MARATHON MR50245 C

The 3,569 kWh figure comes from this site's own calculation. The registry does not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the medium draw pattern. For this unit the UEF is 0.91, taken from the DOE CCD, retrieved 2026-09-19. The result holds only at the federal test's daily draw. A home that draws more or less hot water than the test assumes will not match it. Read it as a test-condition value for comparing models, not as a meter reading for a specific house. The page on how this site calculates the annual energy and cost sets out each input and step.

Among the 426 electric tank models registered at the medium draw pattern, this unit ranks 425th for lowest energy use. That puts it in the highest quarter of its class for energy use. Its gap from the class median is 38 kWh a year, at the test's daily draw. The tank holds 50 gallons, and its first hour rating, the gallons of hot water available in the first hour from a full tank, is 57. These ratings describe a household whose use matches the medium pattern. They say nothing about performance at other draw patterns. Readers who need a unit of different fuel or size can use the selector by fuel, space and size. To compare this model with others in the same class, see same-class replacements by model number.

This page does not state a running cost. The yearly bill equals 3,569 kWh times the reader's own utility electricity rate, and that rate differs by tariff. The cost calculator for your own ZIP applies your local rate to this unit's test-draw energy use. An installed price range is not available for this model. Its ratings, including the 0.91 UEF and 50-gallon volume, lie outside the range the cost database's model was fitted on. The site does not extend that model past its fitted range, so no installed price is shown. What remains verifiable here is the registry UEF, the class rank of 425th of 426, and the 38 kWh gap from the median.