Rheem PROPH50 T0 RH120

It holds 46 gallons in the test, 4 gallons less than its 50-gallon sold size. Starting full, it gives 51 gallons of hot water in its first hour of use. Its tank holds 46 gallons, so reheating adds 5 gallons during the first hour. In the first hour, 455 of the 481 heat pump models give more hot water. The median heat pump model gives 72 gallons in the first hour of the test.

All 3 of its model numbers are ENERGY STAR certified. In the test, it delivered 3.00 units of hot water energy for each unit used (its UEF). Pulling heat from the air lets its UEF pass 1. Its test simulated a day of medium hot water use (its draw pattern). Its UEF is lower than that of 208 of the 226 heat pump models with its draw pattern. For its type and draw pattern, the median UEF is 3.68. While it reheats, the water gains 350% of the energy it uses (its recovery efficiency).

Its 3 model numbers are PROPH50 T0 RH120, XE50T10H15U0, and XE50T10HD00U0. All of its test figures are shared by 3 other basic models. The Friedrich, Richmond, and Ruud brands list one or more of them.

In 20 states, 19 rebate programs may accept it. Another 5 programs may accept it if it meets their other terms.