HEAT-FLO SSN-52D

The registry lists this model with a UEF, the ratio of hot water delivered to energy used, of 0.92. This site multiplies that value by the daily hot-water draw in the DOE test for the medium draw pattern. The result is 3,531 kWh of electricity a year, using data from DOE CCD retrieved 2026-09-19. The registry does not publish this annual figure itself, so it is a calculation by this site. It applies only at the federal test's daily draw. A home that draws more or less hot water will differ, and this page has no figure for those cases. The methodology page sets out how the annual cost is calculated from this energy figure.

Among the 426 models registered as an electric tank at the medium draw pattern, this unit has the 213th lowest energy use. That places it in the second-lowest quarter of its class. Its 3,531 kWh matches the class median of 3,531 kWh, so the difference is 0 kWh. The unit has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 65 gallons, and a rated volume of 51 gallons. It suits a household whose hot-water use resembles the medium draw pattern and that is looking at electric tanks. It does not suit a household with much heavier or lighter use, because the figure was not computed for those draws. The water heater selector filters by fuel, space and size.

The running cost of this model depends on the electricity tariff in the reader's own area, so the text gives none. Multiplying 3,531 kWh by a local rate per kilowatt-hour gives the yearly cost at the medium draw pattern. The cost calculator does this from a ZIP code. The modeled installed-cost range appears in its own block on this page, with its source and date, and it is not a quote. To find a same-class replacement for the HEAT-FLO SSN-52D, the replacement finder searches by model number. Any comparison should use the same draw pattern, because the 426 models in this class were compared at the medium draw only.