Rheem PROE36 S2 RH CG

The registry does not list the 3,531 kWh figure. This site computes it from two inputs. The first is the registry's UEF, the ratio of hot water delivered to energy used. The second is the DOE test's daily hot-water draw for the medium draw pattern. This model's UEF is 0.92, taken from the DOE Compliance Certification Database and retrieved 2026-09-19. The result applies only at the federal test's draw. A household that uses more hot water each day will use more electricity than 3,531 kWh. One that uses less will use less. The figure is not a measured reading from any home. The steps behind it are set out in how the annual cost is calculated.

The rating matches a home whose hot-water use looks like the medium draw pattern: a typical household with a busy morning. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 51 gallons. The rated volume is 33 gallons. A plumber checking a replacement can compare these two values with the old unit's label. To find a unit in the same class, use find a same-class replacement by model number. If a home's morning peak is more than 51 gallons in an hour, this rating does not cover that demand. A reader who wants energy use below the class median needs a model ranked ahead of 213th. The selector by fuel, space and size filters by those needs.

This text does not give a running cost, because the cost depends on the reader's own electricity rate. The cost is 3,531 kWh multiplied by the reader's price per kilowatt-hour, and that price varies by utility. The cost calculator on your own ZIP does this step with a local rate. Its result has the same condition as the energy figure: it holds at the medium draw pattern with a UEF of 0.92. What a given home will pay is unknown until both its real daily hot-water use and its rate are known. The installed price appears in its own block with its source and date. It is a modeled installed-cost range, not a quote, and this text does not repeat its figures.