ARISTON ENS50T-DR***

The 3,531 kWh figure is computed by this site. The registry does not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the daily hot-water draw that the DOE test sets for the medium pattern. For the ENS50T-DR***, the UEF is 0.92, from DOE CCD data retrieved 2026-09-19. Among the 426 electric tank models at the medium draw pattern, this unit ranks 213th lowest in energy use. Its difference from the class median of 3,531 kWh is 0 kWh. That puts it at the median, not above or below it. The method behind the annual energy and cost figures explains each input separately.

The medium draw pattern represents a typical household of moderate size on a busy morning. The ENS50T-DR*** has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 61 gallons. Its rated volume is 46 gallons. For a household whose daily use is close to the test's medium draw, 3,531 kWh is the matching reference figure for this unit. A household that uses much more or much less hot water will not match that figure. The registry data does not show how far that household's actual use would differ. To check a unit against others in the same class, you can find a same-class replacement by model number.

This page does not state a running cost for the ENS50T-DR***. The cost is 3,531 kWh of electricity multiplied by the reader's own utility electricity tariff. The registry data carries no tariff, so no cost figure is estimated here. The cost calculator for your own ZIP applies your local electricity rate to that annual figure. A cost worked out this way holds only at the medium draw pattern and the test's daily hot-water draw. The installed price range appears in its own block on this page, with its source and date. That range is a modeled installed-cost range. It is not a quote from an installer.