Ruud PROUH65 T2 CD400-30

It holds 59 gallons in the test, 6 gallons less than its 65-gallon sold size. Starting full, it gives 75 gallons of hot water in its first hour of use. Its tank holds 59 gallons, so reheating adds 16 gallons during the first 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.

The single model number sold under it is ENERGY STAR certified. In the test, it gives 4.05 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. 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. On its draw pattern, the median heat pump UEF is 3.88. When it reheats water in the test, the water gains 457% of the energy it uses.

All of its test figures are shared by 29 other basic models. Of those, one or more are under the Friedrich, Rheem, and Richmond brands. You can find the whole group on the page for the Rheem PROPH65 T2 RH375-SO.

It may qualify for 20 rebate programs. It may qualify for 7 more if it meets terms its figures do not show.