A. O. SMITH ENLB-30 1**

This site calculated the 2,522 kWh figure; the registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, which is 0.89 for this model. It also uses the federal test's daily hot-water draw for the low draw pattern. The data come from the DOE CCD, retrieved 2026-09-19. The figure applies only at that test draw. Actual use in a household that draws more or less hot water is not available from this data. It is a computed figure at fixed conditions, not a metered measurement of any installed unit. The method used for the annual calculation is documented separately.

Among the 163 models registered as an electric tank at the low draw pattern, this model has the 143rd lowest energy use. That places it in the highest quarter of its class for energy use, 83 kWh above the class median of 2,439 kWh. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 43 gallons, and its rated volume is 26 gallons. The low draw pattern represents a small household, so these figures describe that use. A reader ranking purely by low annual energy use will find this model above the median. A household that draws more hot water than the test assumes is outside what this page measures. To compare within the same class, find a same-class replacement by model number.

The running cost of 2,522 kWh depends on your own utility electricity tariff, so no cost amount is written here. Multiplying 2,522 kWh by your rate gives the yearly cost at the test draw. The 83 kWh gap to the class median is priced at the same rate. The cost calculator on your own ZIP does this calculation for you. An installed price range is not published for this model. Its ratings lie outside the range the cost database's model was fitted on, and that range is not stretched past its limit. If you need a different fuel, space or size, the selector by fuel, space and size covers those filters.