber or seller checking a sizing claim can compare those two figures with the listing. A smaller household that uses less hot water than the test draw falls outside the condition behind the 249 therms figure. For that home, annual energy use at its own draw is not available here. To compare other fuels, spaces or sizes, use the selector by fuel, space and size. To stay within this model's class, find a same-class replacement by model number.

The running cost is not written in this text because it depends on your state's average residential gas price. The page computes it from your ZIP, applied to the 249 therms of natural gas at the high draw pattern. Enter your ZIP in the cost calculator for your own ZIP to see that figure. The installed price range appears in its own block, with its source and date. That range is a modeled installed-cost range, not a quote. Neither figure accounts for a household that draws more or less hot water than the DOE test assumes. The 11 therms gap to the class median also holds only at that test draw.