Richmond 10CE50-HP5US30

It holds 45 gallons in the test, 5 gallons less than its 50-gallon sold size. Over one hour from a full tank, it gave 67 gallons in the test (its first-hour rating). That is 22 gallons more than its tank holds, since it reheats during the hour. In the first hour, 287 of the 481 heat pump models give more hot water. Among heat pump models, the median first-hour rating is 72 gallons.

Its single model number, 10CE50-HP5US30, is ENERGY STAR certified. In the test, it gives 3.88 units of hot water energy per unit it uses (its UEF). A UEF above 1 is possible because it moves heat from the air into the water. In the test, daily hot water use was set to medium (its draw pattern). Among 226 heat pump models on its draw pattern, 6 have a higher UEF. A UEF of 3.68 is the median for its type and draw pattern. When it reheats water in the test, the water gains 430% of the energy it uses.

All of its test figures are shared by 13 other basic models. Those basic models are sold with Friedrich, Rheem, and Ruud as their brand names. You can find the whole group on the page for the Rheem PROPH50 T2 RH375-SO.

In 20 states, 21 rebate programs may accept it. It may qualify for 7 more if it meets terms its figures do not show.