Rheem PROPH65 T2 RH400-30

It holds 59 gallons in the test, 6 gallons less than its 65-gallon sold size. Over one hour from a full tank, it gave 75 gallons in the test (its first-hour rating). That is 16 gallons more than its tank holds, since it reheats during the hour. Of 481 heat pump models, 193 give more hot water in the first hour. The median heat pump model gives 72 gallons in its first hour.

Its single model number, PROPH65 T2 RH400-30, is ENERGY STAR certified. In the test, it delivered 4.05 units of hot water energy for each unit used (its UEF). It moves heat from the air rather than making it, so its UEF passes 1. Its test simulated a day of high hot water use (its draw pattern). Of 237 heat pump models with the same draw pattern, 32 have a higher UEF and 172 a lower one. A UEF of 3.88 is the median for its type and draw pattern. Its recovery efficiency is 457%, because it takes heat from the air as it reheats water.

All of its test figures are shared by 29 other basic models. Of those, one or more are under the Friedrich, Richmond, and Ruud brands. For the full group, see the Rheem PROPH65 T2 RH375-SO.

It may qualify for 17 rebate programs. Another 5 programs may accept it if it meets their other terms.