Ruud PROE40 M2 RH95

This site computes the 3,493 kWh figure; the registry does not publish it. The figure 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 pattern. The UEF for this model is 0.93, from DOE CCD data retrieved 2026-09-19. On the federal test, the medium pattern represents a typical household's daily use. The tank's rated volume is 36 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 55 gallons. That equals the busy-morning demand the medium pattern describes. The steps behind these figures are set out in how the annual cost is calculated.

This model is compared with the 426 electric tanks registered at the medium draw pattern. Within that class, it uses 38 kWh less a year than the class median of 3,531 kWh. It ranks 153rd lowest in energy use. The figure is most useful to a reader whose household draw is close to the medium pattern. It is less useful where daily use is heavier or lighter, because the computed annual energy follows the test's daily draw. This page has no energy figure for other draw patterns, so that value is not available. A reader matching a like-for-like swap can find a same-class replacement by model number. A reader comparing other sizes or fuels can use the water heater selector by fuel, space and size.

The running cost is not stated in this text. It depends on your own utility electricity tariff, which the text cannot know in advance. The page works it out from the 3,493 kWh of electricity at the medium draw pattern and the tariff for your ZIP. You can check that result in the cost calculator for your own ZIP. The 38 kWh gap to the class median works the same way: what it is worth depends on your rate. The installed price is shown in its own block, with its source and date. That block gives a modeled installed-cost range, not a quote.