A. O. SMITH GURT-50RL 4**

The figure of 269 therms is not a registry value. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, of 0.63, and from the daily hot-water draw the DOE test assigns to the high draw pattern. The source is DOE CCD, retrieved 2026-09-19. At the same draw, a higher UEF gives fewer therms, so the UEF is the input that sets this result. Among the 414 models registered as a gas tank at the high draw pattern, this model sits 9 therms above the class median of 260 therms. Its rank is 320th lowest energy use of 414, which places it in the highest quarter of its class for energy use.

The registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 92 gallons for A. O. SMITH GURT-50RL 4**. The rated volume is 49 gallons. The 269 therms applies only at the high draw pattern. Whether 92 gallons covers a particular household's busiest hour is not in the registry data, so that comparison is left to the reader. A reader who puts low energy use first should note that this model uses 9 therms more than the 260 therms class median. The water heater selector filters by fuel, space and size, and can be used to check a different combination.

Running cost is not stated in this text because it depends on the state average residential gas price, which differs by reader. The cost calculator applies that price to 269 therms once a ZIP is entered, and how the annual cost is calculated is documented separately. Actual household use will differ from the test draw, and no measured home usage is available for this model. A modeled installed-cost range appears in its own block on this page, with its source and date, and it is not a quote. To compare against another unit in the same class, find a same-class replacement by model number, starting from GURT-50RL 4**.