Rheem PROPH50 T2 RH400-30

It holds 45 gallons in the test, 5 gallons less than its 50-gallon sold size. Starting full, it gives 67 gallons of hot water in its first hour of use. Reheating lets it give 22 gallons beyond the 45 gallons in its tank. Among 481 heat pump models, 287 have a higher first-hour rating. Among heat pump models, the median first-hour rating is 72 gallons.

Under this basic model, 8 model numbers are ENERGY STAR certified. For each unit of energy it uses, 3.88 units end up in the hot water (its UEF). Pulling heat from the air lets its UEF pass 1. The daily hot water use in the test, called its draw pattern, was medium. 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. While it reheats, the water gains 430% of the energy it uses (its recovery efficiency).

A tag or quote may show any of its 10 model numbers. Its test figures match those of 13 other basic models. The Friedrich, Richmond, and Ruud brands list one or more of them. For the full group, see the Rheem PROPH50 T2 RH375-SO.

It may qualify for 21 rebate programs. It may qualify for 7 more if it meets terms its figures do not show.