Ranein RE27K

The figure of 5,334 kWh is not a registry entry. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the high draw pattern. The registry lists a UEF of 0.93 for the Ranein RE27K. The fuel is electricity, so the total is in kilowatt-hours. The source is DOE CCD, retrieved 2026-09-19. The figure describes the test's daily draw only, and a household that uses more or less hot water than the test assumes will see a different annual total. The steps behind the calculation are on the methodology for annual cost page.

The high draw pattern describes a larger household, or one where showers and laundry overlap. The 5,334 kWh figure is therefore most relevant to a home that matches that description. It is less relevant to a smaller household, whose test draw, and so whose annual total, would differ. The registry lists a maximum flow rate in gallons per minute of 6.5 for the RE27K. The data here does not show how that flow changes with the incoming water temperature of a particular home, so that relationship is not available. A reader comparing sizes can use the water heater selector by fuel, space and size to narrow the options.

The running cost is not written in the text because it depends on your own utility electricity tariff. Multiplying 5,334 kWh by your rate per kilowatt-hour gives the yearly electricity cost at the test's draw. The cost calculator for your ZIP does this for you. A rank in class is not given, because the class median is not available for this draw pattern. To look for a unit in the same class as the RE27K, you can find a same-class replacement by model number. The modeled installed-cost range appears in its own block on this page, with its source and date.