AMERICAN ENS-50 1**

The registry does not list annual energy for this model; this site computes it. The calculation takes the registry's UEF, the ratio of hot water delivered to energy used, which is 0.92 for this AMERICAN ENS-50 1**. It applies that value to the daily hot-water draw the DOE test uses for the medium draw pattern. The result is 3,531 kWh of electricity a year, and it is valid only at that draw. A household that draws more or less hot water than the federal test will use a different amount, which this page does not estimate. The source is DOE CCD, retrieved 2026-09-19. The steps are set out in how the annual cost is calculated.

Among the 426 models registered as an electric tank at the medium draw pattern, this one ranks 213th lowest for energy use. The class median is 3,531 kWh, and this model differs from it by 0 kWh. It therefore sits at the median, with no measured gap in either direction. The ranking compares only models tested at the same draw pattern, so it says nothing about other fuels or other draw patterns. For a reader checking a quoted figure, 3,531 kWh at the medium draw pattern is the value to match. If a same-class replacement by model number is needed, the same comparison can be repeated for another model in this class.

The energy figure suits a reader whose household matches the medium draw pattern as the federal test defines it. It fits less well when hot-water use differs from that pattern. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 57 gallons, and the rated volume is 46 gallons. A household that needs more than 57 gallons in its busiest hour falls outside that rating. Running cost is not stated in the text because it depends on your own utility electricity tariff applied to 3,531 kWh. The cost calculator using your own ZIP computes it. The modeled installed-cost range appears in its own block on this page, with its source and date.