AMERICAN PESX-50 1**

The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.92 for this model. That value is the input behind the annual figure. This site computed 3,531 kWh by combining it with the DOE test's daily hot-water draw for the medium draw pattern; the registry itself does not publish the annual figure. The source is DOE CCD, retrieved 2026-09-19. The class is the 426 models registered as an electric tank at the medium draw pattern. Its median is 3,531 kWh, so this model is equal to the median, a difference of 0 kWh. It is 213th lowest in energy use of 426, in the second-lowest quarter of its class. The methodology page explains how the annual figure is calculated.

The 3,531 kWh figure applies only to the medium draw pattern. This model has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 70 gallons and a rated volume of 46 gallons. It suits a household whose busiest hour of hot-water use stays within 70 gallons. A household with a heavier peak hour is not covered by that rating. The same applies to a household whose daily use differs from the medium draw pattern: the registry data here do not show what such a household would use. The energy figure also says nothing about the fuel or space available in a home. The water heater selector filters by fuel, space and size.

Running cost depends on the electricity rate you pay, so this text states no cost figure and does not estimate one. To check it by hand, multiply 3,531 kWh by your own utility tariff per kilowatt-hour. The cost calculator does this from your ZIP. The result holds only for the medium draw pattern. This registry does not measure actual use in a home, so how far real consumption departs from 3,531 kWh is unknown. A separate block on this page shows a modeled installed-cost range with its source and date; it is not a quote. To compare against a unit of the same class, find a same-class replacement by model number, starting from PESX-50 1**.